M38B78M2

To all our customers Regarding the change of names mentioned in the document, such as Mitsubishi Electric and Mitsubishi XX, to Renesas Technology Corp. The semiconductor operations of Hitachi and Mitsubishi Electric were transferred to Renesas Technology Corporation on April 1st 2003. These operations include microcomputer, logic, analog and discrete devices, and memory chips other than DRAMs (flash memory, SRAMs etc.) Accordingly, although Mitsubishi Electric, Mitsubishi Electric Corporation, Mitsubishi Semiconductors, and other Mitsubishi brand names are mentioned in the document, these names have in fact all been changed to Renesas Technology Corp. Thank you for your understanding. Except for our corporate trademark, logo and corporate statement, no changes whatsoever have been made to the contents of the document, and these changes do not constitute any alteration to the contents of the document itself. Note : Mitsubishi Electric will continue the business operations of high frequency & optical devices and power devices. Renesas Technology Corp. Customer Support Dept. April 1, 2003 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER DESCRIPTION The 38B7 group is the 8-bit microcomputer based on the 740 family core technology. The 38B7 group has six 8-bit timers, one 16-bit timer, a fluorescent display automatic display circuit, 16-channel 10-bit A-D converter, a serial I/O with automatic transfer function, which are available for controlling musical instruments and household appliances. FEATURES Basic machine-language instructions ....................................... 71 The minimum instruction execution time .......................... 0.48 µ s (at 4.2 MHz oscillation frequency) Memory size ROM ........................................................ 60K bytes RAM .......................................................2048 bytes Programmable input/output ports ............................................. 75 High-breakdown-voltage output ports ...................................... 52 Software pull-up resistors . (Ports P64 to P67, P7, P80 to P83, P9, PA, PB) Interrupts .................................................. 22 sources, 16 vectors Timers ........................................................... 8-bit ✕ 6, 16-bit ✕ 1 Serial I/O1 (Clock-synchronized) ................................... 8-bit ✕ 1 (max. 256-byte automatic transfer function) Serial I/O2 (UART or Clock-synchronized) .................... 8-bit ✕ 1 Serial I/O3 (Clock-synchronized) ................................... 8-bit ✕ 1 PWM ............................................................................ 14-bit ✕ 1 8-bit ✕ 1 (also functions as timer 6) A-D converter .............................................. 10-bit ✕ 16 channels D-A converter ................................................................ 1 channel Fluorescent display function ......................... Total 56 control pins Interrupt interval determination function ..................................... 1 (Serviceable even in low-speed mode) Watchdog timer ............................................................ 16-bit ✕ 1 Buzzer output ............................................................................. 1 Two clock generating circuits Main clock (XIN–XOUT) .......................... Internal feedback resistor Sub-clock (XCIN–XCOUT) .......... Without internal feedback resistor (connect to external ceramic resonator or quartz-crystal oscillator) Power source voltage In high-speed mode ................................................... 4.0 to 5.5 V (at 4.2 MHz oscillation frequency and high-speed selected) In middle-speed mode ........................................... 2.7 to 5.5 V (*) (at 4.2 MHz oscillation frequency and middle-speed selected) In low-speed mode ................................................ 2.7 to 5.5 V (*) (at 32 kHz oscillation frequency) (*: 4.0 to 5.5 V for Flash memory version) Power dissipation In high-speed mode .......................................................... 35 mW (at 4.2 MHz oscillation frequency) In low-speed mode ............................................................. 60 µ W (at 32 kHz oscillation frequency, at 3 V power source voltage) Operating temperature range ................................... –20 to 85 °C • • • • • • • • • • • • • • • • • • • q Supply voltage ................................................. VCC = 5 V ± 10 % q Program/Erase voltage ............................... VPP = 11.7 to 12.6 V q Programming method ...................... Programming in unit of byte q Erasing method Batch erasing ........................................ Parallel/Serial I/O mode Block erasing .................................... CPU reprogramming mode q Program/Erase control by software command q Number of times for programming/erasing ............................ 100 qOperating temperature range (at programming/erasing) ..................................................................... Normal temperature sNotes 1. The flash memory version cannot be used for application embedded in the MCU card. 2. Power source voltage Vcc of the flash memory version is 4.0 to 5.5 V. APPLICATION Musical instruments, VCR, household appliances, etc. • • • 1 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER PIN CONFIGURATION (TOP VIEW) 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 *P27/FLD7 *P26/FLD6 *P25/FLD5 *P24/FLD4 *P23/FLD3 *P22/FLD2 *P21/FLD1 *P20/FLD0 VE E PB6/SIN1 PB5/SOUT1 PB4/SCLK11 PB3/SSTB1 PB2/SBUSY1 PB1/SRDY1 PB0/SCLK12/DA AVSS VREF PA7/AN7 PA6/AN6 55 54 53 52 51 *P00/FLD8 *P01/FLD9 *P02/FLD10 *P03/FLD11 *P04/FLD12 *P05/FLD13 *P06/FLD14 *P07/FLD15 *P10/FLD16 *P11/FLD17 *P12/FLD18 *P13/FLD19 *P14/FLD20 *P15/FLD21 *P16/FLD22 *P17/FLD23 *P30/FLD24 *P31/FLD25 *P32/FLD26 *P33/FLD27 *P34/FLD28 *P35/FLD29 *P36/FLD30 *P37/FLD31 *P40/FLD32 *P41/FLD33 *P42/FLD34 *P43/FLD35 *P44/FLD36 *P45/FLD37 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 M38B79MFH-XXXXFP 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 *P46/FLD38 *P47/FLD39 *P50/FLD40 *P51/FLD41 *P52/FLD42 *P53/FLD43 *P54/FLD44 *P55/FLD45 *P56/FLD46 *P57/FLD47 *P60/FLD48 *P61/FLD49 *P62/FLD50 *P63/FLD51 P64/RxD/FLD52 P65/TxD/FLD53 P66/SCLK21/FLD54 P67/SRDY2/SCLK22/FLD55 P70/INT0 P71/INT1 Fig. 1 Pin configuration of M38B79MFH-XXXXFP 2 PA5/AN5 PA4/AN4 PA3/AN3 PA2/AN2 PA1/AN1 PA0/AN0 P97/BUZ02/AN15 P96/PWM0/AN14 P95/RTP0/AN13 P94/RTP1/AN12 P93/SRDY3/AN11 P92/SCLK3/AN10 P91/SOUT3/AN9 P90/SIN3/AN8 P83/CNTR0/CNTR2 P82/CNTR1 C N VS S RESET P81/XCOUT P80/XCIN VS S XIN XOUT VCC P77/INT4/BUZ01 P76/T3OUT P75/T1OUT P74/PWM1 P73/INT3/DIMOUT P72/INT2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 *High-breakdown-voltage output port: Totaling 52 Package type: 100P6S-A FUNCTIONAL BLOCK DIAGRAM 8 8 8 8 Port P4(8) Port P5(8) Port P3(8) Port P2(8) Port P1(8) 8 I/O ports 8 Fig. 2 Functional block diagram Port P0(8) Build-in peripheral functions Timers System clock generation A-D converter (10-bit ✕ 12 channel) Serial I/Os Serial I/O1(Clock-synchronized) (256 byte automatic transfer) Serial I/O2 (Clock-synchronized or UART) Timer X(16-bit) Timer 1(8-bit) Timer 2(8-bit) Timer 3(8-bit) Timer 4(8-bit) Timer 5(8-bit) Timer 6(8-bit) XIN-XOUT (main-clock) XCIN-XCOUT (sub-clock) Serial I/O3(Clock-synchronized) PWM1(8-bit) Me mo r y CPU core ROM PWM0(14-bit) Buzzer output Watchdog timer RAM Interrupt interval determination function FLD display function 56 control pins (52 high-breakdown voltage ports) Port P6(8) Port P7(8) 8 Port P8(4) 4 Port P9(8) 8 Port PA(8) 8 Port PB(7) 7 8 MITSUBISHI MICROCOMPUTERS SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER 38B7 Group 3 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Table 1 Pin description (1) Pin VCC, VSS CNVSS VEE VREF AV SS ______ Name Power source CNVSS Pull-down power source Reference voltage Analog power source Reset input Clock input Function • Apply voltage of 4.0–5.5 V to VCC, and 0 V to V SS. • Connect to V SS. • VPP power input pin in flash memory mode. • Apply voltage supplied to pull-down resistors of ports P0, P1, P2 and P3. • Reference voltage input pin for A-D converter. • Analog power source input pin for A-D converter. • Connect to V SS. • Reset input pin for active “L”. • Input and output pins for the main clock generating circuit. Function except a port function RESET XIN XOUT Clock output P00/FLD8– P07/FLD15 Output port P0 • Feedback resistor is built in between XIN pin and XOUT pin. • Connect a ceramic resonator or quartz-crystal oscillator between the XIN and XOUT pins to set the oscillation frequency. • When an external clock is used, connect the clock source to the XIN pin and leave the X OUT pin open. • The clock is used as the oscillating source of system clock. • 8-bit output port. • FLD automatic display • High-breakdown-voltage P-channel open-drain output structure. pins • A pull-down resistor is built in between port P0 and the VEE pin. • At reset, this port is set to VEE level. • 8-bit I/O port. • FLD automatic display • I/O direction register allows each pin to be individually programmed as either pins input or output. • At reset, this port is set to input mode. • Low-voltage input level. • High-breakdown-voltage P-channel open-drain output structure. • A pull-down resistor is built in between port P1 and the VEE pin. • At reset, this port is set to VEE level. • 8-bit output port with the same function as port P0. • High-breakdown-voltage P-channel open-drain output structure. • A pull-down resistor is built in between port P2 and the VEE pin. • At reset, this port is set to VEE level. • 8-bit I/O port with the same function as port P1. • Low-voltage input level. • High-breakdown-voltage P-channel open-drain output structure. • A pull-down resistor is built in between port P3 and the VEE pin. • At reset, this port is set to VEE level. • 8-bit I/O port with the same function as port P1. • Low-voltage input level. • High-breakdown-voltage P-channel open-drain output structure. • A pull-down resistor is not built in between port P4 and the VEE pin. • 8-bit I/O port with the same function as port P1. • Low-voltage input level. • High-breakdown-voltage P-channel open-drain output structure. • A pull-down resistor is not built in between port P5 and the VEE pin. • 4-bit I/O port with the same function as port P1. • Low-voltage input level. • High-breakdown-voltage P-channel open-drain output structure. • A pull-down resistor is not built in between port P6 and the VEE pin. P10/FLD16 – I/O port P1 P17/FLD23 P20/FLD0– P27/FLD7 Output port P2 • FLD automatic display pins P30/FLD24 – P37/FLD31 I/O port P3 • FLD automatic display pins P40/FLD32 – I/O port P4 P47/FLD39 • FLD automatic display pins P50/FLD40 – I/O port P5 P57/FLD47 • FLD automatic display pins P60/FLD48 – I/O port P6 P63/FLD51 • FLD automatic display pins 4 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Table 2 Pin description (2) Pin P64/RXD/FLD 52, Name I/O port P6 • 4-bit I/O port . • Low-voltage input level for input ports. • CMOS compatible input level for RxD, SCLK21, SCLK22. • CMOS 3-state output structure. • 8-bit I/O port. • CMOS compatible input level. • CMOS 3-state output structure. • Interrupt input pin • Dimmer signal output pin • PWM output pin • Timer output pins • Interrupt input pin • Buzzer output pin • I/O pins for sub-clock generating circuit (connect a ceramic resonator or a quarts-crystal oscillator) Function Function except a port function • FLD automatic display pins • Serial I/O2 function pins P65/T XD/FLD53, P66/S CLK21/FLD54, P67/S RDY2/SCLK22/ FLD55 , P70/INT0, I/O port P7 P71/INT1, P72/INT2, P73/INT 3/DIMOUT , P74/PWM1 P75/T1 OUT, P76/T3 OUT, P77/INT 4/B UZ01 P80/XCIN, P81/XCOUT I/O port P8 • Interrupt input pins • 4-bit I/O port with the same function as port P7. • CMOS compatible input level. • CMOS 3-state output structure. P82/CNTR1, P83/CNTR0/CNTR2 P90/S IN3/AN8, I/O port P9 P91/S OUT3/AN9, P92/S CLK3/AN10 , P93/S RDY3/AN11 , P94/RTP 1/AN12 , P95/RTP 0/AN13 P96/PWM0/AN14 P97/B UZ02/AN15 PA0/AN0 –PA7 /AN7 I/O port PA • 8-bit I/O port with the same function as port P7. • CMOS compatible input level. • CMOS 3-state output structure. • Timer input pin • Timer I/O pin • Serial I/O3 function pins • A-D converter input pins • Real time port output pins • A-D converter input pins • 14-bit PWM output pin • A-D converter input pin • Buzzer output pin • A-D converter input pin • A-D converter input pin • 8-bit I/O port with the same function as port P7. • CMOS compatible input level. • CMOS 3-state output structure. • 7-bit I/O port with the same function as port P7. • CMOS compatible input level. • CMOS 3-state output structure. PB 0/SCLK12/DA I/O port PB • Serial I/O1 function pin • D-A converter output pin • Serial I/O1 function pins PB 1/SRDY1, PB 2/SBUSY1 , PB 3/SSTB1, PB 4/SCLK11, PB 5/SOUT1, PB6/SIN1 5 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Product M38B7 9 M F H - AXXX FP Package type FP : 100P6S-A package ROM number Omitted in Flash memory version ROM/Flash memory size 1 : 4096 bytes 2 : 8192 bytes 3 : 12288 bytes 4 : 16384 bytes 5 : 20480 bytes 6 : 24576 bytes 7 : 28672 bytes 8 : 32768 bytes 9 : 36864 bytes A : 40960 bytes B : 45056 bytes C : 49152 bytes D : 53248 bytes E : 57344 bytes F : 61440 bytes The first 128 bytes and the last 2 bytes of ROM are reserved areas ; they cannot be used for users. Memory type M : Mask ROM version F : Flash memory version RAM size 0 : 192 bytes 1 : 256 bytes 2 : 384 bytes 3 : 512 bytes 4 : 640 bytes 5 : 768 bytes 6 : 896 bytes 7 : 1024 bytes 8 : 1536 bytes 9 : 2048 bytes Fig. 3 Part numbering 6 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER GROUP EXPANSION Mitsubishi plans to expand the 38B7 group as follows. Memory Type Support for Mask ROM and Flash memory versions. Memory Size Flash memory size ........................................................... 60K bytes Mask ROM size ................................................................ 60K bytes RAM size .........................................................................2048 bytes Package 100P6S-A .................................. 0.65 mm-pitch plastic molded QFP Mass product ROM size (bytes) 60 K 56 K 52 K 48 K 44 K 40 K 36 K 32 K 28 K 24 K 20 K 16 K 12 K 8K 4K 256 512 768 1,024 1,536 M38B79FF M38B79MFH Mass product 2,048 RAM size (bytes) Note : Products under development: the development schedule and specifications may be revised without notice. Fig. 4 Memory expansion plan Currently supported products are listed below. Table 3 List of supported products ROM size (bytes) Product ROM size for User ( ) M38B79MFH-XXXXFP 61440 (61310) M38B79FFFP As of Oct. 2001 RAM size (bytes) 2048 Package 100P6S-A Remarks Mask ROM version Flash memory version 7 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER FUNCTIONAL DESCRIPTION Central Processing Unit (CPU) The 38B7 group uses the standard 740 Family instruction set. Refer to the table of 740 Series addressing modes and machine instructions or the 740 Series Software Manual for details on the instruction set. Machine-resident 740 Series instructions are as follows: The FST and SLW instructions cannot be used. The STP, WIT, MUL, and DIV instructions can be used. [Stack Pointer (S)] The stack pointer is an 8-bit register used during subroutine calls and interrupts. This register indicates start address of stored area (stack) for storing registers during subroutine calls and interrupts. The low-order 8 bits of the stack address are determined by the contents of the stack pointer. The high-order 8 bits of the stack address are determined by the stack page selection bit. If the stack page selection bit is “0” , the high-order 8 bits becomes “0016 ”. If the stack page selection bit is “1”, the high-order 8 bits becomes “0116 ”. The operations of pushing register contents onto the stack and popping them from the stack are shown in Figure 6. Store registers other than those described in Figure 6 with program when the user needs them during interrupts or subroutine calls. [Accumulator (A)] The accumulator is an 8-bit register. Data operations such as data transfer, etc., are executed mainly through the accumulator. [Index Register X (X)] The index register X is an 8-bit register. In the index addressing modes, the value of the OPERAND is added to the contents of register X and specifies the real address. [Program Counter (PC)] The program counter is a 16-bit counter consisting of two 8-bit registers PC H and PC L. It is used to indicate the address of the next instruction to be executed. [Index Register Y (Y)] The index register Y is an 8-bit register. In partial instruction, the value of the OPERAND is added to the contents of register Y and specifies the real address. b7 A b7 X b7 Y b7 S b15 PCH b7 b7 PCL b0 Accumulator b0 Index register X b0 Index register Y b0 Stack pointer b0 Program counter b0 Processor status register (PS) Carry flag Zero flag Interrupt disable flag Decimal mode flag Break flag Index X mode flag Overflow flag Negative flag NVTBD I ZC Fig. 5 740 Family CPU register structure 8 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER On-going Routine Interrupt request (Note) Execute JSR M (S) Push return address on stack (S) M (S) (S) (PCH) (S) – 1 (PCL) (S)– 1 M (S) (S) M (S) (S) M (S) (S) (PCH) (S) – 1 (PCL) (S) – 1 (PS) (S) – 1 Push contents of processor status register on stack Push return address on stack Subroutine Execute RTS POP return address from stack (S) (PCL) (S) (PCH) (S) + 1 M (S) (S) + 1 M (S) Interrupt Service Routine Execute RTI (S) (PS) (S) (PCL) (S) (PCH) (S) + 1 M (S) (S) + 1 M (S) (S) + 1 M (S) I Flag is set from “0” to “1” Fetch the jump vector POP contents of processor status register from stack POP return address from stack Note: Condition for acceptance of an interrupt Interrupt enable flag is “1” Interrupt disable flag is “0” Fig. 6 Register push and pop at interrupt generation and subroutine call Table 4 Push and pop instructions of accumulator or processor status register Push instruction to stack Accumulator Processor status register PHA PHP Pop instruction from stack PLA PLP 9 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER [Processor status register (PS)] The processor status register is an 8-bit register consisting of 5 flags which indicate the status of the processor after an arithmetic operation and 3 flags which decide MCU operation. Branch operations can be performed by testing the Carry (C) flag , Zero (Z) flag, Overflow (V) flag, or the Negative (N) flag. In decimal mode, the Z, V, N flags are not valid. •Bit 0: Carry flag (C) The C flag contains a carry or borrow generated by the arithmetic logic unit (ALU) immediately after an arithmetic operation. It can also be changed by a shift or rotate instruction. •Bit 1: Zero flag (Z) The Z flag is set if the result of an immediate arithmetic operation or a data transfer is “0”, and cleared if the result is anything other than “0”. •Bit 2: Interrupt disable flag (I) The I flag disables all interrupts except for the interrupt generated by the BRK instruction. Interrupts are disabled when the I flag is “1”. •Bit 3: Decimal mode flag (D) The D flag determines whether additions and subtractions are executed in binary or decimal. Binary arithmetic is executed when this flag is “0”; decimal arithmetic is executed when it is “1”. Decimal correction is automatic in decimal mode. Only the ADC and SBC instructions can be used for decimal arithmetic. •Bit 4: Break flag (B) The B flag is used to indicate that the current interrupt was generated by the BRK instruction. The BRK flag in the processor status register is always “0”. When the BRK instruction is used to generate an interrupt, the processor status register is pushed onto the stack with the break flag set to “1”. •Bit 5: Index X mode flag (T) When the T flag is “ 0 ” , arithmetic operations are performed between accumulator and memory. When the T flag is “1”, direct arithmetic operations and direct data transfers are enabled between memory locations. •Bit 6: Overflow flag (V) The V flag is used during the addition or subtraction of one byte of signed data. It is set if the result exceeds +127 to -128. When the BIT instruction is executed, bit 6 of the memory location operated on by the BIT instruction is stored in the overflow flag. •Bit 7: Negative flag (N) The N flag is set if the result of an arithmetic operation or data transfer is negative. When the BIT instruction is executed, bit 7 of the memory location operated on by the BIT instruction is stored in the negative flag. Table 5 Set and clear instructions of each bit of processor status register C flag Set instruction Clear instruction SEC CLC Z flag _ _ I flag SEI CLI D flag SED CLD B flag _ _ T flag SET CLT V flag _ CLV N flag _ _ 10 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER [CPU Mode Register (CPUM)] 003B 16 The CPU mode register contains the stack page selection bit and the internal system clock selection bit etc. The CPU mode register is allocated at address 003B 16 . b7 b0 CPU mode register (CPUM: address 003B16) Processor mode bits b1b0 0 0 : Single-chip mode 0 1: 1 0 : Not available 1 1: Stack page selection bit 0 : Page 0 1 : Page 1 Not used (return “1” when read) (Do not write “0” to this bit.) Port XC switch bit 0 : I/O port function 1 : XCIN–XCOUT oscillating function Main clock (XIN–XOUT) stop bit 0 : Oscillating 1 : Stopped Main clock division ratio selection bit 0 : f(XIN) (high-speed mode) 1 : f(XIN)/4 (middle-speed mode) Internal system clock selection bit 0 : XIN-XOUT selection (middle-/high-speed mode) 1 : XCIN-XCOUT selection (low-speed mode) Fig. 7 Structure of CPU mode register 11 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER MEMORY Special Function Register (SFR) Area The special function register (SFR) area contains control registers for I/O ports, timers and other functions. Interrupt Vector Area The interrupt vector area contains reset and interrupt vectors. Zero Page The zero page addressing mode can be used to specify memory and register addresses in the zero page area. Access to this area with only 2 bytes is possible in the zero page addressing mode. RAM RAM is used for data storage and for stack area of subroutine calls and interrupts. Special Page ROM The first 128 bytes and the last 2 bytes of ROM are reserved for device testing, and the other areas are user areas for storing programs. The special page addressing mode can be used to specify memory addresses in the special page area. Access to this area with only 2 bytes is possible in the special page addressing mode. RAM area RAM size (byte) Address XXXX16 000016 RAM 004016 010016 SFR area 1 Zero page 192 256 384 512 640 768 896 1024 1536 2048 ROM area ROM size (byte) 00FF16 013F16 01BF16 023F16 02BF16 033F16 03BF16 043F16 063F16 083F16 XXXX16 044016 0E0016 0EDF16 0EE016 0EFF16 0F0016 0FFF16 YYYY16 Reserved area Not used (Note) RAM area for FLD automatic display SFR area 2 RAM area for Serial I/O automatic transfer Address YYYY16 Address ZZZZ16 4096 8192 12288 16384 20480 24576 28672 32768 36864 40960 45056 49152 53248 57344 61440 F00016 E00016 D00016 C00016 B00016 A00016 900016 800016 700016 600016 500016 400016 300016 200016 100016 F08016 E08016 D08016 C08016 B08016 A08016 908016 808016 708016 608016 508016 408016 308016 208016 108016 ROM Reserved ROM area (common ROM area,128 bytes) ZZZZ16 FF0016 FFDC16 Interrupt vector area FFFE16 FFFF16 Reserved ROM area Special page Note: When 1024 bytes or more are used as RAM area, this area can be used. Fig. 8 Memory map diagram 12 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER 000016 000116 000216 000316 000416 000516 000616 000716 000816 000916 000A16 000B16 000C16 000D16 000E16 000F16 001016 001116 001216 001316 001416 001516 001616 001716 001816 001916 001A16 001B16 001C16 001D16 001E16 001F16 0EEC16 0EED16 0EEE16 0EEF16 0EF016 0EF116 0EF216 0EF316 0EF416 0EF516 Port P0 (P0) 002016 002116 Timer 1 (T1) Timer 2 (T2) Timer 3 (T3) Timer 4 (T4) Timer 5 (T5) Timer 6 (T6) PWM control register (PWMCON) Timer 6 PWM register (T6PWM) Timer 12 mode register (T12M) Timer 34 mode register (T34M) Timer 56 mode register (T56M) D-A conversion register (DA) Timer X (low-order) (TXL) Timer X (high-order) (TXH) Timer X mode register 1 (TXM1) Timer X mode register 2 (TXM2) Interrupt interval determination register (IID) Interrupt interval determination control register (IIDCON) Port P1 (P1) Port P1 direction register (P1D) Port P2 (P2) 002216 002316 002416 002516 Port P3 (P3) Port P3 direction register (P3D) Port P4 (P4) Port P4 direction register (P4D) Port P5 (P5) Port P5 direction register (P5D) Port P6 (P6) Port P6 direction register (P6D) Port P7 (P7) Port P7 direction register (P7D) Port P8 (P8) Port P8 direction register (P8D) Port P9 (P9) Port P9 direction register (P9D) Port PA (PA) Port PA direction register (PAD) Port PB (PB) Port PB direction register (PBD) Serial I/O1 automatic transfer data pointer (SIO1DP) 002616 002716 002816 002916 002A16 002B16 002C16 002D16 002E16 002F16 003016 003116 003216 003316 003416 003516 003616 003716 003816 003916 003A16 003B16 003C16 003D16 003E16 003F16 0EF616 0EF716 0EF816 0EF916 0EFA16 0EFB16 AD/DA control register (ADCON) A-D conversion register (low-order) (ADL) A-D conversion register (high-order) (ADH) PWM register (high-order) (PWMH) PWM register (low-order) (PWML) Baud rate generator (BRG) UART control register (UARTCON) Interrupt source switch register (IFR) Interrupt edge selection register (INTEDGE) CPU mode register (CPUM) Interrupt request register 1(IREQ1) Interrupt request register 2(IREQ2) Interrupt control register 1(ICON1) Interrupt control register 2(ICON2) Toff1 time set register (TOFF1) Toff2 time set register (TOFF2) FLD data pointer (FLDDP) Port P4 FLD/Port switch register (P4FPR) Port P5 FLD/Port switch register (P5FPR) Port P6 FLD/Port switch register (P6FPR) Serial I/O1 control register 1 (SIO1CON1) Serial I/O1 control register 2 (SIO1CON2) Serial I/O1 register/Transfer counter (SIO1) Serial I/O1 control register 3 (SIO1CON3) Serial I/O2 control register (SIO2CON) Serial I/O2 status register (SIO2STS) Serial I/O2 transmit/receive buffer register (TB/RB) Serial I/O3 control register (SIO3CON) Serial I/O3 register (SIO3) Watchdog timer control register (WDTCON) Pull-up control register 3 (PULL3) Pull-up control register 1 (PULL1) Pull-up control register 2 (PULL2) Port P0 digit output set switch register (P0DOR) Port P2 digit output set switch register (P2DOR) FLDC mode register (FLDM) Tdisp time set register (TDISP) 0EFC16 FLD output control register (FLDCON) 0EFD16 Buzzer output control register (BUZCON) 0EFE16 0EFF16 Flash memory control register (FCON) Flash command register (FCMD) Note: Flash memory version only. (Note) (Note) Fig. 9 Memory map of special function register (SFR) 13 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER I/O PORTS [Direction Registers] PiD The 38B7 group has 75 programmable I/O pins arranged in ten individual I/O ports (P1, P3, P4, P5, P6, P7, P8, P9, PA and PB). The I/O ports have direction registers which determine the input/ output direction of each individual pin. Each bit in a direction register corresponds to one pin, and each pin can be set to be input port or output port. When “0” is written to the bit corresponding to a pin, that pin becomes an input pin. When “1” is written to that pin, that pin becomes an output pin. If data is read from a pin set to output, the value of the port output latch is read, not the value of the pin itself. Pins set to input (the bit corresponding to that pin must be set to “0”) are floating and the value of that pin can be read. If a pin set to input is written to, only the port output latch is written to and the pin remains floating. [High-Breakdown-Voltage Output Ports] The 38B7 group has seven ports with high-breakdown-voltage pins (ports P0 to P5 and P60–P63 ). The high-breakdown-voltage ports have P-channel open-drain output with Vcc – 45 V of breakdown voltage. Each pin in ports P0 to P3 has an internal pull-down resistor connected to V EE. At reset, the P-channel output transistor of each port latch is turned off, so that it goes to VEE level (“L”) by the pull-down resistor. Writing “1” (weak drivability) to bit 7 of the FLDC mode register (address 0EF4 16) shows the rising transition of the output transistors for reducing transient noise. At reset, bit 7 of the FLDC mode register is set to “0” (strong drivability). [Pull-up Control Register] PULL Ports P6 4 –P6 7, P7, P80 –P8 3, P9, PA and PB have built-in programmable pull-up resistors. The pull-up resistors are valid only in the case that the each control bit is set to “1” and the corresponding port direction registers are set to input mode. b7 b0 b7 b0 Pull-up control register 1 (PULL1 : address 0EF016) P64, P65 pull-up control bit P66, P67 pull-up control bit P70, P71 pull-up control bit P72, P73 pull-up control bit P74, P75 pull-up control bit P76, P77 pull-up control bit Not used (returns “0” when read) (Do not write “1”.) 0: No pull-up 1: Pull-up Pull-up control register 2 (PULL2 : address 0EF116) P80, P81 pull-up control bit P82, P83 pull-up control bit Not used (returns “0” when read) (Do not write “1”.) P90, P91 pull-up control bit P92, P93 pull-up control bit P94, P95 pull-up control bit P96, P97 pull-up control bit Not used (returns “0” when read) (Do not write “1”.) 0: No pull-up 1: Pull-up b7 b0 Pull-up control register 3 (PULL3 : address 0EEF16) PA0, PA1 pull-up control bit PA2, PA3 pull-up control bit PA4, PA5 pull-up control bit PA6, PA7 pull-up control bit PB0, PB1 pull-up control bit PB2, PB3 pull-up control bit PB4, PB5 pull-up control bit PB6 pull-up control bit 0: No pull-up 1: Pull-up Fig. 10 Structure of pull-up control registers (PULL1, PULL2 and PULL3) 14 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Table 6 List of I/O port functions (1) Pin P00/FLD8 – P07/FLD15 Nama Port P0 Input/Output Output I/O Format High-breakdown voltage P-channel open-drain output with pull-down resistor Low-voltage input level High-breakdown voltage P-channel open-drain output with pull-down resistor High-breakdown voltage P-channel open-drain output with pull-down resistor Low-voltage input level High-breakdown voltage P-channel open-drain output with pull-down resistor Low-voltage input level High-breakdown voltage P-channel open-drain output Low-voltage input level High-breakdown voltage P-channel open-drain output Low-voltage input level High-breakdown voltage P-channel open-drain output Low-voltage input level (port input) CMOS compatible input level (RxD, S CLK21, SCLK22) CMOS 3-state output Non-Port Function FLD automatic display function Related SFRs FLDC mode register P0 digit output set switch register FLDC mode register Ref.No. (1) P10/FLD16 – P17/FLD23 Port P1 Input/output, individual bits (2) P20/FLD0 – P27/FLD7 Port P2 Output FLDC mode register P2 digit output set switch register FLDC mode register (1) P30/FLD24 – P37/FLD31 Port P3 Input/output, individual bits (2) P40/FLD32 – P47/FLD39 Port P4 Input/output, individual bits Input/output, individual bits Input/output, individual bits FLDC mode register Port P4 FLD/Port switch register FLDC mode register Port P5 FLD/Port switch register FLDC mode register Port P6 FLD/Port switch register FLD automatic display function Serial I/O2 function I/O FLDC mode register Serial I/O2 control register UART control register (2) P50/FLD40 – P57/FLD47 Port P5 (2) P60/FLD48 – P63/FLD51 Port P6 (2) P64/RxD/ FLD52 P65/TxD/ FLD53, P66/SCLK21/ FLD54 P67/SRDY2/ SCLK22/ FLD55 P70/INT0, P71/INT1 P72/INT2 (3) (4) (5) Port P7 Input/output, individual bits CMOS compatible input level CMOS 3-state output External interrput input Interrupt edge selection register Interrupt edge selection register Interrupt interval determination control register Interrupt edge selection register FLD output control register Timer 56 mode register Timer 12 mode register Timer 34 mode register Buzzer output control register Interrupt edge selection register CPU mode register Interrupt edge selection register (6) P73/INT3/ DIMOUT P74/PWM1 P75/T1 OUT P76/T3 OUT P77/INT4/ BUZ01 External interrput input Dimmer signal output PWM output Timer output Timer output Buzzer output External interrput input (7) (8) (9) P80/XCIN P81/XCOUT P82/CNTR1 P83/CNTR0/ CNTR2 Port P8 Input/output, individual bits CMOS compatible input level CMOS 3-state output Sub-clock generating circuit I/O External count input (10) (11) (6) (12) 15 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Table 7 List of I/O port functions (2) Pin Nama Input/Output P90/S IN3/ Port P9 Input/output, AN 8 individual bits P91/S OUT3/ AN 9, P92/S CLK3/ AN 10 P93/S RDY3/ AN 11 P94/RTP1/ AN 12, P95/RTP0/ AN 13 P96/PWM 0/ AN 14 P97/B UZ02/ AN 15 PA0/AN0– Port PA Input/output, PA7/AN7 individual bits PB 0/S CLK12/ DA Port PB Input/output, individual bits I/O Format CMOS compatible input level CMOS 3-state output Non-Port Function Serial I/O3 function I/O A-D conversion input Related SFRs Serial I/O3 control register AD/DA control register Ref.No. (6) (13) (14) Real time port output A-D conversion input Timer X mode register 2 AD/DA control register (15) CMOS compatible input level CMOS 3-state output CMOS compatible input level CMOS 3-state output PWM output A-D conversion input Buzzer output A-D conversion input A-D conversion input PWM control register AD/DA control register Buzzer output control register AD/DA control register AD/DA control register (16) (16) (17) Serial I/O1 function I/O D-A conversion output Serial I/O1 function I/O PB 1/S RDY1 PB 2/SBUSY1 PB 3/S STB1 PB 4/S CLK11 PB 5/S OUT1 PB 6/SIN1 Notes 1 : How to use double-function ports as function I/O ports, refer to the applicable sections. 2 : Make sure that the input level at each pin is either 0 V or Vcc during execution of the STP instruction. When an input level is at an intermediate potential, a current will flow from Vcc to Vss through the input-stage gate. Serial I/O1 control registers 1, 2 AD/DA control register Serial I/O1 control registers 1, 2 (18) (19) (18) (20) (21) (6) 16 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER (1) Ports P0, P2 (2) Ports P1, P3, P4, P5, P60 to P63 FLD/Port switch register P4, P5, P60 to P63 Dimmer signal (Note 1) Local data bus Data bus Port latch Output ✽ Dimmer signal (Note 1) Local data bus Data bus Direction register Port latch ✽ read VEE (Note 2) VEE (3) Port P64 Dimmer signal (Note 1) Pull-up control (4) Ports P65, P66 Pull-up control P-channel output disable signal (P65) Output OFF control signal Dimmer signal (Note 1) FLD/Port switch register FLD/Port switch register Local data bus Data bus Direction register Serial I/O2 selection signal Direction register Port latch Local data bus Data bus RxD input TxD or SCLK21 output Port latch Serial clock input P66 (5) Port P67 Dimmer signal (Note 1) Pull-up control (6) Ports P70 to P72, P82, P90, PB6 Pull-up control FLD/Port switch register Direction register Local data bus Data bus Direction register Data bus Port latch Port latch Serial ready output SRDY2 output enable bit Serial I/O2 enable bit Serial clock output Clock I/O pin selection bit Synchronous clock selection bit Serial clock input INT0, INT1, INT2 interrupt input CNTR1 input Serial I/O input A-D conversion input Analog input pin selection bit P90 ✽ High-breakdown-voltage P-channel transistor Notes 1: The dimmer signal sets the Toff timing. 2: A pull-down resistor is not built in to ports P4, P5 and P60 to P63. Fig. 11 Port block diagram (1) 17 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER (7) Port P73 Pull-up control Dimmer output control bit Direction register (8) Ports P74 to P76 Timer 1 output selection bit Timer 3 output selection bit Timer 6 output selection bit Pull-up control Direction register Data bus Port latch Data bus Port latch Dimmer signal output INT3 interrupt input Timer 1 output Timer 3 output Timer 6 output (9) Port P77 Pull-up control Buzzer control signal (10) Port P80 Pull-up control Port Xc switch bit Direction register Direction register Data bus Port latch Data bus Port latch Buzzer signal output INT4 interrupt input Sub-clock generating circuit input (11) Port P81 Pull-up control Port Xc switch bit (12) Port P83 Pull-up control Timer X operating mode bits Direction register Direction register Data bus Port latch Data bus Port latch Oscillator Port P80 Port Xc switch bit Timer X output CNTR0, CNTR2 input (13) Ports P91, P92 Pull-up control P-channel output disable signal (P91) Output OFF control signal Serial I/O3 selection signal Direction register (14) Port P93 Pull-up control SRDY3 output enable bit Direction register Data bus Port latch Data bus Port latch SOUT or SCLK Serial ready output Serial clock input P92 A-D conversion input A-D conversion input Analog input pin selection bits Analog input pin selection bits Fig. 12 Port block diagram (2) 18 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER (15) Ports P94, P95 Pull-up control Real time port control bit Direction register (16) Ports P96, P97 Pull-up control PWM output selection bit Buzzer control signal Direction register Data bus Port latch Data bus Port latch RTP output A-D conversion input PWM output Buzzer signal output A-D conversion input Analog input pin selection bits Analog input pin selection bits (17) Port PA Pull-up control (18) Ports PB0, PB2 Pull-up control Serial I/O1 selection signal PB1/SRDY1•PB2/SBUSY1 pin control bit Direction register Direction register Data bus Port latch Data bus Port latch SCLK12 output SBUSY1 output A-D conversion input Analog input pin selection bits Serial clock input SBUSY1 input D-A converter output D-A output enable bit PB0 (19) Port PB1 Pull-up control PB1/SRDY1•PB2/SBUSY1 pin control bit Direction register (20) Port PB3 Pull-up control PB3/SSTB1 pin control bit Direction register Data bus Port latch Data bus Port latch Serial ready output Serial ready input SSTB1 output (21) Ports PB4, PB5 Pull-up control P-channel output disable signal (PB5) Output OFF control signal Serial I/O1 selection signal Direction register Data bus Port latch SOUT or SCLK Serial clock input PB4 Fig. 13 Port block diagram (3) 19 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER INTERRUPTS Interrupts occur by twenty two sources: five external, sixteen internal, and one software. Interrupt Control Each interrupt except the BRK instruction interrupt has both an interrupt request bit and an interrupt enable bit, and is controlled by the interrupt disable flag. An interrupt occurs if the corresponding interrupt request and enable bits are “1” and the interrupt disable flag is “0.” Interrupt enable bits can be set or cleared by software. Interrupt request bits can be cleared by software, but cannot be set by software. The BRK instruction interrupt and reset cannot be disabled with any flag or bit. The I flag disables all interrupts except the BRK instruction interrupt and reset. If several interrupts requests occur at the same time, the interrupt with highest priority is accepted first. Interrupt Operation Upon acceptance of an interrupt the following operations are automatically performed: 1. The contents of the program counter and processor status register are automatically pushed onto the stack. 2. The interrupt disable flag is set and the corresponding interrupt request bit is cleared. 3. The interrupt jump destination address is read from the vector table into the program counter. Interrupt Source Selection Any of the following interrupt sources can be selected by the interrupt source switch register (address 003916). 1. INT 1 or Serial I/O3 2. INT 3 or Serial I/O2 transmit 3. INT 4 or A-D conversion sNote When the active edge of an external interrupt (INT0–INT4) is set or when switching interrupt sources in the same vector address, the corresponding interrupt request bit may also be set. Therefore, please take following sequence: (1) Disable the external interrupt which is selected. (2) Change the active edge in interrupt edge selection register (3) Clear the set interrupt request bit to “0.” (4) Enable the external interrupt which is selected. 20 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Table 8 Interrupt vector addresses and priority Interrupt Source Priority Reset (Note 2) INT0 INT1 1 2 3 Vector Addresses (Note 1) High FFFD16 FFFB16 FFF916 Low FFFC16 FFFA16 FFF816 Interrupt Request Generating Conditions At reset At detection of either rising or falling edge of INT0 input At detection of either rising or falling edge of INT1 input At completion of data transfer At detection of either rising or falling edge of INT2 input At 8-bit counter overflow 5 FFF516 FFF416 At completion of data transfer At completion of the last data transfer 6 7 8 9 10 11 12 13 14 FFF316 FFF116 FFEF16 FFED16 FFEB16 FFE916 FFE716 FFE516 FFE316 FFF216 FFF016 FFEE16 FFEC16 FFEA16 FFE816 FFE616 FFE416 FFE216 At timer X underflow At timer 1 underflow At timer 2 underflow At timer 3 underflow At timer 4 underflow At timer 5 underflow At timer 6 underflow At completion of serial I/O2 data receive At detection of either rising or falling edge of INT3 input At completion of serial I/O2 data transmit At detection of either rising or falling edge of INT4 input A-D conversion FLD blanking At completion of A-D conversion At falling edge of the last timing immediately before blanking period starts External interrupt (active edge selectable) Valid when INT3 interrupt is selected External interrupt (active edge selectable) Valid when INT4 interrupt is selected Valid when A-D conversion is selected Valid when FLD blanking interrupt is selected Valid when FLD digit interrupt is selected Non-maskable software interrupt Non-maskable External interrupt (active edge selectable) External interrupt (active edge selectable) Valid when INT1 interrupt is selected Valid when serial I/O3 is selected External interrupt (active edge selectable) Valid when interrupt interval determination is operating Valid when serial I/O ordinary mode is selected Valid when serial I/O automatic transfer mode is selected Remarks Serial I/O3 INT2 Remote control/ counter overflow Serial I/O1 Serial I/O automatic transfer Timer X Timer 1 Timer 2 Timer 3 Timer 4 Timer 5 Timer 6 Serial I/O2 receive INT3 4 FFF716 FFF616 STP release timer underflow Serial I/O2 transmit INT4 15 FFE116 FFE016 16 FFDF16 FFDE16 FLD digit At rising edge of digit (each timing) BRK instruction 17 FFDD16 FFDC16 At BRK instruction execution Notes 1 : Vector addresses contain interrupt jump destination addresses. 2 : Reset function in the same way as an interrupt with the highest priority. 21 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Interrupt request bit Interrupt enable bit Interrupt disable flag I BRK instruction Reset Interrupt request Fig. 14 Interrupt control b7 b0 Interrupt source switch register (IFR : address 003916) INT3/serial I/O2 transmit interrupt switch bit 0 : INT3 interrupt 1 : Serial I/O2 transmit interrupt INT4/AD conversion interrupt switch bit 0 : INT4 interrupt 1 : A-D conversion interrupt INT1/serial I/O3 interrupt switch bit 0 : INT1 interrupt 1 : Serial I/O3 interrupt Not used (return “0” when read) (Do not write “1” to these bits.) b7 b0 Interrupt edge selection register (INTEDGE : address 003A16) INT0 interrupt edge selection bit INT1 interrupt edge selection bit INT2 interrupt edge selection bit INT3 interrupt edge selection bit INT4 interrupt edge selection bit Not used (return “0” when read) CNTR0 pin edge switch bit CNTR1 pin edge switch bit 0 : Falling edge active 1 : Rising edge active 0 : Rising edge count 1 : Falling edge count b7 b0 Interrupt request register 2 (IREQ2 : address 003D16) Timer 4 interrupt request bit Timer 5 interrupt request bit Timer 6 interrupt request bit Serial I/O2 receive interrupt request bit INT3/serial I/O2 transmit interrupt request bit INT4 interrupt request bit AD conversion interrupt request bit FLD blanking interrupt request bit FLD digit interrupt request bit Not used (returns “0” when read) 0 : No interrupt request issued 1 : Interrupt request issued b7 b0 Interrupt control register 2 (ICON2 : address 003F16) Timer 4 interrupt enable bit Timer 5 interrupt enable bit Timer 6 interrupt enable bit Serial I/O2 receive interrupt enable bit INT3/serial I/O2 transmit interrupt enable bit INT4 interrupt enable bit AD conversion interrupt enable bit FLD blanking interrupt enable bit FLD digit interrupt enable bit Not used (returns “0” when read) (Do not write “1” to this bit.) 0 : Interrupt disabled 1 : Interrupt enabled b7 b0 Interrupt request register 1 (IREQ1 : address 003C16) INT0 interrupt request bit INT1 interrupt request bit Serial I/O3 interrupt request bit INT2 interrupt request bit Remote controller/counter overflow interrupt request bit Serial I/O1 interrupt request bit Serial I/O automatic transfer interrupt request bit Timer X interrupt request bit Timer 1 interrupt request bit Timer 2 interrupt request bit Timer 3 interrupt request bit b7 b0 Interrupt control register 1 (ICON1 : address 003E16) INT0 interrupt enable bit INT1 interrupt enable bit Serial I/O3 interrupt enable bit INT2 interrupt enable bit Remote controller/counter overflow interrupt enable bit Serial I/O1 interrupt enable bit Serial I/O automatic transfer interrupt enable bit Timer X interrupt enable bit Timer 1 interrupt enable bit Timer 2 interrupt enable bit Timer 3 interrupt enable bit Fig. 15 Structure of interrupt related registers 22 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER TIMERS 8-Bit Timer The 38B7 group has six built-in 8-bit timers : Timer 1, Timer 2, Timer 3, Timer 4, Timer 5, and Timer 6. Each timer has the 8-bit timer latch. All timers are down-counters. When the timer reaches “00 16”, an underflow occurs with the next count pulse. Then the contents of the timer latch is reloaded into the timer and the timer continues down-counting. When a timer underflows, the interrupt request bit corresponding to that timer is set to “1”. The count can be stopped by setting the stop bit of each timer to “1”. The internal system clock can be set to either the high-speed mode or low-speed mode with the CPU mode register. At the same time, the timer internal count source is switched to either f(XIN) or f(XCIN). qTimer 1, Timer 2 The count sources of timer 1 and timer 2 can be selected by setting the timer 12 mode register. A rectangular waveform of timer 1 underflow signal divided by 2 can be output from the P7 5/T1OUT pin. The active edge of the external clock CNTR 0 can be switched with the bit 6 of the interrupt edge selection register. At reset or when executing the STP instruction, all bits of the timer 12 mode register are cleared to “0”, timer 1 is set to “FF 16”, and timer 2 is set to “0116”. qTimer 3, Timer 4 The count sources of timer 3 and timer 4 can be selected by setting the timer 34 mode register. A rectangular waveform of timer 3 underflow signal divided by 2 can be output from the P7 6/T3OUT pin. The active edge of the external clock CNTR 1 can be switched with the bit 7 of the interrupt edge selection register. qTimer 5, Timer 6 The count sources of timer 5 and timer 6 can be selected by setting the timer 56 mode register. A rectangular waveform of timer 6 underflow signal divided by 2 can be output from the P7 4/PWM1 pin. b7 b0 Timer 12 mode register (T12M: address 002816) Timer 1 count stop bit 0 : Count operation 1 : Count stop Timer 2 count stop bit 0 : Count operation 1 : Count stop Timer 1 count source selection bits 00 : f(XIN)/8 or f(XCIN)/16 01 : f(XCIN) 10 : f(XIN)/16 or f(XCIN)/32 11 : f(XIN)/64 or f(XCIN)/128 Timer 2 count source selection bits 00 : Underflow of Timer 1 01 : f(XCIN) 10 : External count input CNTR0 11 : Not available Timer 1 output selection bit (P75) 0 : I/O port 1 : Timer 1 output Not used (returns “0” when read) (Do not write “1” to this bit.) b7 b0 Timer 34 mode register (T34M: address 002916) Timer 3 count stop bit 0 : Count operation 1 : Count stop Timer 4 count stop bit 0 : Count operation 1 : Count stop Timer 3 count source selection bits 00 : f(XIN)/8 or f(XCIN)/16 01 : Underflow of Timer 2 10 : f(XIN)/16 or f(XCIN)/32 11 : f(XIN)/64 or f(XCIN)/128 Timer 4 count source selection bits 00 : f(XIN)/8 or f(XCIN)/16 01 : Underflow of Timer 3 10 : External count input CNTR1 11 : Not available Timer 3 output selection bit (P76) 0 : I/O port 1 : Timer 3 output Not used (returns “0” when read) (Do not write “1” to this bit.) b7 b0 qTimer 6 PWM1 Mode Timer 6 can output a PWM rectangular waveform with “H” duty cycle n/(n+m) from the P74/PWM1 pin by setting the timer 56 mode register (refer to Figure 18). The n is the value set in timer 6 latch (address 0025 16) and m is the value in the timer 6 PWM register (address 0027 16). If n is “0,” the PWM output is “L”, if m is “0”, the PWM output is “H” (n = 0 is prior than m = 0). In the PWM mode, interrupts occur at the rising edge of the PWM output. Timer 56 mode register (T56M: address 002A16) Timer 5 count stop bit 0 : Count operation 1 : Count stop Timer 6 count stop bit 0 : Count operation 1 : Count stop Timer 5 count source selection bit 0 : f(XIN)/8 or f(XCIN)/16 1 : Underflow of Timer 4 Timer 6 operation mode selection bit 0 : Timer mode 1 : PWM mode Timer 6 count source selection bits 00 : f(XIN)/8 or f(XCIN)/16 01 : Underflow of Timer 5 10 : Underflow of Timer 4 11 : Not available Timer 6 (PWM) output selection bit (P74) 0 : I/O port 1 : Timer 6 output Not used (returns “0” when read) (Do not write “1” to this bit.) Fig. 16 Structure of timer related registers 23 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Data bus XCIN 1/2 “1” XIN “0” Internal system clock selection bit Timer 1 latch (8) RESET STP instruction Timer 1 interrupt request Timer 1 count source Timer 1 (8) “01” selection bits “00” “10” “11” FF16 1/8 1/16 1/64 Timer 1 count stop bit P75/T1OUT P75 latch 1/2 Timer 1 output selection bit Timer 2 latch (8) Timer 2 count source selection bits Timer 2 (8) P75 direction register “00” “01” “10” CNTR0 P83/CNTR0/CNTR2 Rising/Falling active edge switch 0116 Timer 2 interrupt request Timer 2 count stop bit CNTR2 Timer 3 latch (8) Timer 3 count source selection bits Timer 3 (8) Timer 3 count stop bit Timer 3 interrupt request “01” “00” P76/T3OUT P76 latch “10” “11” 1/2 Timer 3 output selection bit Timer 4 latch (8) “01” P76 direction register Timer 4 count source selection bits Timer 4 (8) Timer 4 count stop bit Timer 4 interrupt request “00” “10” P82/CNTR1 Rising/Falling active edge switch Timer 5 latch (8) “1” “0” Timer 5 count source selection bit Timer 5 (8) Timer 5 count stop bit Timer 5 interrupt request Timer 6 latch (8) “01” “00” “10” Timer 6 count source selection bits Timer 6 (8) Timer 6 count stop bit Timer 6 interrupt request Timer 6 PWM register (8) P74/PWM1 P74 latch “1” “0” Timer 6 output selection bit PWM 1/2 Timer 6 operation mode selection bit P74 direction register Fig. 17 Block diagram of timer 24 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER ts Timer 6 count source Timer 6 PWM mode n ✕ ts m ✕ ts (n+m) ✕ ts Timer 6 interrupt request Timer 6 interrupt request Note: PWM waveform (duty : n/(n + m) and period: (n + m) ✕ ts) is output. n : setting value of Timer 6 m: setting value of Timer 6 PWM register ts: period of Timer 6 count source Fig. 18 Timing chart of timer 6 PWM1 mode 25 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER 16-Bit Timer Timer X is a 16-bit timer that can be selected in one of four modes by the Timer X mode registers 1, 2 and can be controlled for the timer X write and the real time port by setting the timer X mode registers. Read and write operation on 16-bit timer must be performed for both high- and low-order bytes. When reading a 16-bit timer, read from the high-order byte first. When writing to 16-bit timer, write to the loworder byte first. The 16-bit timer cannot perform the correct operation when reading during write operation, or when writing during read operation. qTimer X Timer X is a down-counter. When the timer reaches “000016”, an underflow occurs with the next count pulse. Then the contents of the timer latch is reloaded into the timer and the timer continues downcounting. When a timer underflows, the interrupt request bit corresponding to that timer is set to “1”. (1) Timer mode A count source can be selected by setting the Timer X count source selection bits (bits 1 and 2) of the Timer X mode register 1. (2) Pulse output mode Each time the timer underflows, a signal output from the CNTR2 pin is inverted. Except for this, the operation in pulse output mode is the same as in timer mode. When using a timer in this mode, set the port shared with the CNTR2 pin to output. (3) Event counter mode The timer counts signals input through the CNTR2 pin. Except for this, the operation in event counter mode is the same as in timer mode. When using a timer in this mode, set the port shared with the CNTR2 pin to input. (4) Pulse width measurement mode A count source can be selected by setting the Timer X count source selection bits (bits 1 and 2) of the Timer X mode register 1. When CNTR2 active edge switch bit is “0”, the timer counts while the input signal of the CNTR2 pin is at “H”. When it is “1”, the timer counts while the input signal of the CNTR2 pin is at “L”. When using a timer in this mode, set the port shared with the CNTR2 pin to input. s Note •Timer X Write Control If the timer X write control bit is “0”, when the value is written in the address of timer X, the value is loaded in the timer X and the latch at the same time. If the timer X write control bit is “1”, when the value is written in the address of timer X, the value is loaded only in the latch. The value in the latch is loaded in timer X after timer X underflows. When the value is written in latch only, unexpected value may be set in the high-order counter if the writing in high-order latch and the underflow of timer X are performed at the same timing. •Real Time Port Control While the real time port function is valid, data for the real time port are output from ports P94 and P95 each time the timer X underflows. (However, if the real time port control bit is changed from “0” to “1”, data are output independent of the timer X.) When the data for the real time port is changed while the real time port function is valid, the changed data are output at the next underflow of timer X. Before using this function, set the corresponding port direction registers to output mode. 26 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Real time port control bit “1” P94 Data bus QD P94 data for real time port Real time port control bit (P94) “0” “1” Timer X mode register write signal “0” Latch P94 direction register P94 latch Real time port control bit “1” QD P95 “0 ” Latch P95 direction register P95 latch P95 data for real time port Real time port control bit (P95) “0” “1 ” XCIN “1 ” XIN 1/2 Timer X mode register write signal “0” P83/CNTR0/CNTR2 Internal system clock selection bit 1/2 Count source selection bit 1/8 1/64 Timer X stop Timer X write control bit control bit Timer X operating mode bits CNTR2 active Timer X latch (low-order) (8) Timer X latch (high-order) (8) edge switch bit “00”,“01”,“11” “0 ” Divider Timer X (low-order) (8) Timer X (high-order) (8) “10” “1 ” Pulse width measurement mode CNTR2 active edge switch bit “0” Q P83 direction register “1” P83 latch Q Timer X interrupt request Pulse output mode S T Pulse output mode CNTR0 Fig. 19 Block diagram of timer X b7 b6 b5 b4 b3 b2 b1 b0 b7 b6 b5 b4 b3 b2 b1 b0 Timer X mode register 1 (TXM1 : address 002E16) Timer X write control bit 0 : Write data to both timer latch and timer 1 : Write data to timer latch only Timer X count source selection bits b2 b1 0 0 : f(XIN)/2 or f(XCIN)/4 0 1 : f(XIN)/8 or f(XCIN)/16 1 0 : f(XIN)/64 or f(XCIN)/128 1 1 : Not available Not used (returns “0” when read) Timer X operating mode bits b5 b4 0 0 : Timer mode 0 1 : Pulse output mode 1 0 : Event counter mode 1 1 : Pulse width measurement mode CNTR2 active edge switch bit 0 : • Event counter mode ; counts rising edges • Pulse output mode ; output starts with “H” level • Pulse width measurement mode ; measures “H” periods 1 : • Event counter mode ; counts falling edges • Pulse output mode ; output starts with “L” level • Pulse width measurement mode ; measures “L” periods Timer X stop control bit 0 : Count operating 1 : Count stop Timer X mode register 2 (TXM2 : address 002F16) Real time port control bit (P94) 0 : Real time port function is invalid 1 : Real time port function is valid Real time port control bit (P95) 0 : Real time port function is invalid 1 : Real time port function is valid P94 data for real time port P95 data for real time port Not used (returns “0” when read) Fig. 20 Structure of timer X related registers 27 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER SERIAL I/O Serial I/O1 Serial I/O1 is used as the clock synchronous serial I/O and has an ordinary mode and an automatic transfer mode. In the automatic transfer mode, serial transfer is performed through the serial I/O automatic transfer RAM which has up to 256 bytes (addresses 0F0016 to 0FFF16). The PB 1 /SRDY1, PB 2/SBUSY1 , and PB3/S STB1 pins each have a handshake I/O signal function and can select either “H” active or “L” active for active logic. Main address bus Local address bus Serial I/O automatic transfer RAM (0F0016 to 0FFF16) Main Local data bus data bus Address decoder Serial I/O1 automatic transfer data pointer Serial I/O1 automatic transfer controller XCIN 1/2 Internal system clock selection bit “1 ” “0 ” Serial I/O1 control register 3 1/4 1/8 1/16 1/32 1/64 1/128 1/256 XIN “0 ” (PB3/SSTB1 pin control bit) PB3/SSTB1 “1 ” PB1/SRDY1•PB2/SBUSY1 PB2 latch pin control bit “0 ” PB2/SBUSY1 “1 ” PB1/SRDY1•PB2/SBUSY1 PB1 latch pin control bit “0 ” Serial I/O1 synchronous clock selection bit “0” Synchronous circuit SCLK1 “1” Serial I/O1 clock pin selection bit PB1/SRDY1 “1 ” “0 ” “1 ” Divider PB3 latch Internal synchronous clock selection bits Serial transfer status flag PB4 latch “0 ” Serial I/O1 interrupt request PB4/SCLK11 “1 ” “1 ” “0 ” Serial I/O1 counter “1 ” Serial I/O1 clock pin selection bits PB0/SCLK12 “0 ” PB0 latch “0 ” PB5/SOUT1 PB5 latch “1” Serial transfer selection bits PB6/SIN1 Serial I/O1 register (8) Fig. 21 Block diagram of serial I/O1 28 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER b7 b6 b5 b4 b3 b2 b1 b0 Serial I/O1 control register 1 (SIO1CON1 (SC11): address 001916) Serial transfer selection bits b1 b0 0 0 : Serial I/O disabled (pins PB0 to PB6 are I/O ports) 0 1 : 8-bit serial I/O 1 0 : Not available 1 1 : Automatic transfer serial I/O (8-bits) Serial I/O1 synchronous clock selection bits (PB3/SSTB1 pin control bit) b3 b2 0 0 : Internal synchronous clock (PB3 pin is an I/O port.) 0 1 : External synchronous clock (PB3 pin is an I/O port.) 1 0 : Internal synchronous clock (PB3 pin is an SSTB1 output.) 1 1 : Internal synchronous clock (PB3 pin is an SSTB1 output.) Serial I/O initialization bit 0: Serial I/O initialization 1: Serial I/O enabled Transfer mode selection bit 0: Full duplex (transmit and receive) mode (PB6 pin is an SIN1 input.) 1: Transmit-only mode (PB6 pin is an I/O port.) Transfer direction selection bit 0: LSB first 1: MSB first Serial I/O1 clock pin selection bit 0:SCLK11 (PB0/SCLK12 pin is an I/O port.) 1:SCLK12 (PB4/SCLK11 pin is an I/O port.) b7 b6 b5 b4 b3 b2 b1 b0 Serial I/O1 control register 2 (SIO1CON2 (SC12): address 001A16) PB1/SRDY1 • PB2/SBUSY1 pin control bits b3b2b1b0 0 0 0 0: Pins PB1 and PB2 are I/O ports 0 0 0 1: Not used 0 0 1 0: PB1 pin is an SRDY1 output, PB2 pin is an I/O port. 0 0 1 1: PB1 pin is an SRDY1 output, PB2 pin is an I/O port. 0 1 0 0: PB1 pin is an I/O port, PB2 pin is an SBUSY1 input. 0 1 0 1: PB1 pin is an I/O port, PB2 pin is an SBUSY1 input. 0 1 1 0: PB1 pin is an I/O port, PB2 pin is an SBUSY1 output. 0 1 1 1: PB1 pin is an I/O port, PB2 pin is an SBUSY1 output. 1 0 0 0: PB1 pin is an SRDY1 input, PB2 pin is an SBUSY1 output. 1 0 0 1: PB1 pin is an SRDY1 input, PB2 pin is an SBUSY1 output. 1 0 1 0: PB1 pin is an SRDY1 input, PB2 pin is an SBUSY1 output. 1 0 1 1: PB1 pin is an SRDY1 input, PB2 pin is an SBUSY1 output. 1 1 0 0: PB1 pin is an SRDY1 output, PB2 pin is an SBUSY1 input. 1 1 0 1: PB1 pin is an SRDY1 output, PB2 pin is an SBUSY1 input. 1 1 1 0: PB1 pin is an SRDY1 output, PB2 pin is an SBUSY1 input. 1 1 1 1: PB1 pin is an SRDY1 output, PB2 pin is an SBUSY1 input. SBUSY1 output • SSTB1 output function selection bit (Valid in automatic transfer mode) 0: Functions as each 1-byte signal 1: Functions as signal for all transfer data Serial transfer status flag 0: Serial transfer completion 1: Serial transferring SOUT1 pin control bit (at no-transfer serial data) 0: Output active 1: Output high-impedance PB5/SOUT1 P-channel output disable bit 0: CMOS 3-state (P-channel output is valid.) 1: N-channel open-drain (P-channel output is invalid.) Fig. 22 Structure of serial I/O1 control registers 1, 2 29 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER (1) Serial I/O1 operation Either the internal synchronous clock or external synchronous clock can be selected by the serial I/O1 synchronous clock selection bits (b2 and b3 of address 0019 16) of serial I/O1 control register 1 as synchronous clock for serial transfer. The internal synchronous clock has a built-in dedicated divider where 7 different clocks are selected by the internal synchronous clock selection bits (b5, b6 and b7 of address 001C16) of serial I/O1 control register 3. The PB1/S RDY1, PB2/S BUSY1, and PB3 /SSTB1 pins each select either I/O port or handshake I/O signal by the serial I/O1 synchronous clock selection bits (b2 and b3 of address 001916) of serial I/O1 control register 1 as well as the PB 1/S RDY1 • P B2 / SBUSY1 p in control bits (b0 to b3 of address 001A 16) of serial I/O1 control register 2. For the SOUT 1 being used as an output pin, either CMOS output or N-channel open-drain output is selected by the PB5/S OUT1 Pchannel output disable bit (b7 of address 001A 16) of serial I/O1 control register 2. Either output active or high-impedance can be selected as a SOUT1 pin state at serial non-transfer by the SOUT1 pin control bit (b6 of address 001A16 ) of serial I/O1 control register 2. However, when the external synchronous clock is selected, perform the following setup to put the SOUT1 pin into a high-impedance state: When the SCLK1 input is “H” after completion of transfer, set the SOUT1 pin control bit to “1”. When the S CLK1 input goes to “L” after the start of the next serial transfer, the SOUT1 pin control bit is automatically reset to “0” and put into an output active state. Regardless of whether the internal synchronous clock or external synchronous clock is selected, the full duplex mode and the transmit-only mode are available for serial transfer, one of which is selected by the transfer mode selection bit (b5 of address 0019 16) of serial I/O1 control register 1. Either LSB first or MSB first is selected for the I/O sequence of the serial transfer bit strings by the transfer direction selection bit (b6 of address 0019 16) of serial I/O1 control register 1. When using serial I/O1, first select either 8-bit serial I/O or automatic transfer serial I/O by the serial transfer selection bits (b0 and b1 of address 0019 16 ) of serial I/O1 control register 1, after completion of the above bit setup. Next, set the serial I/O initialization bit (b4 of address 001916 ) of serial I/O1 control register 1 to “1” (Serial I/O enable) . When stopping serial transfer while data is being transferred, regardless of whether the internal or external synchronous clock is selected, reset the serial I/O initialization bit (b4) to “0”. b7 b6 b5 b4 b3 b2 b1 b0 Serial I/O1 control register 3 (SIO1CON3 (SC13): address 001C16) Automatic transfer interval set bits b4b3b2b1b0 0 0 0 0 0: 2 cycles of transfer clocks 0 0 0 0 1: 3 cycles of transfer clocks : 1 1 1 1 0: 32 cycles of transfer clocks 1 1 1 1 1: 33 cycles of transfer clocks Data is written to a latch and read from a decrement counter. Internal synchronous clock selection bits b7b6b5 0 0 0: f(XIN)/4 or f(XCIN)/8 0 0 1: f(XIN)/8 or f(XCIN)/16 0 1 0: f(XIN)/16 or f(XCIN)/32 0 1 1: f(XIN)/32 or f(XCIN)/64 1 0 0: f(XIN)/64 or f(XCIN)/128 1 0 1: f(XIN)/128 or f(XCIN)/256 1 1 0: f(XIN)/256 or f(XCIN)/512 Fig. 23 Structure of serial I/O1 control register 3 30 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER (2) 8-bit serial I/O mode Address 001B 16 is assigned to the serial I/O1 register. When the internal synchronous clock is selected, a serial transfer of the 8-bit serial I/O is started by a write signal to the serial I/O1 register (address 001B 16). The serial transfer status flag (b5 of address 001A16 ) of serial I/O1 control register 2 indicates the shift register status of serial I/O1, and is set to “1” by writing into the serial I/O1 register, which becomes a transfer start trigger and reset to “0” after completion of 8-bit transfer. At the same time, a serial I/O1 interrupt request occurs. When the external synchronous clock is selected, the contents of the serial I/O1 register are continuously shifted while transfer clocks are input to S CLK1. Therefore, the clock needs to be controlled externally. (3) Automatic transfer serial I/O mode The serial I/O1 automatic transfer controller controls the write and read operations of the serial I/O1 register, so that the function of address 001B 16 is used as a transfer counter (1-byte unit). When performing serial transfer through the serial I/O automatic transfer RAM (addresses 0F0016 to 0FFF16 ), it is necessary to set the serial I/O1 automatic transfer data pointer (address 001816) beforehand. Input the low-order 8 bits of the first data store address to be serially transferred to the automatic transfer data pointer set bits. When the internal synchronous clock is selected, the transfer interval for each 1-byte data can be set by the automatic transfer interval set bits (b0 to b4 of address 001C 16) of serial I/O1 control register 3 in the following cases: 1. When using no handshake signal 2. When using the S RDY1 output, S BUSY1 output, and S STB1 output of the handshake signal independently 3. When using a combination of S RDY1 output and SSTB1 output or a combination of S BUSY1 output and S STB1 output of the handshake signal. It is possible to select one of 32 different values, namely 2 to 33 cycles of the transfer clock, as a setting value. When using the S BUSY1 output and selecting the SBUSY1 output • SSTB1 output function selection bit (b4 of address 001A16 ) of serial I/O1 control register 2 as the signal for all transfer data, provided that the automatic transfer interval setting is valid, a transfer interval is placed before the start of transmission/reception of the first data and after the end of transmission/reception of the last data. For SSTB1 output, regardless of the contents of the SBUSY1 output • SSTB1 output function selection bit (b4), the transfer interval for each 1-byte data is longer than the set value by 2 cycles. Furthermore, when using a combination of SBUSY1 o utput and SSTB1 output as a signal for all transfer data, the transfer interval after the end of transmission/reception of the last data is longer than the set value by 2 cycles. When the external synchronous clock is selected, automatic transfer interval setting is disabled. After completion of the above bit setup, if the internal synchronous clock is selected, automatic serial transfer is started by writing the value of “number of transfer bytes – 1” into the transfer counter (address 001B16 ). When the external synchronous clock is selected, write the value of “number of transfer bytes – 1” into the transfer counter and keep an internal system clock interval of 5 cycles or more. After that, input transfer clock to SCLK1. As a transfer interval for each 1-byte data transfer, keep an internal system clock interval of 5 cycles or more from the clock rise time of the last bit. Regardless of whether the internal or external synchronous clock is selected, the automatic transfer data pointer and the transfer counter are decremented after each 1-byte data is received and then written into the automatic transfer RAM. The serial transfer status flag (b5 of address 001A 16) is set to “1” by writing data into the transfer counter. Writing data becomes a transfer start trigger, and the serial transfer status flag is reset to “0” after the last data is written into the automatic transfer RAM. At the same time, a serial I/O1 interrupt request occurs. The values written in the automatic transfer data pointer set bits (b0 to b7 of address 001816) and the automatic transfer interval set bits (b0 to b4 of address 001C 16) are held in the latch. When data is written into the transfer counter, the values latched in the automatic transfer data pointer set bits (b0 to b7) and the automatic transfer interval set bits (b0 to b4) are transferred to the decrement counter. b7 b0 Serial I/O1 automatic transfer data pointer (SIO1DP: address 001816) Automatic transfer data pointer set bits Specify the low-order 8 bits of the first data store address on the serial I/O automatic transfer RAM. Data is written into the latch and read from the decrement counter. Fig. 24 Structure of serial I/O1 automatic transfer data pointer 31 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Automatic transfer RAM FFF16 Automatic transfer data pointer 5216 F5216 F5116 F5016 F4F16 F4E16 Transfer counter 0416 F0016 SIN1 Serial I/O1 register SOUT1 Fig. 25 Automatic transfer serial I/O operation 32 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER (4) Handshake signal 1. S STB1 output signal The S STB1 output is a signal to inform an end of transmission/reception to the serial transfer destination . The SSTB1 output signal can be used only when the internal synchronous clock is selected. In the initial status, namely, in the status in which the serial I/O initialization bit (b4) is reset to “0”, the S STB1 output goes to “L”, or the S STB1 output goes to “H”. At the end of transmit/receive operation, when the data of the serial I/O1 register is all output from S OUT1, pulses are output in the period of 1 cycle of the transfer clock so as to cause the S STB1 output to go “ H ” o r the S STB1 o utput to go “ L ” . After that, each pulse is returned to the initial status in which SSTB1 output goes to “L” or the SSTB1 output goes to “H”. Furthermore, after 1 cycle, the serial transfer status flag (b5) is reset to “0”. In the automatic transfer serial I/O mode, whether the SSTB1 output is to be active at an end of each 1-byte data or after completion of transfer of all data can be selected by the S BUSY1 output • SSTB1 output function selection bit (b4 of address 001A16) of serial I/O1 control register 2. 2. S BUSY1 input signal The S BUSY1 input is a signal which receives a request for a stop of transmission/reception from the serial transfer destination. When the internal synchronous clock is selected, input an “ H ” level signal into the S BUSY1 input and an “L” level signal into the SBUSY1 input in the initial status in which transfer is stopped. When starting a transmit/receive operation, input an “L” level signal into the SBUSY1 input and an “H” level signal into the SBUSY1 input in the period of 1.5 cycles or more of the transfer clock. Then, transfer clocks are output from the S CLK1 output. When an “H” level signal is input into the S BUSY1 input and an “L” level signal into the SBUSY1 input after a transmit/receive operation is started, this transmit/receive operation are not stopped immediately and the transfer clocks from the S CLK1 output is not stopped until the specified number of bits are transmitted and received. The handshake unit of the 8-bit serial I/O is 8 bits and that of the automatic transfer serial I/O is 8 bits. When the external synchronous clock is selected, input an “ H ” level signal into the S BUSY1 input and an “L” level signal into the S BUSY1 input in the initial status in which transfer is stopped. At this time, the transfer clocks to be input in SCLK1 become invalid. During serial transfer, the transfer clocks to be input in SCLK1 become valid, enabling a transmit/receive operation, while an “L” level signal is input into the S BUSY1 input and an “H” level signal is input into the S BUSY1 input. When changing the input values in the S BUSY1 i nput and the SBUSY1 input at these operations, change them when the S CLK1 input is in a high state. When the high impedance of the SOUT1 output is selected by the SOUT1 pin control bit (b6), the SOUT1 output becomes active, enabling serial transfer by inputting a transfer clock to S CLK1, while an “L” level signal is input into the S BUSY1 input and an “H” level signal is input into the S BUSY1 input. SSTB1 Serial transfer status flag SCLK1 SOUT1 Fig. 26 SSTB1 output operation SBUSY1 SCLK1 SOUT1 Fig. 27 SBUSY1 input operation (internal synchronous clock) SBUSY1 SCLK1 Invalid SOUT1 (Output high-impedance) Fig. 28 SBUSY1 input operation (external synchronous clock) 3. SBUSY1 output signal The SBUSY1 output is a signal which requests a stop of transmission/reception to the serial transfer destination. In the automatic transfer serial I/O mode, regardless of the internal or external synchronous clock, whether the S BUSY1 o utput is to be active at transfer of each 1-byte data or during transfer of all data can be selected by the S BUSY1 output • SSTB1 output function selection bit (b4). In the initial status, the status in which the serial I/O initialization bit (b4) is reset to “ 0 ” , the S BUSY1 o utput goes to “ H ” a nd the SBUSY1 output goes to “L”. 33 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER When the internal synchronous clock is selected, in the 8-bit serial I/O mode and the automatic transfer serial I/O mode (SBUSY1 output function outputs in 1-byte units), the SBUSY1 output goes to “L” and the SBUSY1 output goes to “H” before 0.5 cycle (transfer clock) of the timing at which the transfer clock from the S CLK1 o utput goes to “L” at a start of transmit/receive operation. In the automatic transfer serial I/O mode (the SBUSY1 output function outputs all transfer data), the SBUSY1 output goes to “L” and the SBUSY1 output goes to “H” when the first transmit data is written into the serial I/O1 register (address 001B16 ). When the external synchronous clock is selected, the SBUSY1 output goes to “L” and the SBUSY1 output goes to “H” when transmit data is written into the serial I/O1 register to start a transmit operation, regardless of the serial I/O transfer mode. At termination of transmit/receive operation, the SBUSY1 output returns to “H” and the SBUSY1 output returns to “L”, the initial status, when the serial transfer status flag is set to “ 0 ” , regardless of whether the internal or external synchronous clock is selected. Furthermore, in the automatic transfer serial I/O mode (S BUSY1 output function outputs in 1-byte units), the S BUSY1 output goes to “H” and the SBUSY1 output goes to “L” each time 1-byte of receive data is written into the automatic transfer RAM. SBUSY1 Serial transfer status flag SBUSY1 Serial transfer status flag SCLK1 SCLK1 Write to Serial I/O1 register Fig. 30 SBUSY1 output operation (external synchronous clock, 8-bit serial I/O) SOUT1 Fig. 29 SBUSY1 output operation (internal synchronous clock, 8-bit serial I/O) Automatic transfer interval SCLK1 Serial I/O1 register →Automatic transfer RAM Automatic transfer RAM →Serial I/O1 register SBUSY1 Serial transfer status flag SOUT1 Fig. 31 SBUSY1 output operation in automatic transfer serial I/O mode (internal synchronous clock, SBUSY1 output function outputs each 1-byte) 34 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER 4. S RDY1 output signal The SRDY1 o utput is a transmit/receive enable signal which informs the serial transfer destination that transmit/receive is ready. In the initial status, when the serial I/O initialization bit (b4) is reset to “0”, the SRDY1 output goes to “L” and the SRDY1 output goes to “H”. After transmitted data is stored in the serial I/O1 register (address 001B 16) and a transmit/receive operation becomes ready, the SRDY1 output goes to “H” and the SRDY1 output goes to “L”. When a transmit/receive operation is started and the transfer clock goes to “L”, the S RDY1 output goes to “L” and the S RDY1 output goes to “H”. 5. S RDY1 input signal The SRDY1 input signal becomes valid only when the SRDY1 input and the S BUSY1 output are used. The SRDY1 input is a signal for receiving a transmit/receive ready completion signal from the serial transfer destination. When the internal synchronous clock is selected, input a low level signal into the S RDY1 input and a high level signal into the SRDY1 input in the initial status in which the transfer is stopped. When an “H” level signal is input into the S RDY1 input and an “L” level signal is input into the SRDY1 input for a period of 1.5 cycles or more of transfer clock, transfer clocks are output from the SCLK1 output and a transmit/receive operation is started. After the transmit/receive operation is started and an “L” level signal is input into the S RDY1 input and an “H” level signal into the SRDY1 input, this operation cannot be immediately stopped. After the specified number of bits are transmitted and received, the transfer clocks from the SCLK1 output is stopped. The handshake unit of the 8-bit serial I/O and that of the automatic transfer serial I/O are of 8 bits. When the external synchronous clock is selected, the S RDY1 input becomes one of the triggers to output the S BUSY1 signal. To start a transmit/receive operation (SBUSY1 output: “L”, S BUSY1 output: “H”), input an “H” level signal into the S RDY1 input and an “L” level signal into the SRDY1 input, and also write transmit data into the serial I/O1 register. SRDY1 SCLK1 Write to serial I/O1 register Fig. 32 SRDY1 output operation SRDY1 SCLK1 SOUT1 Fig. 33 SRDY1 input operation (internal synchronous clock) 35 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER SCLK1 SRDY1 SBUSY1 SCLK1 SRDY1 SBUSY1 A: Write to serial I/O1 register SRDY1 SBUSY1 A: Internal synchronous clock selection B: External synchronous clock selection SCLK1 B: Write to serial I/O1 register Fig. 34 Handshake operation at serial I/O1 mutual connecting (1) SCLK1 SRDY1 SBUSY1 SCLK1 SRDY1 SBUSY1 A: Write to serial I/O1 register SRDY1 SBUSY1 A: Internal synchronous clock selection B: External synchronous clock selection SCLK1 B: Write to serial I/O1 register Fig. 35 Handshake operation at serial I/O1 mutual connecting (2) 36 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Serial I/O2 Serial I/O2 can be used as either clock synchronous or asynchronous (UART) serial I/O. A dedicated timer (baud rate generator) is also provided for baud rate generation during serial I/O2 operation. (1) Clock synchronous serial I/O mode The clock synchronous serial I/O mode can be selected by setting the serial I/O2 mode selection bit (b6) of the serial I/O2 control register (address 001D16 ) to “1”. For clock synchronous serial I/O, the transmitter and the receiver must use the same clock for serial I/O2 operation. If an internal clock is used, transmit/receive is started by a write signal to the serial I/O2 transmit/receive buffer register (TB/RB) (address 001F16). When P6 7 (SCLK22) is selected as a clock I/O pin, S RDY2 output function is invalid, and P66 (SCLK21) is used as an I/O port. Data bus Address 001F16 Receive buffer register P64/RXD “0 ” Serial I/O2 control register Address 001D16 Receive buffer full flag (RBF) Receive interrupt request (RI) Clock control circuit Receive shift register Shift clock Serial I/O2 clock I/O pin selection bit “1 ” “0 ” P66/SCLK21 P67/SRDY2/SCLK22 XIN Internal system clock selection bit Serial I/O2 synchronous clock selection bit “0 ” “1 ” XCIN 1/2 “1 ” BRG count source selection bit Division ratio 1/(n+1) Baud rate generator BRG clock Address 003716 1/4 switch bit Falling edge detector Shift clock Transmit shift register Transmit buffer register Address 001F16 Data bus Clock control circuit 1/4 P67/SRDY2/SCLK22 F/F Serial I/O2 clock I/O pin selection bit P 6 5/ T X D Transmit shift register shift completion flag (TSC) Transmit interrupt source selection bit Transmit interrupt request (TI) Transmit buffer empty flag (TBE) Serial I/O2 status register Address 001E16 Fig. 36 Block diagram of clock synchronous serial I/O2 Transmit/Receive shift clock (1/2 to 1/2048 of internal clock or external clock) Serial I/O2 output TxD Serial I/O2 input RxD D0 D0 D1 D1 D2 D2 D3 D3 D4 D4 D5 D5 D6 D6 D7 D7 Receive enable signal SRDY2 Write-in signal to serial I/O2 transmit/receive buffer register (address 001F16) TBE = 0 RBF = 1 TSC = 1 Overrun error (OE) detection TBE = 1 TSC = 0 Notes 1 : The transmit interrupt (TI) can be selected to occur either when the transmit buffer has emptied (TBE=1) or after the transmit shift operation has ended (TSC=1), by setting transmit interrupt source selection bit (TIC) of the serial I/O2 control register. 2 : If data is written to the transmit buffer register when TSC=0, the transmit clock is generated continuously and serial data is output continuously from the TxD pin. 3 : The receive interrupt (RI) is set when the receive buffer full flag (RBF) becomes “1”. Fig. 37 Operation of clock synchronous serial I/O2 function 37 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER (2) Asynchronous serial I/O (UART) mode The asynchronous serial I/O (UART) mode can be selected by clearing the serial I/O2 mode selection bit (b6) of the serial I/O2 control register (address 001D16) to “0”. Eight serial data transfer formats can be selected and the transfer formats used by the transmitter and receiver must be identical. The transmit and receive shift registers each have a buffer (the two buffers have the same address in memory). Since the shift register cannot be written to or read from directly, transmit data is written to the transmit buffer, and receive data is read from the receive buffer. The transmit buffer can also hold the next data to be transmitted, and the receive buffer can receive 2-byte data continuously. Data bus Address 001F16 OE P64/RXD Receive buffer register Serial I/O2 control register Address 001D16 Receive buffer full flag (RBF) Receive interrupt request (RI) 1/16 PE FE P66/SCLK21 P67/SRDY2/SCLK22 XIN “1 ” “0 ” SP detector Character length selection bit 7 bit ST detector Receive shift register 8 bit Serial I/O2 clock I/O pin selection bit Clock control circuit Serial I/O2 synchronous clock selection bit UART control register Address 003816 “1 ” Internal system clock selection bit “0 ” BRG count source selection bit XCIN 1/2 “1 ” BRG clock switch bit 1/4 Division ratio 1/(n+1) Baud rate generator Address 003716 Transmit shift register shift completion flag (TSC) Transmit interrupt source selection bit Transmit interrupt request (TI) Transmit buffer empty flag (TBE) Address 001E16 Serial I/O2 status register ST/SP/PA generator 1/16 P65/TXD Character length selection bit Transmit buffer register Address 001F16 Data bus Transmit shift register Fig. 38 Block diagram of UART serial I/O2 Transmit or receive clock Write-in signal to transmit buffer register TBE=0 TSC=0 TBE=1 TBE=0 TBE=1 D0 D1 SP ST D0 D1 TSC=1* SP Serial I/O2 output TXD ST Read-out signal from receive buffer register 1 start bit 7 or 8 data bit 1 or 0 parity bit 1 or 2 stop bit RBF=0 RBF=1 * Generated at 2nd bit in 2-stop bit mode RBF=1 ST D0 D1 Serial I/O2 input RXD ST D0 D1 SP SP Fig. 39 Operation of UART serial I/O2 function 38 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER [Serial I/O2 Control Register] SIO2CON (001D16) The serial I/O2 control register contains eight control bits for serial I/O2 functions. [UART Control Register] UARTCON (0038 16) This is a 7 bit register containing four control bits, of which four bits are valid when UART is selected, and of which three bits are always valid. Data format of serial data receive/transfer and the output structure of the P6 5/TxD pin and others are set by this register. [Serial I/O2 Status Register] SIO2STS (001E16) The read-only serial I/O2 status register consists of seven flags (b0 to b6) which indicate the operating status of the serial I/O2 function and various errors. Three of the flags (b4 to b6) are only valid in the UART mode. The receive buffer full flag (b1) is cleared to “0” when the receive buffer is read. The error detection is performed at the same time data is transferred from the receive shift register to the receive buffer register, and the receive buffer full flag is set. A writing to the serial I/O2 status register clears error flags OE, PE, FE, and SE (b3 to b6, respectively). Writing “0” to the serial I/O2 enable bit (SIOE : b7 of the serial I/O2 control register) also clears all the status flags, including the error flags. All bits of the serial I/O2 status register are initialized to “0” at reset, but if the transmit enable bit (b4) of the serial I/O2 control register has been set to “1”, the transmit shift register shift completion flag (b2) and the transmit buffer empty flag (b0) become “1”. [Serial I/O2 Transmit Buffer Register/Receive Buffer Register] TB/RB (001F16) The transmit buffer and the receive buffer are located in the same address. The transmit buffer is write-only and the receive buffer is read-only. If a character bit length is 7 bits, the MSB of data stored in the receive buffer is “0”. [Baud Rate Generator] BRG (0037 16) The baud rate generator determines the baud rate for serial transfer. With the 8-bit counter having a reload register, the baud rate generator divides the frequency of the count source by 1/(n+1), where n is the value written to the baud rate generator. 39 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER b7 b0 Serial I/O2 status register (SIO2STS : address 001E16) Transmit buffer empty flag (TBE) 0: Buffer full 1: Buffer empty Receive buffer full flag (RBF) 0: Buffer empty 1: Buffer full Transmit shift register shift completion flag (TSC) 0: Transmit shift in progress 1: Transmit shift completed Overrun error flag (OE) 0: No error 1: Overrun error Parity error flag (PE) 0: No error 1: Parity error Framing error flag (FE) 0: No error 1: Framing error Summing error flag (SE) 0: (OE) U (PE) U (FE)=0 1: (OE) U (PE) U (FE)=1 Not used (returns “1” when read) b7 b0 Serial I/O2 control register (SIO2CON : address 001D16) BRG count source selection bit (CSS) 0: f(XIN) or f(XCIN)/2 or f(XCIN) 1: f(XIN)/4 or f(XCIN)/8 or f(XCIN)/4 Serial I/O2 synchronous clock selection bit (SCS) 0: BRG/ 4 (when clock synchronous serial I/O is selected) BRG/16 (UART is selected) 1: External clock input (when clock synchronous serial I/O is selected) External clock input/16 (UART is selected) SRDY2 output enable bit (SRDY) 0: P67 pin operates as ordinary I/O pin 1: P67 pin operates as SRDY2 output pin Transmit interrupt source selection bit (TIC) 0: Interrupt when transmit buffer has emptied 1: Interrupt when transmit shift operation is completed Transmit enable bit (TE) 0: Transmit disabled 1: Transmit enabled Receive enable bit (RE) 0: Receive disabled 1: Receive enabled Serial I/O2 mode selection bit (SIOM) 0: Asynchronous serial I/O (UART) 1: Clock synchronous serial I/O Serial I/O2 enable bit (SIOE) 0: Serial I/O2 disabled (pins P64 to P67 operate as ordinary I/O pins) 1: Serial I/O2 enabled (pins P64 to P67 operate as serial I/O pins) b7 b0 UART control register (UARTCON : address 003816) Character length selection bit (CHAS) 0: 8 bits 1: 7 bits Parity enable bit (PARE) 0: Parity checking disabled 1: Parity checking enabled Parity selection bit (PARS) 0: Even parity 1: Odd parity Stop bit length selection bit (STPS) 0: 1 stop bit 1: 2 stop bits P65/TXD P-channel output disable bit (POFF) 0: CMOS output (in output mode) 1: N-channel open-drain output (in output mode) BRG clock switch bit 0: XIN or XCIN (depends on internal system clock) 1: XCIN Serial I/O2 clock I/O pin selection bit 0: SCLK21 (P67/SCLK22 pin is used as I/O port or SRDY2 output pin.) 1: SCLK22 (P66/SCLK21 pin is used as I/O port.) Not used (return “1” when read) Fig. 40 Structure of serial I/O2 related register 40 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Serial I/O3 The serial I/O3 function can be used only for 8-bit clock synchronous serial I/O. All serial I/O pins are shared with port P9, which can be set with the serial I/O3 control register (address 0EEC 16). b7 b0 Serial I/O3 control register (SIO3CON : address 0EEC16) Internal synchronous clock selection bits b2 b1 b0 [Serial I/O3 Control Register (SIO3CON)] 0EEC16 The serial I/O3 control register contains eight bits which control various serial I/O functions. q Serial I/O3 Operation Either the internal clock or external clock can be selected as synchronous clock for serial I/O3 transfer. The internal clock can use a built-in dedicated divider where 6 different clocks are selected. In the case of the internal clock used, transfer is started by a write signal to the serial I/O3 register (address 0EED 16). When 8-bit data has been transferred, the S OUT3 pin goes to high impedance state. In the case of the external clock used, the clock must be externally controlled. It is because the contents of serial I/O3 register is kept shifted while the clock is being input. Additionally, the function to put the S OUT3 p in high impedance state at completion of data transfer is not available. The serial I/O3 interrupt request bit is set at completion of 8-bit data transfer, regardless of use of the internal clock or external clock. 0 0 0: f(XIN)/4 (f(XCIN)/8) 0 0 1: f(XIN)/8 (f(XCIN)/16) 0 1 0: f(XIN)/16 (f(XCIN)/32) 0 1 1: f(XIN)/32 (f(XCIN)/64) 1 1 0: f(XIN)/64 (f(XCIN)/128) 1 1 1: f(XIN)/128 (f(XCIN)/256) Serial I/O3 port selection bit (P91, P92) 0: I/O port 1: SOUT3, SCLK3 signal output SRDY3 output selection bit (P93) 0: I/O port 1: SRDY3 signal output Transfer direction selection bit 0: LSB first 1: MSB first Serial I/O3 synchronous clock selection bit 0: External clock 1: Internal clock P91/SOUT3 P-channel output disable bit (P91) 0: CMOS output (in output mode) 1: N-channel open drain output (in output mode) Fig. 42 Structure of serial I/O3 control register XCIN 1/2 “1 ” Internal system clock selection bit 1/4 1/8 Internal synchronous clock selection bits XIN “0 ” Divider 1/16 1/32 1/64 1/128 Data bus P93 latch “0 ” P93/SRDY3 Serial I/O3 synchronous clock selection bit “1” SCLK3 SRDY3 Synchronization “1 ” circuit SRDY3 output selection bit External clock “0 ” P92 latch “0 ” P92/SCLK3 “1 ” Serial I/O3 port selection bit Serial I/O3 counter (3) Serial I/O3 interrupt request P91 latch “0 ” P91/SOUT3 “1 ” Serial I/O3 port selection bit P90/SIN3 Serial I/O3 shift register (8) Fig. 41 Block diagram of serial I/O3 41 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Synchronous clock Transfer clock Serial I/O3 register write signal (Note) Serial I/O3 output SOUT3 D0 D1 D2 D3 D4 D5 D6 D7 Serial I/O3 input SIN3 Receive enable signal SRDY3 Note: When the internal clock is selected as the transfer clock, the SOUT3 pin goes to high impedance after transfer completion. Serial I/O3 interrupt request bit set Fig. 43 Timing of serial I/O3 (LSB first) 42 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER FLD CONTROLLER The M38B7 group has fluorescent display (FLD) drive and control circuits. Table 9 shows the FLD controller specifications. Table 9 FLD controller specifications Item High-breakdownvoltage output port CMOS port Specifications • 52 pins (20 pins can be switched to general-purpose ports) • 4 pins (all 4 pins can be switched to general-purpose ports) (A driver IC must be installed externally) • Used FLD output 28 segment ✕ 28 digit (segment number + digit number ≤ 56) • Used digit output 40 segment ✕ 16 digit (segment number ≤ 40, digit number ≤ 16) • Connected to M35501 56 segment ✕ (connected number of M35501) digit (segment number ≤ 56, digit number ≤ number of M35501 ✕ 16) • Used P6 4 to P67 expansion 52 segment ✕ 16 digit (segment number ≤ 52, digit number ≤ 16) • 4.0 µs to 1024 µs (count source X IN/16, 4 MHz) • 16.0 µs to 4096 µs (count source X IN/64, 4 MHz) • 4.0 µs to 1024 µs (count source X IN/16, 4 MHz) • 16.0 µs to 4096 µs (count source X IN/64, 4 MHz) • Digit interrupt • FLD blanking interrupt • Key-scan using digit • Key-scan using segment • Digit pulse output function This function automatically outputs digit pulses. • M35501 connection function The number of digits can be increased easily by using the output of DIM OUT (P73 ) as CLK for the M35501. • Toff section generating/nothing function This function does not generate Toff1 section when the connected outputs are the same. • Gradation display function This function allows each segment to be set for dark or bright display. • P64 to P67 expansion function This function provides 16 lines of digit outputs from four ports by attaching the decoder converting 4-bit data to 16-bit data. FLD controller port Display pixel number Period Dimmer time Interrupt Key-scan Expanded function 43 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Main address bus Main data bus Local data bus Digit output set switch register P20/FLD0 DIG/FLD P21/FLD1 DIG/FLD P22/FLD2 DIG/FLD P23/FLD3 DIG/FLD 8 P24/FLD4 DIG/FLD P25/FLD5 DIG/FLD P26/FLD6 DIG/FLD P27/FLD7 DIG/FLD 0EF316 000416 P00/FLD8 P01/FLD9 P02/FLD10 P03/FLD11 P04/FLD12 P05/FLD13 P06/FLD14 P07/FLD15 000016 DIG/FLD DIG/FLD DIG/FLD DIG/FLD 8 DIG/FLD DIG/FLD DIG/FLD DIG/FLD 0EF216 0E0016 FLD automatic display RAM Local address bus 0EDF16 P10/FLD16 P11/FLD17 P12/FLD18 P13/FLD19 8 P14/FLD20 P15/FLD21 P16/FLD22 P17/FLD23 000216 P30/FLD24 P31/FLD25 P32/FLD26 P33/FLD27 8 P34/FLD28 P35/FLD29 P36/FLD30 P37/FLD31 000616 FLDC mode register (0EF416) FLD data pointer reload register (0EF816) FLD/P FLD/P FLD/P FLD/P FLD/P FLD/P FLD/P FLD/P 0EF916 P40/FLD32 P41/FLD33 P42/FLD34 P43/FLD35 8 P44/FLD36 P45/FLD37 P46/FLD38 P47/FLD39 000816 Address decoder FLD data pointer (0EF816) Timing generator FLD/P P50/FLD40 FLD/P P51/FLD41 FLD/P P52/FLD42 FLD/P P53/FLD43 8 FLD/P P54/FLD44 FLD/P P55/FLD45 FLD/P P56/FLD46 FLD/P P57/FLD47 000A16 0EFA16 FLD blanking interrupt FLD digit interrupt FLD/P P60/FLD48 FLD/P P61/FLD49 FLD/P P62/FLD50 FLD/P P63/FLD51 8 FLD/P P64/FLD52 FLD/P P65/FLD53 FLD/P P66/FLD54 FLD/P P67/FLD55 000C16 0EFB16 FLD/Port switch register Fig. 44 Block diagram of FLD control circuit 44 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER b7 b6 b5 b4 b3 b2 b1 b0 FLDC mode register (FLDM: address 0EF416) Automatic display control bit 0 : General-purpose mode 1 : Automatic display mode Display start bit 0 : Stop display 1 : Display (start to display by switching “0” to “1”) Tscan control bits b3b2 0 0 : FLD digit interrupt (at rising edge of each digit) 0 1 : 1 ✕ Tdisp 1 0 : 2 ✕ Tdisp FLD blanking interrupt 1 1 : 3 ✕ Tdisp (at falling edge of the last digit) Timing number control bit 0 : 16 timing mode 1 : 32 timing mode Gradation display mode selection control bit 0 : Not selecting 1 : Selecting (Note) Tdisp counter count source selection bit 0 : f(XIN)/16 1 : f(XIN)/64 High-breakdown voltage port drivability selection bit 0 : Drivability strong 1 : Drivability weak Note: When the gradation display mode is selected, the max. number of timing is 16 timing. (Be sure to set the timing number control bit to “0”.) b7 b6 b5 b4 b3 b2 b1 b0 FLD output control register (FLDCON: address 0EFC16) P64 to P67 output reverse bit 0 : Output normally 1 : Reverse output Not used (return “0” when read); (Do not write “1”.) P64 to P67 Toff invalid bit 0 : Operation normally 1 : Toff invalid Not used (return “0” when read); (Do not write “1”.) P73 dimmer output control bit 0 : Normal port 1 : Dimmer output Generating/Not of CMOS port Toff section selection bit 0 : Toff section not generated 1 : Toff section generated Generating/Not of high-breakdown voltage port Toff section selection bit 0 : Toff section not generated 1 : Toff section generated Toff2 SET/RESET switch bit 0 : Toff2 RESET; Toff1 SET 1 : Toff2 SET; Tdisp RESET Fig. 45 Structure of FLDC related registers (1) 45 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER b7 b6 b5 b4 b3 b2 b1 b0 Port P4 FLD/Port switch register (P4FPR: address 0EF916) Port P40 FLD/Port switch bit 0 : Normal port 1 : FLD output port Port P41 FLD/Port switch bit 0 : Normal port 1 : FLD output port Port P42 FLD/Port switch bit 0 : Normal port 1 : FLD output port Port P43 FLD/Port switch bit 0 : Normal port 1 : FLD output port Port P44 FLD/Port switch bit 0 : Normal port 1 : FLD output port Port P45 FLD/Port switch bit 0 : Normal port 1 : FLD output port Port P46 FLD/Port switch bit 0 : Normal port 1 : FLD output port Port P47 FLD/Port switch bit 0 : Normal port 1 : FLD output port b7 b6 b5 b4 b3 b2 b1 b0 Port P5 FLD/Port switch register (P5FPR: address 0EFA16) Port P50 FLD/Port switch bit 0 : Normal port 1 : FLD output port Port P51 FLD/Port switch bit 0 : Normal port 1 : FLD output port Port P52 FLD/Port switch bit 0 : Normal port 1 : FLD output port Port P53 FLD/Port switch bit 0 : Normal port 1 : FLD output port Port P54 FLD/Port switch bit 0 : Normal port 1 : FLD output port Port P55 FLD/Port switch bit 0 : Normal port 1 : FLD output port Port P56 FLD/Port switch bit 0 : Normal port 1 : FLD output port Port P57 FLD/Port switch bit 0 : Normal port 1 : FLD output port Fig. 46 Structure of FLDC related registers (2) 46 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER b7 b6 b5 b4 b3 b2 b1 b0 Port P6 FLD/Port switch register (P6FPR: address 0EFB16) Port P60 FLD/Port switch bit 0 : Normal port 1 : FLD output port Port P61 FLD/Port switch bit 0 : Normal port 1 : FLD output port Port P62 FLD/Port switch bit 0 : Normal port 1 : FLD output port Port P63 FLD/Port switch bit 0 : Normal port 1 : FLD output port Port P64 FLD/Port switch bit 0 : Normal port 1 : FLD output port Port P65 FLD/Port switch bit 0 : Normal port 1 : FLD output port Port P66 FLD/Port switch bit 0 : Normal port 1 : FLD output Port Port P67 FLD/Port switch bit 0 : Normal port 1 : FLD output port Fig. 47 Structure of FLDC related registers (3) 47 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER b7 b6 b5 b4 b3 b2 b1 b0 Port P0 digit output set switch register (P0DOR: address 0EF216) Port P00 FLD/Digit switch bit 0 : FLD output 1 : Digit output Port P01 FLD/Digit switch bit 0 : FLD output 1 : Digit output Port P02 FLD/Digit switch bit 0 : FLD output 1 : Digit output Port P03 FLD/Digit switch bit 0 : FLD output 1 : Digit output Port P04 FLD/Digit switch bit 0 : FLD output 1 : Digit output Port P05 FLD/Digit switch bit 0 : FLD output 1 : Digit output Port P06 FLD/Digit switch bit 0 : FLD output 1 : Digit output Port P07 FLD/Digit switch bit 0 : FLD output 1 : Digit output b7 b6 b5 b4 b3 b2 b1 b0 Port P2 digit output set switch register (P2DOR: address 0EF316) Port P20 FLD/Digit switch bit 0 : FLD output 1 : Digit output Port P21 FLD/Digit switch bit 0 : FLD output 1 : Digit output Port P22 FLD/Digit switch bit 0 : FLD output 1 : Digit output Port P23 FLD/Digit switch bit 0 : FLD output 1 : Digit output Port P24 FLD/Digit switch bit 0 : FLD output 1 : Digit output Port P25 FLD/Digit switch bit 0 : FLD output 1 : Digit output Port P26 FLD/Digit switch bit 0 : FLD output 1 : Digit output Port P27 FLD/Digit switch bit 0 : FLD output 1 : Digit output Fig. 48 Structure of FLDC related registers (4) 48 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER FLD Automatic Display Pins P0 to P6 are the pins capable of automatic display output for the FLD. The FLD starts operating by setting the automatic display control bit (bit 0 at address 0EF416 ) to “1”. There is the FLD output function that outputs the RAM contents from the port every timing or the digit output function that drives the port high with a digit tim- ing. The FLD can be displayed using the FLD output for the segments and the digit or FLD output for the digits. When using the FLD output for the digits, be sure to write digit display patterns to the RAM in advance. The remaining segment and digit lines can be used as general-purpose ports. Settings of each port are shown below. Table 10 Pins in FLD automatic display mode Automatic display pin Setting method Port FLD0 to FLD 15 The individual bits of the digit output set switch registers (addresses 0EF216 , 0EF316) can P0, P2 set each pin to either an FLD port (“0”) or a digit port (“1”). When the pins are set for the digit port, the digit pulse output function is enabled, so that the digit pulses can always be output regardless the value of FLD automatic display RAM. Setting the automatic display control bit (bit 0 of address 0EF416 ) to “1” can set these ports P1, P3 FLD16 to FLD 31 to the FLD exclusive use port. P4, P5, FLD32 to FLD 51 The individual bits of the FLD/Port switch register (addresses 0EF916 to 0EFB 16 ) can set P60 to P63 each pin to either an FLD port (“1”) or a general-purpose port (“0”). P64 to P67 FLD52 to FLD 55 The individual bits of the port P6 FLD/Port switch register (address 0EFB16) can set each pin to either FLD port (“1”) or general-purpose port (“0”). A variety of output pulses can be available by setting of the FLD output control register (address 0EFC16 ). The port output structure is the CMOS output. When using the port as a display pin, a driver IC must be installed externally. Setting example 1 This is a register setup example where only FLD output is used. In this case, the digit display output pattern must be set in the FLD automatic display RAM in advance. Number of segments Number of digits Setting example 2 This is a register setup example where both FLD output and digit waveform output are used. In this case, because the digit display output is automatically generated, there is no need to set the display pattern in the FLD automatic display RAM. Number of segments Number of digits 36 16 The contents of digit output set switch registers (0EF216, 0EF316) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 28 12 The contents of digit output set switch registers (0EF216, 0EF316) 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 Port P2 FLD0 (DIG output) FLD1 (DIG output) FLD2 (DIG output) FLD3 (DIG output) FLD4 (DIG output) FLD5 (DIG output) FLD6 (DIG output) FLD7 (DIG output) FLD8 (DIG output) FLD9 (DIG output) FLD10 (DIG output) FLD11 (DIG output) FLD12 (DIG output) FLD13 (DIG output) FLD14 (DIG output) FLD15 (DIG output) FLD16 (SEG output) FLD17 (SEG output) FLD18 (SEG output) FLD19 (SEG output) FLD20 (SEG output) FLD21 (SEG output) FLD22 (SEG output) FLD23 (SEG output) FLD24 (SEG output) FLD25 (SEG output) FLD26 (SEG output) FLD27 (SEG output) FLD28 (SEG output) FLD29 (SEG output) FLD30 (SEG output) FLD31 (SEG output) Port P2 FLD/Port switch registers (0EF916 to 0EFB16) FLD0 (DIG output) FLD1 (DIG output) FLD2 (DIG output) FLD3 (DIG output) FLD4 (DIG output) FLD5 (DIG output) FLD6 (DIG output) FLD7 (DIG output) FLD8 (DIG output) FLD9 (DIG output) FLD10 (DIG output) FLD11 (DIG output) FLD12 (SEG output) FLD13 (SEG output) FLD14 (SEG output) FLD15 (SEG output) FLD16 (SEG output) FLD17 (SEG output) FLD18 (SEG output) FLD19 (SEG output) FLD20 (SEG output) FLD21 (SEG output) FLD22 (SEG output) FLD23 (SEG output) FLD24 (SEG output) FLD25 (SEG output) FLD26 (SEG output) FLD27 (SEG output) FLD28 (SEG output) FLD29 (SEG output) FLD30 (SEG output) FLD31 (SEG output) FLD/Port switch registers (0EF916 to 0EFB16) Port P0 Port P4 1 1 1 1 1 1 1 1 FLD32 (SEG output) FLD33 (SEG output) FLD34 (SEG output) FLD35 (SEG output) FLD36 (SEG output) FLD37 (SEG output) FLD38 (SEG output) FLD39(SEG output) Port P0 Port P4 1 FLD32 (SEG output) 1 FLD33 (SEG output) 1 FLD34 (SEG output) 1 FLD35 (SEG output) 1 FLD36 (SEG output) 1 FLD37 (SEG output) 1 FLD38 (SEG output) 1 FLD39 (SEG output) 1 1 1 1 0 FLD40 (SEG output) FLD41 (SEG output) FLD42 (SEG output) FLD43 (SEG output) FLD44 (port output) Port P1 Port P5 1 FLD40 (SEG output) 1 FLD41 (SEG output) 1 FLD42 (SEG output) 1 FLD43 (SEG output) 1 FLD44 (SEG output) 1 FLD45 (SEG output) 1 FLD46 (SEG output) 1 FLD47 (SEG output) 1 1 1 1 0 0 0 0 FLD48 (SEG output) FLD49 (SEG output) FLD50 (SEG output) FLD51 (SEG output) FLD52 (port output) FLD53 (port output) FLD54 (port output) FLD55 (port output) Port P1 Port P5 0 FLD45 (port output) 0 FLD46 (port output) 0 FLD47 (port output) Port P3 Port P6 Port P3 Port P6 0 0 0 0 0 0 0 FLD48 (port output) FLD49 (port output) FLD50 (port output) FLD51 (port output) FLD52 (port output) FLD53 (port output) FLD54 (port output) 0 FLD55 (port output) DIG output : This output is connected to digit of the FLD. SEG output : This output is connected to segment of the FLD. Port output : This output is general-purpose port (used by program). DIG output : This output is connected to digit of the FLD. SEG output : This output is connected to segment of the FLD. Port output : This output is general-purpose port (used by program). Fig. 49 Segment/Digit setting example 49 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER FLD Automatic Display RAM The FLD automatic display RAM uses the 224 bytes of addresses 0E0016 to 0EDF16. For FLD, the 3 modes of 16-timing•ordinary mode, 16-timing•gradation display mode and 32-timing mode are available depending on the number of timings and the use/not use of gradation display. The automatic display RAM in each mode is as follows: (3) 32-timing mode This mode is used when the display timing is 16 or greater. This mode can be used for up to 32-timing. The 224 bytes of addresses 0E00 16 t o 0EDF16 a re used as an FLD display data store area. The FLD data pointer (address 0EF8 16 ) is a register to count display timings. This pointer has a reload register. When the pointer underflow occurs, it starts counting over again after being reloaded with the initial value in the reload register. Make sure that (the timing counts – 1) is set to the FLD data pointer. When writing data to this address, the data is written to the FLD data pointer reload register; when reading data from this address, the value in the FLD data pointer is read. (1) 16-timing•ordinary mode This mode is used when the display timing is 16 or less. The 112 bytes of addresses 0E7016 to 0EDF 16 are used as a FLD display data store area. Because addresses 0E0016 to 0E6F 16 are not used as the automatic display RAM, they can be the ordinary RAM. (2) 16-timing•gradation display mode This mode is used when the display timing is 16 or less, in which mode each segment can be set for dark or bright display. The 224 bytes of addresses 0E0016 to 0EDF16 are used. The 112 bytes of addresses 0E70 16 to 0EDF16 are used as an FLD display data store area, while the 112 bytes of addresses 0E0016 to 0E6F16 are used as a gradation display control data store area. 16-timing•ordinary mode 0E0016 Not used 16-timing•gradation display mode 0E0016 Gradation display control data stored area 32-timing mode 0E0016 0E7016 1 to 16 timing display data stored area 0E7016 1 to 16 timing display data stored area 1 to 32 timing display data stored area 0EDF16 0EDF16 0EDF16 Fig. 50 FLD automatic display RAM assignment 50 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Data Setup (1) 16-timing•ordinary mode The area of addresses 0E7016 to 0EDF16 are used as a FLD automatic display RAM. When data is stored in the FLD automatic display RAM, the last data of FLD port P6 is stored at address 0E70 16 , the last data of FLD port P5 is stored at address 0E80 16, the last data of FLD port P4 is stored at address 0E90 16, the last data of FLD port P3 is stored at address 0EA016 , the last data of FLD port P1 is stored at address 0EB016 , the last data of FLD port P0 is stored at address 0EC0 16, and the last data of FLD port P2 is stored at address 0ED0 16 , to assign in sequence from the last data respectively. The first data of the FLD port P6, P5, P4, P3, P1, P0, and P2 is stored at an address which adds the value of (the timing number – 1) to the corresponding addresses 0E7016 , 0E8016, 0E90 16, 0EA016 , 0EB016, 0EC016 and 0ED016. Set the FLD data pointer reload register to the value given by (the timing number – 1). (2) 16-timing•gradation display mode Display data setting is performed in the same way as that of the 16-timing • ordinary mode. Gradation display control data is arranged at an address resulting from subtracting 007016 from the display data store address of each timing and pin. Bright display is performed by setting “0”, and dark display is performed by setting “1” . (3) 32-timing Mode The area of addresses 0E0016 to 0EDF16 is used as a FLD automatic display RAM. When data is stored in the FLD automatic display RAM, the last data of FLD port P6 is stored at address 0E0016 , the last data of FLD port P5 is stored at address 0E20 16, the last data of FLD port P4 is stored at address 0E4016, the last data of FLD port P3 is stored at address 0E60 16, the last data of FLD port P1 is stored at address 0E8016 , the last data of FLD port P0 is stored at address 0EA016, and the last data of FLD port P2 is stored at address 0EC0 16, to assign in sequence from the last data respectively. The first data of the FLD port P6, P5, P4, P3, P1, P0, and P2 is stored at an address which adds the value of (the timing number – 1) to the corresponding addresses 0E00 16, 0E20 16, 0E4016 , 0E6016 , 0E8016, 0EA016 and 0EC016. Set the FLD data pointer reload register to the value given by (the timing number – 1). Number of timing: 8 (FLD data pointer reload register = 7) B it Address 7 6 5 4 3 2 1 0 Bit Address 7 6 5 4 3 2 1 0 0E7016 0E7116 0E7216 0E7316 0E7416 0E7516 0E7616 0E7716 0E7816 0E7916 0E7A16 0E7B16 0E7C16 0E7D16 0E7E16 0E7F16 0E8016 0E8116 0E8216 0E8316 0E8416 0E8516 0E8616 0E8716 0E8816 0E8916 0E8A16 0E8B16 0E8C16 0E8D16 0E8E16 0E8F16 0E9016 0E9116 0E9216 0E9316 0E9416 0E9516 0E9616 0E9716 0E9816 0E9916 0E9A16 0E9B16 0E9C16 0E9D16 0E9E16 0E9F16 0EA016 0EA116 0EA216 0EA316 0EA416 0EA516 0EA616 0EA716 0EA816 0EA916 0EAA16 0EAB16 0EAC16 0EAD16 0EAE16 0EAF16 The last timing (The last data of FLDP6) Timing for start (The first data of FLDP6) FLDP6 data area The last timing (The last data of FLDP5) Timing for start (The first data of FLDP5) FLDP5 data area The last timing (The last data of FLDP4) Timing for start (The first data of FLDP4) FLDP4 data area 0EB016 0EB116 0EB216 0EB316 0EB416 0EB516 0EB616 0EB716 0EB816 0EB916 0EBA16 0EBB16 0EBC16 0EBD16 0EBE16 0EBF16 0EC016 0EC116 0EC216 0EC316 0EC416 0EC516 0EC616 0EC716 0EC816 0EC916 0ECA16 0ECB16 0ECC16 0ECD16 0ECE16 0ECF16 0ED016 0ED116 0ED216 0ED316 0ED416 0ED516 0ED616 0ED716 0ED816 0ED916 0EDA16 0EDB16 0EDC16 0EDD16 0EDE16 0EDF16 The last timing (The last data of FLDP1) Timing for start (The first data of FLDP1) FLDP1 data area The last timing (The last data of FLDP0) Timing for start (The first data of FLDP0) FLDP0 data area The last timing (The last data of FLDP2) Timing for start (The first data of FLDP2) FLDP2 data area The last timing (The last data of FLDP3) Timing for start (The first data of FLDP3) FLDP3 data area Fig. 51 Example of using FLD automatic display RAM in 16-timing•ordinary mode 51 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Number of timing: 15 (FLD data pointer reload register = 14) B it Address 7 6 5 4 3 2 1 0 B it Address 7 6 5 4 3 2 1 0 0E7016 0E7116 0E7216 0E7316 0E7416 0E7516 0E7616 0E7716 0E7816 0E7916 0E7A16 0E7B16 0E7C16 0E7D16 0E7E16 0E7F16 0E8016 0E8116 0E8216 0E8316 0E8416 0E8516 0E8616 0E8716 0E8816 0E8916 0E8A16 0E8B16 0E8C16 0E8D16 0E8E16 0E8F16 0E9016 0E9116 0E9216 0E9316 0E9416 0E9516 0E9616 0E9716 0E9816 0E9916 0E9A16 0E9B16 0E9C16 0E9D16 0E9E16 0E9F16 0EA016 0EA116 0EA216 0EA316 0EA416 0EA516 0EA616 0EA716 0EA816 0EA916 0EAA16 0EAB16 0EAC16 0EAD16 0EAE16 0EAF16 0EB016 0EB116 0EB216 0EB316 0EB416 0EB516 0EB616 0EB716 0EB816 0EB916 0EBA16 0EBB16 0EBC16 0EBD16 0EBE16 0EBF16 0EC016 0EC116 0EC216 0EC316 0EC416 0EC516 0EC616 0EC716 0EC816 0EC916 0ECA16 0ECB16 0ECC16 0ECD16 0ECE16 0ECF16 0ED016 0ED116 0ED216 0ED316 0ED416 0ED516 0ED616 0ED716 0ED816 0ED916 0EDA16 0EDB16 0EDC16 0EDD16 0EDE16 0EDF16 The last timing (The last data of FLDP6) FLDP6 data area Timing for start (The first data of FLDP6) The last timing (The last data of FLDP5) FLDP5 data area Timing for start (The first data of FLDP5) The last timing (The last data of FLDP4) FLDP4 data area Timing for start (The first data of FLDP4) The last timing (The last data of FLDP3) FLDP3 data area Timing for start (The first data of FLDP3) The last timing (The last data of FLDP1) FLDP1 data area Timing for start (The first data of FLDP1) The last timing (The last data of FLDP0) FLDP0 data area Timing for start (The first data of FLDP0) The last timing (The last data of FLDP2) FLDP2 data area Timing for start (The first data of FLDP2) 0E0016 0E0116 0E0216 0E0316 0E0416 0E0516 0E0616 0E0716 0E0816 0E0916 0E0A16 0E0B16 0E0C16 0E0D16 0E0E16 0E0F16 0E1016 0E1116 0E1216 0E1316 0E1416 0E1516 0E1616 0E1716 0E1816 0E1916 0E1A16 0E1B16 0E1C16 0E1D16 0E1E16 0E1F16 0E2016 0E2116 0E2216 0E2316 0E2416 0E2516 0E2616 0E2716 0E2816 0E2916 0E2A16 0E2B16 0E2C16 0E2D16 0E2E16 0E2F16 0E3016 0E3116 0E3216 0E3316 0E3416 0E3516 0E3616 0E3716 0E3816 0E3916 0E3A16 0E3B16 0E3C16 0E3D16 0E3E16 0E3F16 0E4016 0E4116 0E4216 0E4316 0E4416 0E4516 0E4616 0E4716 0E4816 0E4916 0E4A16 0E4B16 0E4C16 0E4D16 0E4E16 0E4F16 0E5016 0E5116 0E5216 0E5316 0E5416 0E5516 0E5616 0E5716 0E5816 0E5916 0E5A16 0E5B16 0E5C16 0E5D16 0E5E16 0E5F16 0E6016 0E6116 0E6216 0E6316 0E6416 0E6516 0E6616 0E6716 0E6816 0E6916 0E6A16 0E6B16 0E6C16 0E6D16 0E6E16 0E6F16 The last timing (The last data of FLDP6) FLDP6 gradation display data area Timing for start (The first data of FLDP6) The last timing (The last data of FLDP5) FLDP5 gradation display data area Timing for start (The first data of FLDP5) The last timing (The last data of FLDP4) FLDP4 gradation display data area Timing for start (The first data of FLDP4) The last timing (The last data of FLDP3) FLDP3 gradation display data area Timing for start (The first data of FLDP3) The last timing (The last data of FLDP1) FLDP1 gradation display data area Timing for start (The first data of FLDP1) The last timing (The last data of FLDP0) FLDP0 gradation display data area Timing for start (The first data of FLDP0) The last timing (The last data of FLDP2) FLDP2 gradation display data area Timing for start (The first data of FLDP2) Fig. 52 Example of using FLD automatic display RAM in 16-timing•gradation display mode 52 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Number of timing: 20 (FLD data pointer reload register = 19) B it Address Bit Address 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 0E7016 0E7116 0E7216 0E7316 0E7416 0E7516 0E7616 0E7716 0E7816 0E7916 0E7A16 0E7B16 0E7C16 0E7D16 0E7E16 0E7F16 0E8016 0E8116 0E8216 0E8316 0E8416 0E8516 0E8616 0E8716 0E8816 0E8916 0E8A16 0E8B16 0E8C16 0E8D16 0E8E16 0E8F16 0E9016 0E9116 0E9216 0E9316 0E9416 0E9516 0E9616 0E9716 0E9816 0E9916 0E9A16 0E9B16 0E9C16 0E9D16 0E9E16 0E9F16 0EA016 0EA116 0EA216 0EA316 0EA416 0EA516 0EA616 0EA716 0EA816 0EA916 0EAA16 0EAB16 0EAC16 0EAD16 0EAE16 0EAF16 0EB016 0EB116 0EB216 0EB316 0EB416 0EB516 0EB616 0EB716 0EB816 0EB916 0EBA16 0EBB16 0EBC16 0EBD16 0EBE16 0EBF16 0EC016 0EC116 0EC216 0EC316 0EC416 0EC516 0EC616 0EC716 0EC816 0EC916 0ECA16 0ECB16 0ECC16 0ECD16 0ECE16 0ECF16 0ED016 0ED116 0ED216 0ED316 0ED416 0ED516 0ED616 0ED716 0ED816 0ED916 0EDA16 0EDB16 0EDC16 0EDD16 0EDE16 0EDF16 Timing for start (The first data of FLDP3) The last timing (The last data of FLDP1) FLDP1 data area Timing for start (The first data of FLDP1) The last timing (The last data of FLDP0) FLDP0 data area Timing for start (The first data of FLDP0) The last timing (The last data of FLDP2) FLDP2 data area Timing for start (The first data of FLDP2) 0E0016 0E0116 0E0216 0E0316 0E0416 0E0516 0E0616 0E0716 0E0816 0E0916 0E0A16 0E0B16 0E0C16 0E0D16 0E0E16 0E0F16 0E1016 0E1116 0E1216 0E1316 0E1416 0E1516 0E1616 0E1716 0E1816 0E1916 0E1A16 0E1B16 0E1C16 0E1D16 0E1E16 0E1F16 0E2016 0E2116 0E2216 0E2316 0E2416 0E2516 0E2616 0E2716 0E2816 0E2916 0E2A16 0E2B16 0E2C16 0E2D16 0E2E16 0E2F16 0E3016 0E3116 0E3216 0E3316 0E3416 0E3516 0E3616 0E3716 0E3816 0E3916 0E3A16 0E3B16 0E3C16 0E3D16 0E3E16 0E3F16 0E4016 0E4116 0E4216 0E4316 0E4416 0E4516 0E4616 0E4716 0E4816 0E4916 0E4A16 0E4B16 0E4C16 0E4D16 0E4E16 0E4F16 0E5016 0E5116 0E5216 0E5316 0E5416 0E5516 0E5616 0E5716 0E5816 0E5916 0E5A16 0E5B16 0E5C16 0E5D16 0E5E16 0E5F16 0E6016 0E6116 0E6216 0E6316 0E6416 0E6516 0E6616 0E6716 0E6816 0E6916 0E6A16 0E6B16 0E6C16 0E6D16 0E6E16 0E6F16 The last timing (The last data of FLDP6) FLDP6 data area Timing for start (The first data of FLDP6) The last timing (The last data of FLDP5) FLDP5 data area Timing for start (The first data of FLDP5) The last timing (The last data of FLDP4) FLDP4 data area Timing for start (The first data of FLDP4) The last timing (The last data of FLDP3) FLDP3 data area Fig. 53 Example of using FLD automatic display RAM in 32-timing mode 53 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Timing Setting Each timing is set by the FLDC mode register, Tdisp time set register, Toff1 time set register, and Toff2 time set register. (3) Toff2 time setting The Toff2 time is time for dark display. For bright display, the FLD display output remains effective until the counter that is counting Tdisp underflows. For dark display, however, “L” (or “off”) signal is output when the counter that is counting Toff2 underflows. This Toff2 time setting is valid only for FLD ports which are in the gradation display mode and whose gradation display control RAM value is “1” . Set the Toff2 time by the Toff2 time set register. Make sure the value set to Toff2 is smaller than Tdisp but larger than Toff1. Supposing that the value of the Toff2 time set register is n2, the Toff2 time is represented as Toff2 = n2 ✕ t . When the Tdisp counter count source selection bit of the FLDC mode register is “0” and the value of the Toff2 time set register is 180 (B416 ), Toff2 = 180 ✕ 4.0 µs (at XIN = 4 MHz) = 720 µ s. When bit 7 of the FLD output control register (address 0EFC 16 ) is set to “1”, be sure to set the value of 03 16 or more to the Toff2 time set register (address 0EF7 16 ). (1) Tdisp time setting The Tdisp time means the length of display timing. In non-gradation display mode, it consists of the FLD display output term and the Toff1 time. In gradation display mode, it consists of the display output term and the Toff1 time plus a low signal output term for dark display. Set the Tdisp time by the Tdisp counter count source selection bit of the FLDC mode register and the Tdisp time set register. Supposing that the value of the Tdisp time set register is n, the Tdisp time is represented as Tdisp = (n+1) ✕ t ( t: count source). When the Tdisp counter count source selection bit of the FLDC mode register is “0” and the value of the Tdisp time set register is 200 (C816), the Tdisp time is: Tdisp = (200 + 1) ✕ 4.0 µ s (at XIN = 4 MHz) = 804 µs. When reading the Tdisp time set register, the counting value is read out. (2) Toff1 time setting The Toff1 time means a non-output (low signal output) time to prevent blurring of FLD and for dimmer display. Use the Toff1 time set register to set this Toff1 time. Make sure the value set to Toff1 is smaller than Tdisp and Toff2. Supposing that the value of the Toff1 time set register is n1, the Toff1 time is represented as Toff1 = n1 ✕ t. When the Tdisp counter count source selection bit of the FLDC mode register is “0” and the value of the Toff1 time set register is 30 (1E16), Toff1 = 30 ✕ 4.0 µs (at X IN = 4 MHz) = 120 µ s. Be sure to set the value of 0316 or more to the Toff1 time set register (address 0EF616 ). Low output term for blurring prevention Display output term •Gradation display mode is not selected (Address 0EF416 bit 5 = “0”) •Gradation display mode is selected and set for bright display (Address 0EF416 bit 5 = “1” and the corresponding gradation display control data = “0”) Toff1 Tdisp Low output term for blurring prevention Display output term Low output term for dark display •Gradation display mode is selected and set for dark display (Address 0EF416 bit 5 = “1” and the corresponding gradation display control data = “1”) Toff1 Toff2 Tdisp Fig. 54 FLD and digit output timing 54 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER FLD Automatic Display Start Automatic display starts by setting both the automatic display control bit (bit 0 of address 0EF4 16 ) and the display start bit (bit 1 of address 0EF416 ) to “1”. The RAM contents at a location apart from the start address of the automatic display RAM for each port by (FLD data pointer (address 0EF8 16 ) – 1) are output to each port. The FLD data pointer (address 0EF816 ) counts down in the Tdisp interval. When the count results in “FF 16 ”, the pointer is reloaded and starts counting over again. Before setting the display start bit (bit 1 of address 0EF4 16) to “1”, be sure to set the FLD/port switch registers, digit output set switch registers, FLDC mode register, Tdisp time set register, Toff1 time set register, Toff2 time set register, and FLD data pointer. During FLD automatic display, the display start bit always keeps “1”, and FLD automatic display can be interrupted by writing “0” to this bit. Key-scan and Interrupt Either the FLD digit interrupt or FLD blanking interrupt can be selected using the Tscan control bits (bits 2, 3 of address 0EF4 16). The FLD digit interrupt is generated when the Toff1 time in each timing expires (at rising edge of digit output). Key scanning that makes use of FLD digits can be achieved using each FLD digit interrupt. To use FLD digit interrupts for key scanning, follow the procedure described below: (1) Read the port value each time the interrupt occurs. (2) The key is fixed on the last digit interrupt. The output digit positions can be determined by reading the FLD data pointer (address 0EF816 ). Repeat cycle Tdisp Toff1 Tn FLD digit output Tn-1 Tn-2 T4 T3 T2 T1 Tn Tn-1 Tn-2 T4 FLD digit interrupt generated at the rising edge of digit (each timing) Fig. 55 Timing using digit interrupt 55 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER The FLD blanking interrupt is generated when the FLD data pointer (address 0EF816) reaches “FF 16”. The FLD automatic display output is turned off for a duration of 1 ✕ Tdisp, 2 ✕ Tdisp, or 3 ✕ Tdisp depending on post-interrupt settings. During this time, key scanning that makes use of FLD segments can be achieved. When the key scanning is performed with the segment during key-scan blanking time Tscan, follow the procedure described below: (1) Write “0” to the automatic display control bit (bit 0 of address 0EF416). (2) Set the port corresponding to the segment for key scanning to the output port. (3) Perform key scanning. (4) Write “1” to the automatic display control bit. s Note When performing a key-scan according to the above steps 1 to 4, take the following points into consideration. 1. Do not set the display start bit (bit 1 of address 0EF416 ) to “0”. 2. Do not set “1” in the ports corresponding to digits. Repeat cycle Tdisp Tn FLD digit output Segment setting by software FLD blanking interrupt generated at the falling of edge of the last timing Tn-1 Tn-2 T4 T3 T2 T1 Tscan Tn Tn-1 Tn-2 Fig. 56 Timing using FLD blanking interrupt 56 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER P64 to P6 7 Expansion Function Ports P6 4 to P6 7 are CMOS output structure. FLD digit outputs can be increased as many as 16 lines by connecting a decoder converting 4-bit to 16-bit data to these ports. P64 to P67 have the function to allow for connection to a decoder converting 4-bit to 16-bit data. (3) P64 to P6 7 FLD output reverse function P64 to P67 have the function to reverse the polarity of the FLD output. This function is useful in adjusting the polarity when using an externally installed driver. The output polarity can be reversed by setting the P6 4 to P67 output reverse bit of the FLD output control register (bit 0 of address 0EFC 16) to “1”. (1) P6 4 to P67 Toff invalid function This function disables the Toff1 time and Toff2 time and outputs display data for the duration of Tdisp. (See Figure 57.) This can be achieved by setting the P6 4 to P67 Toff invalid bit (bit 2 of address 0EFC 16) to “1”. s Note In the case of gradation display mode and dark display, P64 to P67 Toff invalid function is disabled. (2) Dimmer signal output function This function allows a dimmer signal creation signal to be output from DIMOUT (P73). The dimmer function can be achieved by controlling the decoder with this signal. (See Figure 57.) This function can be set by setting P73 dimmer output control bit (bit 4 of address 0EFC 16) to “1”. Unlike the Toff section generating/nothing function, this function disables all display data. •Gradation display mode is not selected •Gradation display mode is selected and set for bright display (gradation display control data = “0”) FLD output •Gradation display mode is selected and set for dark display (gradation display control data = “1”) •Gradation display mode is selected and Toff2 SET/RESET switch bit is “1” (gradation display control data = “1”) Toff1 Toff2 Tdisp Output selecting P64 to P67 Toff invalid For dimmer signal DIMOUT (P73) Fig. 57 P64 to P67 FLD output pulses 57 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Toff Section Generate/Nothing Function The function is for reduction of useless noises which generated as every switching of ports, because of the combined capacity of among FLD ports. When the continuous data is output to each FLD port, the Toff1 section of the continuous parts is not generated. (See Figure 58) If it needs Toff1 section on FLD pulses, set the generating /not of CMOS port Toff section selection bit (bit 5 of address 0EFC16) to “1” and set the generating /not of high-breakdown-voltage port Toff section selection bit to “1”. High-breakdown-voltage ports (P2, P0, P1, P3, P4, P5, P6 3 t o P60, total 52 pins) generate Toff1 section by setting the generating /not of high-breakdown-voltage port Toff section selection bit to “ 1 ”. The CMOS ports (P64 to P67, total 4 pins ) generate Toff1 section by setting the generating /not of CMOS port Toff section selection bit to “1”. Tdisp Toff1 “H” output P1X Output waveform when generating/not of high-breakdown voltage port Toff section selection P2X bit (bit 6 of address 0EFC16) is “1”. “H” output “H” output “L” output “H” output “L” output “H” output “H” output “H” output P1X Output waveform when generating/not of high-breakdown voltage port Toff section selection bit (bit 6 of address 0EFC16) is “0”. P2X “L” output “H” output “H” output Section of Toff1 is not generated because of output is the same. “H” output “H” output “L” output “H” output Section of Toff1 is not generated because of output is the same. Fig. 58 Toff section generating/nothing function Toff2 SET/RESET Switch Function In gradation display mode, the values set by the Toff2 time set register (TOFF2) are effective. When the Toff2 SET/RESET switch bit of FLD output control register (bit 7 of address 0EFC16) is “ 0 ” , RAM data is output to the FLD output ports (SET) at the time that is set by TOFF1 and it is turned to “0” (RESET) at the time that is set by TOFF2. When Toff2 SET/RESET switch bit is “ 1 ” , RAM data is output (SET) at the time that is set by TOFF2 and it is turned to “0” (RESET) when the Tdisp time expires. s Note In the case of gradation display mode and dark display, the Toff section generate/nothing function is disabled. 58 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Digit Pulses Output Function P0 0 to P0 7 and P2 0 to P2 7 can output digit pulses by using the digit output set switch registers. Set the digit output set switch registers by setting as many consecutive 1s as the timing count from P20. The contents of FLD automatic display RAM for the ports that have been selected for digit output are disabled, and the pulse shown in Figure 59 is output automatically. The output timing consists of Tdisp time and Toff1 time, and Toff2 time does not exist. Because the contents of FLD automatic display RAM are disabled, the segment data can be changed easily even when segment data and digit data coexist at the same address in the FLD automatic display RAM. This function is effective in 16-timing•ordinary mode and 16-timing gradation display mode. If a value is set exceeding the timing count (FLD data pointer reload register ’s set value + 1) for any port, the output of such port is “L”. Tdisp Toff1 P07 P06 P05 P04 P03 P02 P01 P00 P27 P26 P25 P24 P23 P22 P21 P20 Low-order 4bits of the data pointer F E D C B A 9 8 7 6 5 4 3 2 1 0 Fig. 59 Digit pulses output function 59 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER A-D CONVERTER The 38B7 group has a 10-bit A-D converter. The A-D converter performs successive approximation conversion. Note that the comparator is constructed linked to a capacitor, so that set f(X IN) to at least 250 kHz during A-D conversion. Additionally, bit 7 of the CPU mode register (address 003B16) must be set to “0”. [A-D Conversion Register] ADH, ADL One of these registers is a high-order register, and the other is a low-order register. The high-order 8 bits of a conversion result is stored in the A-D conversion register (high-order) (address 003416 ), and the low-order 2 bits of the same result are stored in bit 7 and bit 6 of the A-D conversion register (low-order) (address 003316 ). During A-D conversion, do not read these registers. b7 b6 b5 b4 b3 b2 b1 b0 AD/DA control register (ADCON: address 003216) Analoginput pin selection bits b3b2b1b0 [AD/DA Control Register] ADCON This register controls A-D converter. Bits 3 to 0 are analog input pin selection bits. Bit 4 is an AD conversion completion bit and “0” during A-D conversion. This bit is set to “1” upon completion of AD conversion. A-D conversion is started by writing “0” in this bit. [Comparison Voltage Generator] The comparison voltage generator divides the voltage between AVss and V REF by 1024, and outputs the divided voltages. [Channel Selector] The channel selector selects one of the input ports PA7/AN7 –PA0 / AN0 , and P9 7/BUZ02/AN 15 t o P9 0/S IN3/AN8 a nd inputs it to the comparator. 0 0 0 0 : PA0/AN0 0 0 0 1 : PA1/AN1 0 0 1 0 : PA2/AN2 0 0 1 1 : PA3/AN3 0 1 0 0 : PA4/AN4 0 1 0 1 : PA5/AN5 0 1 1 0 : PA6/AN6 0 1 1 1 : PA7/AN7 1 0 0 0 : P90/SIN3/AN8 1 0 0 1 : P91/SOUT3/AN9 1 0 1 0 : P92/SCLK3/AN10 1 0 1 1 : P93/SRDY3/AN11 1 1 0 0 : P94/RTP1/AN12 1 1 0 1 : P95/RTP0/AN13 1 1 1 0 : P96/PWM0/AN14 1 1 1 1 : P97/BUZ02/AN15 AD conversion completion bit 0 : Conversion in progress 1 : Conversion completed Not used (returns “0” when read) DA output enable bit 0 : DA output disabled 1 : DA output enabled Not used (returns “0” when read) AD conversion register (high-order) (ADH: address 003416) AD conversion register (low-order) (ADL: address 003316) b7 b0 [Comparator and Control Circuit] The comparator and control circuit compares an analog inputvoltage with the comparison voltage and stores the result in the A-D conversion register. When an A-D conversion is completed, the control circuit sets the AD conversion completion bit and the AD conversion interrupt request bit to “1”. b9 b8 b7 b6 b5 b4 b3 b2 b7 b1 b0 b0 Note: When reading the low-order 6 bits at address 003316, “0” is read out. Fig. 60 Structure of AD/DA control register Data bus b7 b0 AD/DA control register 4 PA0/AN0 PA1/AN1 PA2/AN2 PA3/AN3 PA4/AN4 PA5/AN5 PA6/AN6 PA7/AN7 P90/SIN3/AN8 P91/SOUT3/AN9 P92/SCLK3/AN10 P93/SRDY3/AN11 P94/RTP1/AN12 P95/RTP0/AN13 P96/PWM0/AN14 P97/BUZ02/AN15 Fig. 61 Block diagram of A-D converter A-D control circuit A-D interrupt request Comparator A-D conversion register (H) A-D conversion register (L) Channel selector (Address 003416) (Address 003316) Resistor ladder AVSS VREF 60 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER D-A CONVERTER The 38B7 group has one internal D-A converter with 8-bit resolution. The D-A conversion is performed by setting the value in the D-A conversion register. The result of D-A conversion is output from the DA pin by setting the DA output enable bit to “1”. When using the D-A converter, the PB 0/DA port direction register bit must be set to “0” (input status). The output analog voltage V is determined by the value n (decimal notation) in the D-A conversion register as follows: V = V REF ✕ n/256 (n = 0 to 255) Where VREF is the reference voltage. At reset, the D-A conversion register is cleared to “00 16 ”, and the DA output enable bit is cleared to “0”, and PB 0 /DA pin becomes high impedance. The DA output does not have buffers. Accordingly, connect an external buffer when driving a low-impedance load. Set VCC to 3.0 V or more when using the D-A converter. Fig. 62 Block diagram of D-A converter Data bus D-A conversion register (8) DA output enable bit PB0/DA R-2R resistor ladder “0” DA output enable bit R PB0/DA “1” MSB D-A conversion register “0” “1” 2R R R R R R R 2R 2R 2R 2R 2R 2R 2R 2R LSB AVSS VREF Fig. 63 Equivalent connection circuit of D-A converter 61 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER PWM (Pulse Width Modulation) The 38B7 group has a PWM function with a 14-bit resolution. When the oscillation frequency XIN is 4 MHz, the minimum resolution bit width is 250 ns and the cycle period is 4096 µs. The PWM timing generator supplies a PWM control signal based on a signal that is the frequency of the XIN clock. The explanation in the rest assumes XIN = 4 MHz. Data bus It is set to “1” when write. PWM register (low-order) (address 003616) bit7 bit5 bit0 bit7 bit0 PWM register (high-order) (address 003516) PWM latch (14-bit) MSB LSB 14 P96 latch P96/PWM0 PWM P96/PWM output selection bit P96/PWM output selection bit P96 direction register 14-bit PWM circuit XCIN 1/2 “1” XIN (4MHz) “0” When the internal system clock selection bit is set (64 µs cycle) Timing to “0” generating unit for PWM (4096 µs cycle) Fig. 64 PWM block diagram 62 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Data Setup The PWM output pin also function as port P96 . Set port P96 to be the PWM output pin by setting bit 0 of the PWM control register (address 0026 16) to “1”. The high-order 8 bits of output data are set in the high-order PWM register PWMH (address 0035 16 ) and the low-order 6 bits are set in the low-order PWM register PWML (address 0036 16). Transfer From Register to Latch Data written to the PWML register is transferred to the PWM latch once in each PWM period (every 4096 µ s), and data written to the PWMH register is transferred to the PWM latch once in each subperiod (every 64 µ s). Pulses output from the PWM output pin correspond to this latch contents. When the PWML register is read, the contents of the latch are read. However, bit 7 of the PWML register indicates whether the transfer to the PWM latch is completed: the transfer is completed when bit 7 is “0”, it is not done when bit 7 is “1”. PWM Operation The timing of the 14-bit PWM function is shown in Figure 65. The 14-bit PWM data is divided into the low-order 6 bits and the high-order 8 bits in the PWM latch. The high-order 8 bits of data determine how long an “H” level signal is output during each sub-period. There are 64 sub-periods in each period, and each sub-period t is 256 ✕ τ (= 64 µ s) long. The signal’s “H” has a length equal to N times τ, and its minimum resolution = 250 ns. The last bit of the sub-period becomes the ADD bit which is specified either “H” or “L,” by the contents of PWML. As shown in Table 11, the ADD bit is decided either “H” or “L.” That is, only in the sub-period tm shown in Table 11 in the PWM cycle period T = 64 t, the “H” duration is lengthened during the minimum resolution width τ period in comparison with the other period. For example, if the high-order eight bits of the 14-bit data are “03 16” and the low-order six bits are “05 16,” the length of the “H” level output in sub-periods t8, t24, t32, t40 and t56 is 4 τ , and its length 3 τ in all other sub-periods. Time at the “H” level of each sub-period almost becomes equal because the time becomes length set in the high-order 8 bits or becomes the value plus t, and this sub-period t (= 64 µ s, approximate 15.6 kHz) becomes cycle period approximately. Table 11 Relationship between low-order 6-bit data and setting period of ADD bit Low-order Sub-periods tm lengthened (m = 0 to 63) 6-bit data LSB 000000 000001 000010 000100 001000 010000 100000 None m = 32 m = 16, 48 m = 8, 24, 40, 56 m = 4, 12, 20, 28, 36, 44, 52, 60 m = 2, 6, 10, 14, 18, 22, 26, 30, 34, 38, 42, 46, 50, 54, 58, 62 m = 1, 3, 5, 7, .................................................., 57, 59, 61, 63 4096 µs 64 µs m=0 64 µs m=7 64 µs m=8 64 µs m=9 64 µs m = 63 15.75 µs 15.75 µs 15.75 µs 16.0 µs 15.75 µs 15.75 µs 15.75 µs Pulse width modulation register H: 00111111 Pulse width modulation register L: 000101 Sub-periods where “H” pulse width is 16.0 µs: m = 8, 24, 32, 40, 56 Sub-periods where “H” pulse width is 15.75 µs: m = all other values Fig. 65 PWM timing 63 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER b7 b0 PWM control register (PWMCON: address 002616) P96/PWM0 output selection bit 0: I/O port 1: PWM0 output Not used (return “0” when read) Fig. 66 Structure of PWM control register Data 6A16 stored at address 003516 PWM register (high-order) 5916 6A16 Bit 7 cleared after transfer 2416 Transfer from register to latch PWM latch (14-bit) 165316 1A9316 1AA416 T = 4096 µs (64 ✕ 64 µs) t = 64 µs 1AA416 Data 7B16 stored at address 003516 7B16 Data 3516 stored at address 003616 3516 B516 1EE416 Transfer from register to latch 1EF516 Data 2416 stored at address 003616 PWM register (low-order) 1316 A416 When bit 7 of PWML is “0,” transfer from register to latch is disabled. (Example 1) PWM output 1 Low-order 6-bits output H = 6A16 L = 2416 6A 6B 6A 6B 6A 6B 6A 6B 6A 6B 6B 6B 6A 6B 6A 6B 6A 6B 6A 6B 6A 6B 6A 6B 6A 6B 6A 5 5 5 5 5 2 5 5 5 5 106 ✕ 64 + 36 5 5 5 5 5 6B16............36 times (107) 6A16............28 times (106) (Example 2) PWM output 6A 6A 6A 6A 6B 6A 6B 6A 6B 6A 6A 6A 6B 6A 6B 6A 6B 6A 6A 6A 6B 6A 6B 6A 6B 6A 6A Low-order 6 bits output H = 6A16 L = 1816 4 3 4 4 6A16............40 times 3 4 106 ✕ 64 + 24 4 3 4 6B16............24 times Minimum bit width τ = 0.25 µs 6A 69 68 67 •••••• t = 64 µs (256 ✕ 0.25 µs) PWM output 2 6B ADD 02 01 ADD 6A 69 68 67 •••••• 02 01 8-bit counter 02 01 00 FF FE FD FC •••••• 97 96 95 •••••• 02 01 00 FF FE FD FC •••••• 97 96 95 •••••• The ADD portions with additional τ are determined either “H” or “L” by low-order 6-bit data. “H” period length specified by PWMH 256 τ (64 µs), fixed Fig. 67 14-bit PWM timing 64 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER INTERRUPT INTERVAL DETERMINATION FUNCTION The 38B7 group has an interrupt interval determination circuit. This interrupt interval determination circuit has an 8-bit binary up counter. Using this counter, it determines a duration of time from the rising edge (falling edge) of an input signal pulse on the P7 2/ INT 2 pin to the rising edge (falling edge) of the signal pulse that is input next. How to determine the interrupt interval is described below. 1. Enable the INT2 interrupt by setting bit 2 of the interrupt control register 1 (address 003E16 ). Select the rising interval or falling interval by setting bit 2 of the interrupt edge selection register (address 003A16 ). 2. Set bit 0 of the interrupt interval determination control register (address 0031 16) to “1” (interrupt interval determination operating). 3. Select the sampling clock of 8-bit binary up counter by setting bit 1 of the interrupt interval determination control register. 4. When the signal of polarity which is set on the INT 2 pin (rising or falling edge) is input, the 8-bit binary up counter starts counting up of the selected counter sampling clock. 5. When the signal of polarity selected above is input again, the value of the 8-bit binary up counter is transferred to the interrupt interval determination register (address 0030 16 ), and the remote control interrupt request occurs. Immediately after that, the 8-bit binary up counter continues to count up again from “00 16”. 6. When count value reaches “FF 16”, the 8-bit binary up counter stops counting up. Then, simultaneously when the next counter sampling clock is input, the counter sets value “FF16 ” to the interrupt interval determination register to generate the counter overflow interrupt request. Noise Filter The P7 2/INT2 pin builds in the noise filter. The noise filter operation is described below. 1. Select the sampling clock of the input signal with bits 2 and 3 of the interrupt interval determination control register. When not using the noise filter, set “0016 ”. 2. The P7 2 /INT2 input signal is sampled in synchronization with the selected clock. When sampling the same level signal in a series of three sampling, the signal is recognized as the interrupt signal, and the interrupt request occurs. When setting bit 4 of interrupt interval determination control register to “1”, the interrupt request can occur at both rising and falling edges. When using the noise filter, set the minimum pulse width of the INT2 input signal to 3 cycles or more of the sample clock. Internal system clock selection bit f(XIN)/128 f(XCIN) Counter sampling clock selection bit 1/1 Divider 1/2 8-bit binary up counter Counter overflow interrupt request or remote control interrupt request INT2 interrupt input Noise filter Interrupt interval determination register address 003016 Noise filter sampling clock selection bit 1/1 One-sided/both-sided edge detection selection bit 1/4 1/2 Data bus Divider f(XIN)/32 f(XCIN) Internal system clock selection bit Fig. 68 Interrupt interval determination circuit block diagram 65 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER b7 b0 Interrupt interval determination control register (IIDCON: address 003116) Interrupt interval determination circuit operating selection bit 0 : Stopped 1 : Operating Counter sampling clock selection bit 0 : f(XIN)/128 or f(XCIN) 1 : f(XIN)/256 or f(XCIN)/2 Noise filter sampling clock selection bits (INT2) b3b2 0 0 : Filter stop 0 1 : f(XIN)/32 or f(XCIN) 1 0 : f(XIN)/64 or f(XCIN)/2 1 1 : f(XIN)/128 or f(XCIN)/4 One-sided/both-sided edge detection selection bit 0 : One-sided edge detection 1 : Both-sided edge detection (can be used when using a noise filter) Not used (return “0” when read) (Do not write “1” to these bits.) Fig. 69 Structure of interrupt interval determination control register (When IIDCON4 = “0”) Noise filter sampling clock INT2 pin Acceptance of interrupt Counter sampling clock N 8-bit binary up counter value N Interrupt interval determination register value N Remote control interrupt request Remote control interrupt request 0 1 2 3 4 6 0 6 6 Counter overflow interrupt request 1 2 3 0 FF FF FE FF 1 5 Fig. 70 Interrupt interval determination operation example (at rising edge active) (When IIDCON4 = “1”) Noise filter sampling clock INT2 pin Acceptance of interrupt Counter sampling clock N 8-bit binary up counter value N Interrupt interval determination register value N Remote control interrupt request Remote control interrupt request 0 1 2 0 2 2 1 2 3 0 3 3 Remote control interrupt request Remote control interrupt request 1 2 0 2 2 1 2 FE FF 0 FF FF Counter overflow interrupt request 1 Fig. 71 Interrupt interval determination operation example (at both-sided edge active) 66 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER WATCHDOG TIMER The watchdog timer gives a mean of returning to the reset status when a program cannot run on a normal loop (for example, because of a software runaway). The watchdog timer consists of an 8-bit watchdog timer L and a 8-bit watchdog timer H. (2) Watchdog timer H count source selection bit operation Bit 7 of the watchdog timer control register (address 0EEE 16) permits selecting a watchdog timer H count source. When this bit is set to “0”, the underflow signal of watchdog timer L becomes the count source. The detection time is set to 131.072 ms at f(XIN) = 4 MHz frequency, and 32.768 s at f(XCIN) = 32 kHz frequency. When this bit is set to “1”, the count source becomes the signal divided by 8 for f(X IN) or divided by 16 for f(X CIN). The detection time in this case is set to 512 µ s at f(XIN) = 4 MHz frequency, and 128 ms at f(XCIN ) = 32 kHz frequency. This bit is cleared to “0” after reset. Standard Operation Of Watchdog Timer When any data is not written into the watchdog timer control register (address 0EEE 16) after reset, the watchdog timer is in the stop state. The watchdog timer starts to count down by writing an optional value into the watchdog timer control register and an internal reset occurs at an underflow of the watchdog timer H. Accordingly, programming is usually performed so that writing to the watchdog timer control register may be started before an underflow. When the watchdog timer control register is read, the values of the high-order 6 bits of the watchdog timer H, STP instruction disable bit, and watchdog timer H count source selection bit are read. (3) Operation of STP instruction disable bit Bit 6 of the watchdog timer control register (address 0EEE 16) permits disabling the STP instruction when the watchdog timer is in operation. When this bit is “0”, the STP instruction is enabled. When this bit is “1”, the STP instruction is disabled. If the STP instruction is executed, an internal resetting occurs. When this bit is set to “1”, it cannot be rewritten to “0” by program. This bit is cleared to “0” after reset. (1) Initial value of watchdog timer At reset or writing to the watchdog timer control register (address 0EEE 16), a watchdog timer H is set to “ FF16” a nd a watchdog timer L to “FF16 ”. s Note When releasing the stop mode, the watchdog timer performs its count operation even in the stop release waiting time. Be careful not to cause the watchdog timer H to underflow in the stop release waiting time, for example, by writing any data in the watchdog timer control register (address 0EEE 16) before executing the STP instruction. XCIN 1/2 “1” Internal system clock selection bit (Note) “0” “FF16” is set when watchdog timer control register is written to. Watchdog timer L (8) 1/8 Data bus “FF16” is set when watchdog timer control register is written to. “0” “1” Watchdog timer H (8) XIN Watchdog timer H count source selection bit STP instruction disable bit STP instruction Reset circuit Internal reset RESET Note: Either high-speed, middle-speed or low-speed mode is selected by bit 7 of CPU mode register. Fig. 72 Block diagram of watchdog timer b7 b0 Watchdog timer control register (WDTCON : address 0EEE16) Watchdog timer H (for read-out of high-order 6 bits) STP instruction disable bit 0: STP instruction enabled 1: STP instruction disabled Watchdog timer H count source selection bit 0: Watchdog timer L underflow 1: f(XIN)/8 or f(XCIN)/16 Fig. 73 Structure of watchdog timer control register 67 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER BUZZER OUTPUT CIRCUIT The 38B7 group has a buzzer output circuit. One of 1 kHz, 2 kHz and 4 kHz (at XIN = 4.19 MHz) frequencies can be selected by the buzzer output control register (address 0EFD16 ). Either P77/BUZ01 or P97/B UZ02/AN 15 can be selected as a buzzer output port by the output port selection bits (b2 and b3 of address 0EFD16 ). The buzzer output is controlled by the buzzer output ON/OFF bit (b4). Note: In the low-speed mode, a buzzer output is made OFF. Port latch f(XIN) Divider 1/1024 1/2048 1/4096 Buzzer output Buzzer output ON/OFF bit Output port control signal Port direction register Fig. 74 Block diagram of buzzer output circuit b7 b0 Buzzer output control register (BUZCON: address 0EFD16) Output frequency selection bits (XIN = 4.19 MHz) b1b0 0 0 : 1 kHz (f(XIN)/4096) 0 1 : 2 kHz (f(XIN)/2048) 1 0 : 4 kHz (f(XIN)/1024) 1 1 : Not available Output port selection bits b3b2 0 0 : P77 and P97 function as ordinary ports. 0 1 : P77/BUZ01 functions as a buzzer output. 1 0 : P97/BUZ02/AN15 functions as a buzzer output. 1 1 : Not available Buzzer output ON/OFF bit b4 0 : Buzzer output OFF (“0” output) 1 : Buzzer output ON Not used (returns “0” when read) Fig. 75 Structure of buzzer output control register 68 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER RESET CIRCUIT To reset the microcomputer, RESET pin should be held at an “L” level for 2 µs or more. Then the RESET pin is returned to an “H” level (the power source voltage should be between 2.7 V and 5.5 V, and the oscillation should be stable), reset is released. After the reset is completed, the program starts from the address contained in address FFFD 16 (high-order byte) and address FFFC16 (loworder byte). Make sure that the reset input voltage is less than 0.54 V for Vcc of 2.7 V (switching to the high-speed mode, a power source voltage must be between 4.0 V and 5.5 V). Poweron Power source voltage 0V Reset input voltage 0V (Note) RESET VCC 0.2VCC Note : Reset release voltage ; Vcc=2.7 V RESET VCC Power source voltage detection circuit Fig. 76 Reset circuit example XIN φ RESET Internal reset Address ? ? ? ? FFFC FFFD ADH, ADL Data ADL ADH SYNC XIN: about 4000 cycles Notes 1: The frequency relation of f(XIN) and f(φ) is f(XIN)=4 • f(φ). 2: The question marks (?) indicate an undefined state that depends on the previous state. Fig. 77 Reset sequence 69 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Address Register contents (1) Port P0 (2) Port P1 (3) Port P1 direction register (4) Port P2 (5) Port P3 (6) Port P3 direction register (7) Port P4 (8) Port P4 direction register (9) Port P5 (10) Port P5 direction register (11) Port P6 (12) Port P6 direction register (13) Port P7 (14) Port P7 direction register (15) Port P8 (16) Port P8 direction register (17) Port P9 (18) Port P9 direction register (19) Port PA (20) Port PA direction register (21) Port PB (22) Port PB direction register (23) Serial I/O1 control register 1 (24) Serial I/O1 control register 2 (25) Serial I/O1 control register 3 (26) Serial I/O2 control register (27) Serial I/O2 status register (28) Timer 1 (29) Timer 2 (30) Timer 3 (31) Timer 4 (32) Timer 5 (33) Timer 6 (34) PWM control register (35) Timer 12 mode register (36) Timer 34 mode register (37) Timer 56 mode register 000016 000216 000316 000416 000616 000716 000816 000916 000A16 000B16 000C16 000D16 000E16 000F16 001016 001116 001216 001316 001416 001516 001616 001716 001916 001A16 001C16 001D16 001E16 002016 002116 002216 002316 002416 002516 002616 002816 002916 002A16 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 8016 FF16 0116 FF16 FF16 FF16 FF16 0016 0016 0016 0016 (38) D-A conversion register (39) Timer X (low-order) (40) Timer X (high-order) (41) Timer X mode register 1 (42) Timer X mode register 2 (43) Interrupt interval determination register (44) Interrupt interval determination control register (45) AD/DA control register (46) UART control register (47) Interrupt source switch register (48) Interrupt edge selection register (49) CPU mode register (50) Interrupt request register 1 (51) Interrupt request register 2 (52) Interrupt control register 1 (53) Interrupt control register 2 (54) Serial I/O3 control register (55) Watchdog timer control register (56) Pull-up control register 3 (57) Pull-up control register 1 (58) Pull-up control register 2 (59) Port P0 digit output set switch register (60) Port P2 digit output set switch register (61) FLDC mode register (62) Tdisp time set register (63) Toff1 time set register (64) Toff2 time set register Address Register contents 002B16 002C16 002D16 002E16 002F16 003016 003116 003216 003816 003916 003A16 0016 FF16 FF16 0016 0016 0016 0016 1016 8016 0016 0016 003B16 0 1 0 0 1 0 0 0 003C16 003D16 003E16 003F16 0EEC16 0EEE16 0EEF16 0EF016 0EF116 0EF216 0EF316 0EF416 0EF516 0EF616 0EF716 0016 0016 0016 0016 0016 3F16 0016 0016 0016 0016 0016 0016 0016 FF16 FF16 0016 0016 0016 0016 0016 0016 0016 (65) Port P4 FLD/Port switch register 0EF916 (66) Port P5 FLD/Port switch register 0EFA16 (67) Port P6 FLD/Port switch register 0EFB16 (68) FLD output control register (69) Buzzer output control register (70) Flash memory control register (71) Flash command register (72) Processor status register (73) Program counter 0EFC16 0EFD16 0EFE16 0EFF16 (PS) ✕ ✕ ✕ ✕ ✕ 1 ✕ ✕ (PCH) (PCL) FFFD16 contents FFFC16 contents ✕: Not fixed Since the initial values for other than above mentioned registers and RAM contents are indefinite at reset, they must be set. Fig. 78 Internal status at reset 70 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER CLOCK GENERATING CIRCUIT The 38B7 group has two built-in oscillation circuits. An oscillation circuit can be formed by connecting a resonator between X IN and XOUT or XCIN and X COUT. Use the circuit constants in accordance with the resonator manufacturer ’s recommended values. No external resistor is needed between X IN and X OUT since a feedback resistor exists on-chip. However, an external feedback resistor is needed between XCIN and XCOUT. Immediately after power on, only the X IN oscillation circuit starts oscillating, and XCIN and XCOUT pins function as I/O ports. Oscillation Control (1) Stop mode If the STP instruction is executed, the internal system clock stops at an “H” level, and X IN and XCIN oscillators stop. Timer 1 is set to “FF16 ” and timer 2 is set to “0116 ”. Either X IN divided by 8 or XCIN divided by 16 is input to timer 1 as count source, and the output of timer 1 is connected to timer 2. The bits of the timer 12 mode register are cleared to “0”. Set the interrupt enable bits of the timer 1 and timer 2 to disabled (“0”) before executing the STP instruction. Oscillator restarts when an external interrupt is received, but the internal system clock is not supplied to the CPU until timer 2 underflows. This allows time for the clock circuit oscillation to stabilize. (2) Wait mode If the WIT instruction is executed, the internal system clock stops at an “H” level. The states of XIN and X CIN are the same as the state before executing the WIT instruction. The internal system clock restarts at reset or when an interrupt is received. Since the oscillator does not stop, normal operation can be started immediately after the clock is restarted. Frequency Control (1) Middle-speed mode The internal system clock is the frequency of XIN divided by 4. After reset, this mode is selected. (2) High-speed mode The internal system clock is the frequency of X IN. (3) Low-speed mode The internal system clock is the frequency of X CIN divided by 2. s Note If you switch the mode between middle/high-speed and lowspeed, stabilize both X IN and X CIN oscillations. The sufficient time is required for the sub clock to stabilize, especially immediately after power on and at returning from stop mode. When switching the mode between middle/high-speed and low-speed, set the frequency on condition that f(XIN) > 3 • f(X CIN). (4) Low power consumption mode The low power consumption operation can be realized by stopping the main clock XIN in low-speed mode. To stop the main clock, set the main clock stop bit (bit 5) of the CPU mode register to “ 1 ” . When the main clock X IN is restarted (by setting the main clock stop bit to “0”), set enough time for oscillation to stabilize. XCIN Rf XCOUT Rd CCOUT XIN XOUT CCIN CIN COUT Fig. 79 Ceramic resonator circuit XCIN XCOUT open XIN XOUT open External oscillation circuit VCC VSS External oscillation circuit or external pulse VCC VSS Fig. 80 External clock input circuit 71 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER XCIN XCOUT “1” “0” Port XC switch bit (Note 3) 1/2 XIN XOUT Internal system clock selection bit (Notes 1, 3) Low-speed mode “1 ” “0 ” High-speed or middle-speed mode Timer 1 count source selection bit (Note 2) “1” Timer 2 count source selection bit (Note 2) “0” Timer 1 1/4 1/2 “0” “1” Timer 2 Main clock division ratio selection bits (Note 3) Middle-speed mode “1” “0” Timing φ (internal clock) Main clock stop bit (Note 3) High-speed or low-speed mode Q S R STP instruction WIT instruction SQ R QS R STP instruction Reset Interrupt disable flag l Interrupt request Notes 1: When low-speed mode is selected, set the port Xc switch bit (b4) to “1”. 2: Refer to the structure of the timer 12 mode register. 3: Refer to the structure of the CPU mode register. Fig. 81 Clock generating circuit block diagram 72 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Reset Middle-speed mode (φ =1 MHz) CM7=0(4 MHz selected) CM6=1(middle-speed) CM5=0(XIN oscillating) CM4=0(32 kHz stopped) CM6 “1” High-speed mode (φ =4 MHz) “0” CM7=0(4 MHz selected) CM6=0(high-speed) CM5=0(XIN oscillating) CM4=0(32 kHz stopped) “0” 4 “0” CM 6 0” ” M“ “1 C ” “1 C M4 “1 ” CM 4 “1” “0 ” Middle-speed mode (φ =1 MHz) CM7=0(4 MHz selected) CM6=1(middle-speed) CM5=0(XIN oscillating) CM4=1(32 kHz oscillating) CM6 “1” “0” High-speed mode (φ =4 MHz) CM7=0(4 MHz selected) CM6=0(high-speed) CM5=0(XIN oscillating) CM4=1(32 kHz oscillating) “0” C M7 “1” C M7 CM6 “1” “0” Low-speed mode (φ =16 kHz) CM7=1(32 kHz selected) CM6=0(high-speed) CM5=0(XIN oscillating) CM4=1(32 kHz oscillating) Low-speed mode (φ =16 kHz) CM7=1(32 kHz selected) CM6=1(middle-speed) CM5=0(XIN oscillating) CM4=1(32 kHz oscillating) “1” “0” “1” 6 “1 ” C M4 “0 ” CM “0” b7 b4 CPU mode register (CPUM : address 003B16) CM4 : Port Xc switch bit 0: I/O port function 1: XCIN-XCOUT oscillating function CM5 : Main clock (XIN- XOUT) stop bit 0: Oscillating 1: Stopped CM6: Main clock division ratio selection bit 0: f(XIN) (High-speed mode) 1: f(XIN)/4 (Middle-speed mode) CM7: Internal system clock selection bit 0: XIN–XOUT selected (Middle-/High-speed mode) 1: XCIN–XCOUT selected (Low-speed mode) “0” C M5 “1” “0 ” Low-power dissipation mode (φ =16 kHz) CM7=1(32 kHz selected) CM6=1(middle-speed) CM5=1(XIN stopped) CM4=1(32 kHz oscillating) CM6 “1” “0” Low-power dissipation mode (φ =16 kHz) CM7=1(32 kHz selected) CM6=0(high-speed) CM5=1(XIN stopped) CM4=1(32 kHz oscillating) Notes 1: Switch the mode by the allows shown between the mode blocks. (Do not switch between the mode directly without an allow.) 2: The all modes can be switched to the stop mode or the wait mode and return to the source mode when the stop mode or the wait mode is ended. 3: Timer operates in the wait mode. 4: When the stop mode is ended, a delay of approximately 1 ms occurs by Timer 1 in middle-/high-speed mode. 5: When the stop mode is ended, a delay of approximately 0.25 s occurs by Timer 1 in low-speed mode. 6: The example assumes that 4 MHz is being applied to the XIN pin and 32 kHz to the XCIN pin. φ indicates the internal system clock. Fig. 82 State transitions of system clock “1” ” “1 CM ” “1 6 ” “0 “1 ” CM C 5 6 “1 ” C M5 M ” “0 “0 ” CM 5 “0” 73 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Power Dissipation Calculating Method (Fixed number depending on microcomputer’s standard) • VOH output fall voltage of high-breakdown port 2 V (max.); | Current value | = at 18 mA • Resistor value = 48 kΩ (min.) • Power dissipation of internal circuit (CPU, ROM, RAM etc.) = 5 V ✕ 15 mA = 75 mW (Fixed number depending on use condition) • Apply voltage to VEE pin: Vcc – 45 V • Timing number a; digit number b; segment number c • Ratio of Toff time corresponding Tdisp time: 1/16 • Turn ON segment number during repeat cycle: d • All segment number during repeat cycle: e (= a ✕ c) • Total number of built-in resistor: for digit, f; for segment, g • Digit pin current value h (mA) • Segment pin current value i (mA) (1) Digit pin power dissipation {h ✕ b ✕ (1 – Toff / Tdisp) ✕ voltage} / a (2) Segment pin power dissipation {i ✕ d ✕ (1–Toff / Tdisp) ✕ voltage} / a (3) Pull-down resistor power dissipation (digit) {power dissipation per 1 digit ✕ (b ✕ f / b) ✕ (1–Toff / Tdisp) } / a (4) Pull-down resistor power dissipation (segment) {power dissipation per 1 segment ✕ ( d ✕ g / c ) ✕ ( 1 – Toff / Tdisp) } / a (5) Internal circuit power dissipation (CPU, ROM, RAM etc.) = 190 mW (1) + (2)+ (3) + (4) + (5) = X mW 74 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Power Dissipation Calculating Example 1 (Fixed number depending on microcomputer ’s standard) • V OH output fall voltage of high-breakdown port 2 V (max.); | Current value | = at 18 mA • Resistor value 43 V / 900 µ s = 48 kΩ (min.) • Power dissipation of internal circuit (CPU, ROM, RAM etc.) = 5 V ✕ 15 mA = 75 mW ( Fixed number depending on use condition) • Apply voltage to VEE pin: Vcc – 45 V • Timing number 17; digit number 16; segment number 20 • Ratio of Toff time corresponding Tdisp time: 1/16 • Turn ON segment number during repeat cycle: 31 • All segment number during repeat cycle: 340 (= 17 ✕ 20) • Total number of built-in resistor: for digit, 16; for segment, 20 • Digit pin current value 18 (mA) • Segment pin current value 3 (mA) (1) Digit pin power dissipation {18 ✕ 16 ✕ (1 – 1 / 16) ✕ 2} / 17 = 31.77 mW (2) Segment pin power dissipation {3 ✕ 31 ✕ (1– 1 / 16) ✕ 2} / 17 = 10.26 mW (3) Pull-down resistor power dissipation (digit) [{45 – 2}2/ 48 ✕ (16 ✕ 16 / 16) ✕ (1 – 1 / 16)] / 17 = 33.94 mW (4) Pull-down resistor power dissipation (segment) [{45 – 2}2/ 48 ✕ (31 ✕ 20 / 20) ✕ (1 – 1 / 16)] / 17 = 65.86 mW (5) Internal circuit power dissipation (CPU, ROM, RAM etc.) = 75 mW (1) + (2)+ (3) + (4) + (5) = 217 mW DIG0 DIG1 DIG2 DIG3 DIG13 DIG14 DIG15 Timing number 1 2 3 Repeat cycle Tscan 14 15 16 17 Fig. 83 Digit timing waveform (1) 75 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Power Dissipation Calculating Example 2 (2 or more digits turned ON at the same time) (Fixed number depending on microcomputer’s standard) • VOH output fall voltage of high-breakdown port 2 V (max.); | Current value | = at 18 mA • Resistor value 43 V / 900 µ s = 48 kΩ (min.) • Power dissipation of internal circuit (CPU, ROM, RAM etc.) = 5 V ✕ 15 mA = 75 mW (Fixed number depending on use condition) • Apply voltage to VEE pin: Vcc – 45 V • Timing number 11; digit number 12; segment number 24 • Ratio of Toff time corresponding Tdisp time: 1/16 • Turn ON segment number during repeat cycle: 114 • All segment number during repeat cycle: 264 (= 11 ✕ 24) • Total number of built-in resistor: for digit, 10; for segment, 22 • Digit pin current value 18 (mA) • Segment pin current value 3 (mA) (1) Digit pin power dissipation {18 ✕ 12 ✕ (1 – 1 / 16) ✕ 2} / 11 = 36.82 mW (2) Segment pin power dissipation {3 ✕ 114 ✕ (1– 1 / 16) ✕ 2} / 11 = 58.30 mW (3) Pull-down resistor power dissipation (digit) [{45 – 2}2/ 48 ✕ (12 ✕ 10 / 12) ✕ (1 – 1 / 16)] / 11 = 32.84 mW (4) Pull-down resistor power dissipation (segment) [{45 – 2}2/ 48 ✕ (114 ✕ 22 / 24) ✕ (1 – 1 / 16)] / 11 = 343.08 mW (5) Internal circuit power dissipation (CPU, ROM, RAM etc.) = 75 mW (1) + (2)+ (3) + (4) + (5) = 547 mW DIG0 DIG1 DIG2 DIG3 DIG4 DIG5 DIG6 DIG7 DIG8 DIG9 Timing number 1 2 3 4 5 6 7 8 9 10 11 Repeat cycle Tscan Fig. 84 Digit timing waveform (2) 76 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER FLASH MEMORY MODE The M38B79FF has the flash memory mode in addition to the normal operation mode (microcomputer mode). The user can use this mode to perform read, program, and erase operations for the internal flash memory. The M38B79FF has three modes the user can choose: the parallel input/output and serial input/output mode, where the flash memory is handled by using the external programmer, and the CPU reprogramming mode, where the flash memory is handled by the central processing unit (CPU). The following explains these modes. Functional Outline (parallel input/output mode) In the parallel input/output mode, the M38B79FF allow the user to choose an operation mode between the read-only mode and the read/write mode (software command control mode) depending on the voltage applied to the VPP pin. When VPP = VPP L, the readonly mode is selected, and the user can choose one of three states (e.g., read, output disable, or standby) depending on inputs ___ ___ ___ to the CE, OE, and WE pins. When VPP = V PP H, the read/write mode is selected, and the user can choose one of four states (e.g., read, output disable, standby, or write) depending on inputs __ __ ___ to the CE, OE, and WE pins. Table 13 shows assignment states of control input and each state. q Read __ The microcomputer enters the read state by driving the CE, and __ ___ OE pins low and the WE pin high; and the contents of memory corresponding to the address to be input to address input pins (A0 –A16 ) are output to the data input/output pins (D0 –D7 ). q Output disable The microcomputer enters the output disable state by driving the __ ___ __ CE pin low and the WE and OE pins high; and the data input/output pins enter the floating state. q Standby __ The microcomputer enters the standby state by driving the CE pin high. The M38B79FF is placed in a power-down state consuming only a minimal supply current. At this time, the data input/output pins enter the floating state. q Write The microcomputer enters the write state by driving the VPP pin ___ __ high (V PP = VPP H) and then the WE pin low when the CE pin is __ low and the OE pin is high. In this state, software commands can be input from the data input/output pins, and the user can choose program or erase operation depending on the contents of this software command. (1) Flash memory mode 1 (parallel I/O mode) The parallel I/O mode can be selected by connecting wires as shown in Figures 85 and supplying power to the V CC a nd V PP pins. In this mode, the M38B79FF operates as an equivalent of MITSUBISHI’s CMOS flash memory M5M28F101. However, because the M38B79FF ’ s internal memory has a capacity of 60 Kbytes, programming is available for addresses 0100016 t o 0FFFF16, and make sure that the data in addresses 0000016 to 00FFF16 and addresses 10000 16 to 1FFFF16 are FF16 . Note also that the M38B79FF does not contain a facility to read out a device identification code by applying a high voltage to address input (A9 ). Be careful not to erratically set program conditions when using a general-purpose PROM programmer. Table 12 shows the pin assignments when operating in the parallel input/output mode. Table 12 Pin assignments of M38B79FF when operating in the parallel input/output mode VCC VPP VSS Address input Data I/O __ CE ___ OE ___ WE M38B79FF VCC CNVSS VSS Ports P0, P1, P31 Port P2 P36 P37 P33 M5M28F101 VCC VPP VSS A0–A16 D0–D7 __ CE __ OE ___ WE Table 13 Assignment states of control input and each state Pin Mode Read-only State Read Output disable Standby Read Output disable Standby Write __ __ ___ CE VIL VIL VIH VIL VIL VIH VIL OE VIL VIH × VIL VIH × VIH WE VIH VIH × VIH VIH × VIL VPP VPPL VPPL VPPL VPPH VPPH VPPH VPPH Data I/O Output Floating Floating Output Floating Floating Input Read/Write Note: × can be VIL or VIH . 77 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Table 14 Pin description (flash memory parallel I/O mode) Pin VCC, VSS CNVSS _____ RESET XIN XOUT AVSS VREF P00–P07 P10–P17 P20–P27 P30–P37 Name Power supply VPP input Reset input Clock input Clock output Analog supply input Reference voltage input Address input (A0–A7) Address input (A8–A15) Data I/O (D0–D7 ) Control signal input Input /Output — Input Input Input Output — Input Input Input I/O Input Functions Supply 5 V ± 10 % to VCC and 0 V to VSS. Connect to 5 V ± 10 % in read-only mode, connect to 11.7 V to 12.6 V in read/write mode. Connect to VSS. Connect a ceramic resonator between XIN and XOUT. Connect to VSS. Connect to VSS. Port P0 functions as 8-bit address input (A0–A7). Port P1 functions as 8-bit address input (A8–A15 ). Function as 8-bit data’s I/O pins (D0–D7 ). Connect them to Vss through each resistor___ kΩ. of 6.8 __ __ P37, P36 and P33 function as the OE, CE and WE input pins respectively. P31 functions as the A16 input pin. Connect P30 and P32 to VSS. Input “H” or “L” to P34, P35, or keep them open. Input “H” or “L”, or keep them open. Input “H” or “L”, or keep them open. Connect P64 and P66 to VSS. Input “H” or “L” to P6 0–P63, P6 5, P67, or keep them open. Input “H” or “L”, or keep them open. Input “H” or “L”, or keep them open. Input “H” or “L”, or keep them open. Input “H” or “L”, or keep them open. Input “H” or “L”, or keep them open. Keep this open. P40–P47 P50–P57 P60–P67 P70–P77 P80–P83 P90–P97 PA0–PA7 PB0–PB 6 VEE Input port P4 Input port P5 Input port P6 Input port P7 Input port P8 Input port P9 Input port PA Input port PB Pull-down power supply Input Input Input Input Input Input Input Input 78 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER A14 A11 A12 A13 A10 A15 A16 WE A0 A1 CE 6.8 kΩ *P27/FLD7 *P26/FLD6 *P25/FLD5 D5 *P24/FLD4 D4 *P23/FLD3 D3 *P22/FLD2 D2 *P21/FLD1 D1 *P20/FLD0 D0 VEE PB6/SIN1 PB5/SOUT1 PB4/SCLK11 PB3/SSTB1 PB2/SBUSY1 PB1/SRDY1 PB0/SCLK12/SVIN/DA AVSS VREF PA7/AN7 PA6/AN6 D7 D6 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 *P00/FLD8 *P01/FLD9 *P02/FLD10 *P03/FLD11 *P04/FLD12 *P05/FLD13 *P06/FLD14 *P07/FLD15 *P10/FLD16 *P11/FLD17 *P12/FLD18 *P13/FLD19 *P14/FLD20 *P15/FLD21 *P16/FLD22 *P17/FLD23 *P30/FLD24 *P31/FLD25 *P32/FLD26 *P33/FLD27 *P34/FLD28 *P35/FLD29 *P36/FLD30 *P37/FLD31 *P40/FLD32 *P41/FLD33 *P42/FLD34 *P43/FLD35 *P44/FLD36 *P45/FLD37 OE A2 A7 A3 A4 A5 A6 A8 A9 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 M38B79FFFP 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 *P46/FLD38 *P47/FLD39 *P50/FLD40 *P51/FLD41 *P52/FLD42 *P53/FLD43 *P54/FLD44 *P55/FLD45 *P56/FLD46 *P57/FLD47 *P60/FLD48 *P61/FLD49 *P62/FLD50 *P63/FLD51 P64/RxD/FLD52 P65/TxD/FLD53 P66/SCLK21/FLD54 P67/SRDY2/SCLK22/FLD55 P70/INT0 P71/INT1 Vss Vcc Fig. 85 Pin connection of M38B79FF when operating in parallel input/output mode PA5/AN5 PA4/AN4 PA3/AN3 PA2/AN2 PA1/AN1 PA0/AN0 P97/BUZ02/AN15 P96/PWM0/AN14 P95/RTP0/AN13 P94/RTP1/AN12 P93/SRDY3/AN11 P92/SCLK3/AN10 P91/SOUT3/AN9 P90/SIN3/AN8 P83/CNTR0/CNTR2 P82/CNTR1 C N VS S Vpp RESET P81/XCOUT P80/XCIN VS S XIN XOUT VCC P77/INT4/BUZ01 P76/T3OUT P75/T1OUT P74/PWM1 P73/INT3/DIMOUT P72/INT2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 ✻ ✻ : Connect to the ceramic oscillation circuit. * : High-breakdown-voltage output port: Totaling 52 Package type : 100P6S-A indicates the flash memory pin. 79 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Read-only Mode The microcomputer enters the read-only mode by applying V PPL to the V PP pin. In this mode, the user can input the address of a memory location to be read and the control signals at the timing shown in Figure 86, and the M38B79FF will output the contents of the user ’s specified address from data I/O pin to the external. In this mode, the user cannot perform any operation other than read. VIH Address VIL tRC VIH CE VIL ta(CE) VIH OE VIL VIH WE VIL VOH Data VOL Floating ta(OE) tOLZ tCLZ ta(AD) Dout tDH Floating tWRR tDF Valid address Fig. 86 Read timing Read/Write Mode The microcomputer enters the read/write mode by applying VPP H to the VPP pin. In this mode, the user must first input a software command to choose the operation (e. g., read, program, or erase) to be performed on the flash memory (this is called the first cycle), and then input the information necessary for execution of the command (e.g, address and data) and control signals (this is called the second cycle). When this is done, the M38B79FF executes the specified operation. Table 15 Software command (parallel input/output mode) Symbol Read Program Program verify Erase Erase verify Reset Device identification First cycle Address input × × × × Verify address × × Table 15 shows the software commands and the input/output information in the first and the second cycles. The input address is ___ latched internally at the falling edge of the WE input; software commands and other input data are latched internally at the rising ___ edge of the WE input. The following explains each software command. Refer to Figures 87 to 89 for details about the signal input/output timings. Data input 0016 4016 C0 16 2016 A016 FF16 9016 Second cycle Address input Data I/O Read address Read data (Output) Program address Program data (Input) × Verify data (Output) × 2016 (Input) × Verify data (Output) × FF16 (Input) ADI DDI (Output) Note: ADI = Device identification address : manufacturer’s code 0000016, device code 00001 16 DDI = Device identification data : manufacturer’s code 1C16, device code D0 16 × can be V IL or VIH. 80 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER q Read command The microcomputer enters the read mode by inputting command code “00 16” in the first cycle. The command code is latched into ___ the internal command latch at the rising edge of the WE input. When the address of a memory location to be read is input in the second cycle, with control signals input at the timing shown in Figure 87, the M38B79FF outputs the contents of the specified address from the data I/O pins to the external. The read mode is retained until any other command is latched into the command latch. Consequently, once the M38B79FF enters the read mode, the user can read out the successive memory contents simply by changing the input address and executing the second cycle only. Any command other than the read command must be input beginning from its command code over again each time the user execute it. The contents of the command latch immediately after power-on is 0016. VIH Address VIL tWC VIH CE VIL tCS VIH OE VIL tRRW VIH WE VIL ta(OE) tDS VIH Data VIL tVSC VPPH VPP VPPL 0016 tDH tOLZ tCLZ ta(AD) Dout tDH tWP tWRR tDF tCH ta(CE) tRC Valid address Fig. 87 Timings during reading 81 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER q Program command The microcomputer enters the program mode by inputting command code “4016 ” in the first cycle. The command code is latched ___ into the internal command latch at the rising edge of the WE input. When the address which indicates a program location and data is input in the second cycle, the M38B79FF internally latches the ad___ dress at the falling edge of the WE input and the data at the rising ___ edge of the WE input. The M38B79FF starts programming at the ___ rising edge of the WE input in the second cycle and finishes programming within 10 µ s as measured by its internal timer. Programming is performed in units of bytes. Note: A programming operation is not completed by executing the program command once. Always be sure to execute a program verify command after executing the program command. When the failure is found in this verification, the user must repeatedly execute the program command until the pass. Refer to Figure 90 for the programming flowchart. q Program verify command The microcomputer enters the program verify mode by inputting command code “C016 ” in the first cycle. This command is used to verify the programmed data after executing the program command. The command code is latched into the internal command ___ latch at the rising edge of the WE input. When control signals are input in the second cycle at the timing shown in Figure 88, the M38B79FF outputs the programmed address’s contents to the external. Since the address is internally latched when the program command is executed, there is no need to input it in the second cycle. VIH Address VIL tWC VIH CE VIL tCS tCH VIH OE VIL tRRW tWP VIH WE VIL tDS VIH Data VIL tVSC VPPH VPP VPPL 4016 tDH Program verify Program address tAS tAH Program tCS tCH tCS tCH tWPH tWP tDP tWP tWRR tDS tDS DIN tDH C016 tDH Dout Verify data output Fig. 88 Input/output timings during programming (Verify data is output at the same timing as for read.) 82 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER q Erase command The erase command is executed by inputting command code 2016 in the first cycle and command code 2016 a gain in the second cycle. The command code is latched into the internal command ___ latch at the rising edges of the WE input in the first cycle and in the second cycle, respectively. The erase operation is initiated at ___ the rising edge of the WE input in the second cycle, and the memory contents are collectively erased within 9.5 ms as measured by the internal timer. Note that data 00 16 must be written to all memory locations before executing the erase command. Note: An erase operation is not completed by executing the erase command once. Always be sure to execute an erase verify command after executing the erase command. When the failure is found in this verification, the user must repeatedly execute the erase command until the pass. Refer to Figure 90 for the erase flowchart. q Erase verify command The user must verify the contents of all addresses after completing the erase command. The microcomputer enters the erase verify mode by inputting the verify address and command code A016 in the first cycle. The address is internally latched at the fall___ ing edge of the WE input, and the command code is internally ___ latched at the rising edge of the WE input. When control signals are input in the second cycle at the timing shown in Figure 89, the M38B79FF outputs the contents of the specified address to the external. Note: If any memory location where the contents have not been erased is found in the erase verify operation, execute the operation of “erase → erase verify” over again. In this case, however, the user does not need to write data 0016 to memory locations before erasing. VIH Address VIL tWC VIH CE VIL tCS tCH VIH OE VIL tRRW tWP VIH WE VIL tDS VIH Data VIL tVSC VPPH VPP VPPL tDH tDH 2016 2016 tDS tWPH tWP tDE tCS tCH Erase Erase verify Verify address tAS tAH tCS tCH tWP tWRR tDS A016 Dout Verify data output tDH Fig. 89 Input/output timings during erasing (verify data is output at the same timing as for read.) 83 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER q Reset command The reset command provides a means of stopping execution of the erase or program command safely. If the user inputs command code FF 16 in the second cycle after inputting the erase or program command in the first cycle and again input command code FF 16 in the third cycle, the erase or program command is disabled (i.e., reset), and the M38B79FF is placed in the read mode. If the reset command is executed, the contents of the memory does not change. q Device identification code command By inputting command code 9016 in the first cycle, the user can read out the device identification code. The command code is latched into the internal command latch at the rising edge of the ___ WE input. At this time, the user can read out manufacture’s code 1C16 (i.e., MITSUBISHI) by inputting 000016 to the address input pins in the second cycle; the user can read out device code D0 16 (i. e., 1M-bit flash memory) by inputting 000116 . These command and data codes are input/output at the same timing as for read. 84 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Program START Erase START VCC = 5 V, VPP = VPPH VCC = 5 V, VPP = VPPH ADRS = first location YES ALL BYTES = 0016 ? NO X=0 WRITE PROGRAM COMMAND WRITE PROGRAM DATA DURATION = 10 µs X=X+1 WRITE PROGRAM-VERIFY COMMAND DURATION = 6 µs YES X = 25 ? NO FAIL PASS VERIFY BYTE ? PASS NO INC ADRS LAST ADRS ? NO YES WRITE READ COMMAND 0016 FAIL VERIFY BYTE ? FAIL 4016 PROGRAM ALL BYTES = 0016 ADRS = first location DIN X=0 WRITE ERASE COMMAND WRITE ERASE COMMAND DURATION = 9.5 ms X=X+1 WRITE ERASE-VERIFY COMMAND DURATION = 6 µs 2016 C016 2016 A016 X = 1000 ? YES PASS VERIFY BYTE ? PASS VERIFY BYTE ? FAIL VPP = VPPL INC ADRS DEVICE PASSED DEVICE FAILED NO LAST ADRS ? YES WRITE READ COMMAND 0016 VPP = VPPL DEVICE PASSED DEVICE FAILED Fig. 90 Programming/Erasing algorithm flow chart 85 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Table 16 DC ELECTRICAL CHARACTERISTICS (Ta = 25 °C, VCC = 5 V ± 10 %, unless otherwise noted) Symbol ISB1 ISB2 ICC1 ICC2 ICC3 IPP1 IPP2 IPP3 VIL VIH VOH1 VOH2 VPPL VPPH VCC supply current (at standby) VCC supply current (at read) VCC supply current (at program) VCC supply current (at erase) VPP supply current (at read) VPP supply current (at program) VPP supply current (at erase) “L” input voltage “H” input voltage “H” output voltage VPP supply voltage (read only) VPP supply voltage (read/write) Parameter Test conditions __ Min. Limits Typ. VCC = 5.5 V, CE = VIH VCC = 5.5 V, __ CE = VCC ± 0.2 V __ VCC = 5.5 V, CE = VIL, tRC = 150 ns, I OUT = 0 mA VPP = VPPH VPP = VPPH 0≤VPP≤VCC VCC ➀ Apply 0 V to the CNVss/VPP pin for reset release. ➁ Set the CPU mode register. (see Figure 100) ➂ After CPU reprogramming mode control program is transferred to internal RAM, jump to this control program on RAM. (The following operations are controlled by this control program). ➃ Set “1” to the CPU reprogramming mode select bit. ➄ Apply VPPH to the CNV SS/VPP pin. ➅ Wait till CNVSS/VPP pin becomes 12 V. ➆ Read the CPU reprogramming mode monitor flag to confirm whether the CPU reprogramming mode is valid. ➇ The operation of the flash memory is executed by software-command-writing to the flash command register . Note: The following are necessary other than this: •Control for data which is input from the external (serial I/O etc.) and to be programmed to the flash memory •Initial setting for ports etc. •Writing to the watchdog timer < Release procedure > ➀ Apply 0V to the CNVSS/VPP pin. ➁ Wait till CNV SS/VPP pin becomes 0V. ➂ Set the CPU reprogramming mode select bit to “0”. Each software command is explained as follows. q Read command When “ 00 16 ” i s written to the flash command register, the M38B79FF enters the read mode. The contents of the corresponding address can be read by reading the flash memory (For instance, with the LDA instruction etc.) under this condition. The read mode is maintained until another command code is written to the flash command register. Accordingly, after setting the read mode once, the contents of the flash memory can continuously be read. After reset and after the reset command is executed, the read mode is set. b7 7 6 5 4 3 2 1 0 Flash command register (FCMD : address 0EFF16) Writing of software command • Read command • Program command • Program verify command • Erase command • Erase verify command • Reset command “0016” “4016” “C016” “2016” + “2016” “A016” “FF16” + “FF16” b0 0 0 CPU mode register (CPUM : address 003B16) Processor mode bits b1 b0 0 0 : Single-chip mode 0 1 : Not available 1 X : Not available Stack page selection bit 0 : 0 page 1 : 1 page Reserved (Do not write “0” to this bit when using XCIN–XCOUT oscillation function.) Port XC switch bit 0 : I/O port function (stop oscillating) 1 : XCIN–XCOUT oscillating function Main clock (XIN–XOUT) stop bit 0 : Oscillating 1 : Stopped Main clock division ratio selection bits b7 b6 0 0 : φ = f(XIN) (high-speed mode) 0 1 : φ = f(XIN)/4 (middle-speed mode) 1 0 : φ = f(XCIN)/2 (low-speed mode) 1 1 : Not available Note: The flash command register is write-only register. Fig. 99 Flash command register bit configuration Fig. 100 CPU mode register bit configuration in CPU rewriting mode 95 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER q Program command When “ 40 16 ” i s written to the flash command register, the M38B79FF enters the program mode. Subsequently to this, if the instruction (for instance, STA instruction) for writing byte data in the address to be programmed is executed, the control circuit of the flash memory executes the program. The erase/program busy flag of the flash memory control register is set to “1” when the program starts, and becomes “0” when the program is completed. Accordingly, after the write instruction is executed, CPU can recognize the completion of the program by polling this bit. The programmed area must be specified beforehand by the erase/ program area select bits. During programming, watchdog timer stops with “FFFF16” set. Note: A programming operation is not completed by executing the program command once. Always be sure to execute a program verify command after executing the program command. When the failure is found in this verification, the user must repeatedly execute the program command until the pass. Refer to Figure 101 for the flow chart of the programming. q Program verify command When “ C0 16” i s written to the flash command register, the M38B79FF enters the program verify mode. Subsequently to this, if the instruction (for instance, LDA instruction) for reading byte data from the address to be verified (i.e., previously programmed address), the contents which has been written to the address actually is read. CPU compares this read data with data which has been written by the previous program command. In consequence of the comparison, if not agreeing, the operation of “program → program verify” must be executed again. q Erase command When writing “2016 ” twice continuously to the flash command register, the flash memory control circuit performs erase to the area specified beforehand by the erase/program area select bits. Erase/program busy flag of the flash memory control register becomes “ 1 ” w hen erase begins, and it becomes “ 0 ” w hen erase completes. Accordingly, CPU can recognize the completion of erase by polling this bit. Data “0016 ” must be written to all areas to be erased by the program and the program verify commands before the erase command is executed. During erasing, watchdog timer stops with “FFFF16 ” set. Note: The erasing operation is not completed by executing the erase command once. Always be sure to execute an erase verify command after executing the erase command. When the failure is found in this verification, the user must repeatedly execute the erase command until the pass. Refer to Figure 101 for the erasing flowchart. q Erase verify command When “ A0 16 ” i s written to the flash command register, the M38B79FF enters the erase verify mode. Subsequently to this, if the instruction (for instance, LDA instruction) for reading byte data from the address to be verified, the contents of the address is read. CPU must erase and verify to all erased areas in a unit of address. If the address of which data is not “FF 16” (i.e., data is not erased) is found, it is necessary to discontinue erasure verification there, and execute the operation of “erase → erase verify” again. Note: By executing the operation of “erase → erase verify” again when the memory not erased is found. It is unnecessary to write data “0016” before erasing in this case. q Reset command The reset command is a command to discontinue the program or erase command on the way. When “FF16” is written to the command register two times continuously after “4016” or “2016” is written to the flash command register, the program, or erase command becomes invalid (reset), and the M38B79FF enters the reset mode. The contents of the memory does not change even if the reset command is executed. DC Electric Characteristics Note: The characteristic concerning the flash memory part are the same as the characteristic of the parallel I/O mode. AC Electric Characteristics Note: The characteristics are the same as the characteristic of the microcomputer mode. 96 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Program START Erase START ADRS = first location YES ALL BYTES = 0016 ? NO X=0 WRITE PROGRAM COMMAND WRITE PROGRAM DATA WAIT 1µs 4016 PROGRAM ALL BYTES = 0016 ADRS = first location DIN X=0 WRITE ERASE COMMAND 2016 NO ERASE PROGRAM BUSY FLAG = 0 YES X=X+1 WRITE PROGRAM-VERIFY COMMAND DURATION = 6 µs WRITE ERASE COMMAND WAIT 1µs C016 2016 NO ERASE PROGRAM BUSY FLAG = 0 YES X=X+1 X = 25 ? NO FAIL YES WRITE ERASE-VERIFY COMMAND PASS DURATION = 6 µs A016 VERIFY BYTE ? PASS VERIFY BYTE ? FAIL X = 1000 ? INC ADRS NO LAST ADRS ? NO YES WRITE READ COMMAND 0016 PASS DEVICE PASSED DEVICE FAILED NO INC ADRS LAST ADRS ? YES WRITE READ COMMAND FAIL YES PASS VERIFY BYTE ? VERIFY BYTE ? FAIL 0016 DEVICE PASSED DEVICE FAILED Fig. 101 Flowchart of program/erase operation at CPU reprogramming mode 97 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER NOTES ON PROGRAMMING Processor Status Register The contents of the processor status register (PS) after a reset are undefined, except for the interrupt disable flag (I) which is “1.” After a reset, initialize flags which affect program execution. In particular, it is essential to initialize the index X mode (T) and the decimal mode (D) flags because of their effect on calculations. Serial I/O •Using an external clock When using an external clock, input “H” to the external clock input pin and clear the serial I/O interrupt request bit before executing serial I/O transfer and serial I/O automatic transfer. •Using an internal clock When using an internal clock, set the synchronous clock to the internal clock, then clear the serial I/O interrupt request bit before executing serial I/O transfer and serial I/O automatic transfer. Interrupts The contents of the interrupt request bits do not change immediately after they have been written. After writing to an interrupt request register, execute at least one instruction before performing a BBC or BBS instruction. Automatic Transfer Serial I/O When using the automatic transfer serial I/O mode of the serial I/ O1, set an automatic transfer interval as the following. Otherwise the serial data might be incorrectly transmitted/received. •Set an automatic transfer interval for each 1-byte data transfer as the following: (1) Not using FLD controller Keep the interval for 5 cycles or more of internal system clock from clock rising of the last bit of 1-byte data. (2) Using FLD controller (a) Not using gradation display Keep the interval for 17 cycles or more of internal system clock from clock rising of the last bit of 1-byte data. (b) Using gradation display Keep the interval for 27 cycles or more of internal system clock from clock rising of the last bit of 1-byte data. Decimal Calculations • To calculate in decimal notation, set the decimal mode flag (D) to “1”, then execute an ADC or SBC instruction. After executing an ADC or SBC instruction, execute at least one instruction before executing a SEC, CLC, or CLD instruction. • In decimal mode, the values of the negative (N), overflow (V), and zero (Z) flags are invalid. Timers If a value n (between 0 and 255) is written to a timer latch, the frequency division ratio is 1/(n+1). Multiplication and Division Instructions • The index X mode (T) and the decimal mode (D) flags do not affect the MUL and DIV instruction. • The execution of these instructions does not change the contents of the processor status register. A-D Converter The comparator uses capacitive coupling amplifier whose charge will be lost if the clock frequency is too low. Therefore, make sure that f(XIN) is at least on 250 kHz during an A-D conversion. Do not execute the STP or WIT instruction during an A-D conversion. Ports The contents of the port direction registers cannot be read. The following cannot be used: • The data transfer instruction (LDA, etc.) • The operation instruction when the index X mode flag (T) is “1” • The instruction with the addressing mode which uses the value of a direction register as an index • The bit-test instruction (BBC or BBS, etc.) to a direction register • The read-modify-write instructions (ROR, CLB, or SEB, etc.) to a direction register. Use instructions such as LDM and STA, etc., to set the port direction registers. D-A Converter The accuracy of the D-A converter becomes rapidly poor under the VCC = 4.0 V or less condition; a supply voltage of VCC ≥ 4.0 V is recommended. When a D-A converter is not used, set the value of D-A conversion register to “0016”. Instruction Execution Time The instruction execution time is obtained by multiplying the period of the internal clock φ b y the number of cycles needed to execute an instruction. The number of cycles required to execute an instruction is shown in the list of machine instructions. The period of the internal clock φ is half of the XIN period in highspeed mode. 98 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER NOTES ON USAGE Handling of Power Source Pins In order to avoid a latch-up occurrence, connect a capacitor suitable for high frequencies as bypass capacitor between power source pin (VCC p in) and GND pin (VSS p in), between power source pin (VCC pin) and analog power source input pin (AVSS pin), and between program power source pin (CNVss/V PP) and GND pin for flash memory version when on-board reprogramming is executed. Besides, connect the capacitor to as close as possible. For bypass capacitor which should not be located too far from the pins to be connected, a ceramic capacitor of 0.01 µ F–0.1 µF is recommended. Flash Memory Version The CNVSS pin is connected to the internal memory circuit block by a low-ohmic resistance, since it has the multiplexed function to be a programmable power source pin (VPP pin) as well. To improve the noise reduction, connect a track between CNV SS pin and VSS pin or VCC pin with 1 to 10 k Ω resistance. The mask ROM version track of CNV SS pin has no operational interference even if it is connected to Vss pin or Vcc pin via a resistor. DATA REQUIRED FOR MASK ORDERS The following are necessary when ordering a mask ROM production: 1.Mask ROM Confirmation Form 2.Mark Specification Form 3.Data to be written to ROM, in EPROM form (three identical copies) or in one floppy disk. 99 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER ELECTRICAL CHARACTERISTICS Table 22 Absolute maximum ratings Symbol VCC VEE VI VI VI VI VO Parameter Power source voltages Pull-down power source voltages Input voltage P64–P67, P70 –P77, P80–P83 , P90–P97, PA0–PA7, PB0–PB6 Input voltage P10–P17, P30 –P37, P40–P47 , P50–P57, P60 –P63 Input voltage RESET, XIN, CNV SS Input voltage XCIN Output voltage P00–P07, P10 –P17, P20–P27 , P30–P37, P40 –P47, P50–P57 , P60–P63 Output voltage P64–P67, P80–P83 , P70–P77, P90–P97, PA0–PA7, PB0–PB6, XOUT, XCOUT Power dissipation Operating temperature Storage temperature Conditions All voltages are based on VSS. Output transistors are cut off. Ratings –0.3 to 6.5 VCC –45 to VCC +0.3 –0.3 to V CC +0.3 VCC –45 to VCC +0.3 –0.3 to VCC +0.3 –0.3 to VCC +0.3 VCC –45 to VCC +0.3 Unit V V V V V V V VO –0.3 to VCC +0.3 V Pd Topr Tstg Ta = –20 to 65 °C Ta = 65 to 85 °C 800 800 –12.5 ✕ (Ta –65) –20 to 85 –40 to 125 mW mW °C °C Table 23 Recommended operating conditions (VCC = 4.0 to 5.5 V, Ta = –20 to 85 °C, unless otherwise noted) Symbol VCC VCC VSS VEE VREF AVSS VIA VIH VIH VIH VIH VIH VIL VIL VIL VIL VIL Parameter Power source voltage (mask ROM version) Power source voltage (flash memory version) Power source voltage Pull-down power source voltage Analog reference voltage High-speed mode Middle/Low-speed mode Min. 4.0 2.7 4.0 Vcc –43 2.0 3.0 0 0 0.75V CC 0.4V CC 0.52V CC 0.8V CC 0.8V CC 0 0 0 0 0 VCC VCC VCC VCC VCC VCC 0.25VCC 0.16VCC 0.2V CC 0.2V CC 0.2VCC Limits Typ. 5.0 5.0 5.0 0 Max. 5.5 5.5 5.5 VCC VCC VCC Unit V V V V V V V V V V V V V V V V V V V when A-D converter is used when D-A converter is used Analog power source voltage Analog input voltage AN 0–AN 15 “H” input voltage P70–P77 , P80–P83, P90 –P97, PA0–PA7 , PB0–PB6 “H” input voltage P64–P67 “H” input voltage P10–P17 , P30–P37, P40 –P47, P50–P57, P6 0–P63 “H” input voltage RxD, S CLK21, SCLK22 “H” input voltage XIN, XCIN , RESET, CNVss “L” input voltage P70–P77 , P80–P83, P90 –P97, PA0–PA7 , PB0–PB6 “L” input voltage P64–P67 “L” input voltage P10–P17 , P30–P37, P40 –P47, P50–P57, P6 0–P63 “L” input voltage RxD, S CLK21, SCLK22 “L” input voltage XIN, XCIN , RESET, CNVss 100 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Table 24 Recommended operating conditions (VCC = 4.0 to 5.5 V, Ta = –20 to 85 °C, unless otherwise noted) Symbol Σ I OH(peak) Σ I OH(peak) Σ I OL(peak) Σ I OL(peak) Σ I OH(avg) Σ I OH(avg) Σ I OL(avg) I OH(peak) I OH(peak) I OL(peak) I OH(avg) I OH(avg) I OL(avg) f(CNTR) f(XIN ) f(XCIN ) Parameter “H” total peak output current (Note 1) P00–P07, P10–P17, P20–P27, P3 0–P37, P40–P47, P50–P57, P60–P67, P70–P77 “H” total peak output current (Note 1) P80–P83, P90–P97, PA0–PA7, PB0–PB 6 “L” total peak output current (Note 1) P64–P67, P70–P7 7 “L” total peak output current (Note 1) P80–P83, P90–P97, PA0–PA7, PB0–PB 6 “H” total average output current (Note 1) P0 0–P07, P10–P17, P20–P27, P3 0–P37, P40–P47, P50–P57, P60–P63 “H” total average output current (Note 1) P6 4–P67, P70–P77, P80–P83, P9 0–P97, PA0–PA7, PB0–PB 6 “L” total average output current (Note 1) P64–P67, P70–P77, P8 0–P83, P90–P97, PA0–PA7, PB0–PB 6 “H” peak output current (Note 2) P00–P07, P10–P17, P2 0–P27, P30–P37, P40–P47, P5 0–P57, P60–P63 “H” peak output current (Note 2) P64–P67, P70–P77, P8 0–P83, P90–P97, PA0–PA7, PB0–PB 6 “L” peak output current (Note 2) P6 4–P67, P70–P77, P80–P83, P90–P97, PA0–PA7, PB0–PB 6 “H” average output current (Note 3) P0 0–P07, P10–P17, P20–P27, P3 0–P37, P40–P47, P50–P57, P60–P63 “H” average output current (Note 3) P6 4–P67, P70–P77, P80–P83, P9 0–P97, PA0–PA7, PB0–PB 6 “L” average output current (Note 3) P6 4–P67, P7 0–P77, P80–P83, P90–P97, PA0–PA7, PB0–PB 6 Clock input frequency for timers 2, 4, and X (duty cycle 50 %) Main clock input oscillation frequency (Note 4) Sub-clock input oscillation frequency (Notes 4, 5) Min. Limits Typ. Max. –240 –60 100 60 –120 –30 50 –40 –10 10 –18 –5 5 250 4.2 50 Unit mA mA mA mA mA mA mA mA mA mA mA mA mA kHz MHz kHz 32.768 Notes 1: The total output current is the sum of all the currents flowing through all the applicable ports. The total average current is an average value measured over 100 ms. The total peak current is the peak value of all the currents. 2: The peak output current is the peak current flowing in each port. 3: The average output current IOL (avg), IOH(avg) are average value measured over 100 ms. 4: When the oscillation frequency has a duty cycle of 50%. 5: W hen using the microcomputer in low-speed mode, set the sub-clock input oscillation frequency on condition that f(XCIN) < f(XIN)/3. 101 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Table 25 Electrical characteristics (VCC = 4.0 to 5.5 V, Ta = –20 to 85 °C, unless otherwise noted) Symbol VOH “H” output voltage Parameter P00–P07, P1 0–P17, P20–P27 , P30–P37, P4 0–P47, P50-P5 7, P60–P63 “H” output voltage P64–P67, P7 0–P77, P80–P83 , P90–P97, PA0–PA7, PB0–PB6 “L” output voltage P64–P67, P7 0–P77, P80–P83 , P90–P97, PA0–PA7, PB0–PB6 Hysteresis RxD, S CLK21, SCLK22, SRDY1, P70 – P73, P7 7, P82–P83, P9 0–P92, PB0, PB 2, PB4–PB6 Hysteresis RESET, XIN Hysteresis XCIN “H” input current P64–P67, P7 0–P77, P80–P83 , P90–P97, PA0–PA7, PB0–PB6 “H” input current P10–P17, P3 0–P37, P40–P47 , P50-P5 7, P60–P63 (Note) “H” input current RESET, CNVss, XCIN “H” input current XIN “L” input current P64–P67, P7 0–P77, P80–P83 , P90–P97, PA0–PA7, PB0–PB6 Test conditions IOH = –18 mA Limits Min. VCC–2.0 Typ. Max. Unit V VOH VOL VT+ –VT– IOH = –10 mA IOL = 10 mA VCC–2.0 2.0 0.4 V V V VT+ –VT– VT+ –VT– I IH I IH I IH I IH I IL 0.5 0.5 VI = V CC VI = V CC VI = V CC VI = V CC VI = V SS Pull-up “off” VCC = 5 V, VI = VSS Pull-up “on” VCC = 3 V, VI = VSS Pull-up “on” VI = V SS VI = V SS VI = V SS 5.0 5.0 5.0 4.0 –5.0 –30 –6.0 –70 –25 –140 –45 –5.0 –5.0 –4.0 V V µA µA µA µA µA µA µA µA µA µA I IL I IL I IL “L” input current “L” input current “L” input current P10–P17, P3 0–P37, P40–P47 , P50–P57, P60 –P63 (Note) RESET, CNVss, XCIN XIN Note: Except when reading ports P1, P3, P4, P5 or P6. 102 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Table 26 Electrical characteristics (VCC = 4.0 to 5.5 V, VSS = 0 V, Ta = –20 to 85 °C, unless otherwise noted) Symbol I LOAD Limits Parameter Output load current P00 –P07, P10–P17, P20 –P27, P30–P37, (P4 0–P47, P50 –P57, P60 –P63 at option) Output leak current P00 –P07, P10–P17, P20 –P27, P30–P37, P40 –P47, P50–P57, P60 –P63 “H” read current P10 –P17, P30–P37, P40 –P47, P50–P57, P60 –P63 RAM hold voltage Test conditions VEE = V CC–43 V , VOL =VCC Output transistors “off” Min. 400 Typ. 600 Max. 900 Unit µA I LEAK VEE = V CC–43 V, VOL =VCC–43 V Output transistors “off” –10 µA I READH VI = 5 V 1 µA VRAM I CC Power source current When clock is stopped High-speed mode, Vcc = 5 V, f(XIN) = 4.2 MHz f(XCIN ) = 32.768 kHz Output transistors “off” High-speed mode, Vcc = 5 V, f(XIN) = 4.2 MHz (in WIT state) f(XCIN ) = 32.768 kHz Output transistors “off” Middle-speed mode, Vcc = 5 V, f(XIN) = 4.2 MHz f(XCIN ) = stopped Output transistors “off” Middle-speed mode, Vcc = 5 V, f(XIN) = 4.2 MHz (in WIT state) f(XCIN ) = stopped Output transistors “off” Low-speed mode, Vcc = 3 V, f(XIN) = stopped f(XCIN ) = 32.768 kHz Output transistors “off” Low-speed mode, Vcc = 3 V, f(XIN) = stopped f(XCIN ) = 32.768 kHz (in WIT state) Output transistors “off” Increment when A-D conversion is executed All oscillation stopped Ta = 25 °C (in STP state) Output transistors “off” Ta = 85 °C 2 7.0 5.5 15 V mA 1 mA 3 mA 1 mA 20 55 µA 8 20 µA 0.6 0.1 1 10 mA µA µA 103 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Table 27 A-D converter characteristics (VCC = 4.0 to 5.5 V, VSS = AVSS = 0 V, Ta = –20 to 85 °C, f(XIN) = 250 kHz to 4.2 MHz in high-speed mode, unless otherwise noted) Symbol — — TCONV IVREF I IA RLADDER Resolution Absolute accuracy (excluding quantization error) Conversion time Reference input current Analog port input current Ladder resistor VREF = 5.0 V VCC = VREF = 5.12 V 61 50 150 0.5 35 ±1 Parameter Test conditions Limits Min. Typ. Max. 10 ±2.5 62 200 5.0 Unit Bits LSB tc(φ ) µA µA kΩ Table 28 D-A converter characteristics (VCC = 4.0 to 5.5 V, VSS = AVSS = 0 V, VREF = 3.0 to Vcc, Ta = –20 to 85 °C, unless otherwise noted) Symbol – – tsu RO I VREF Parameter Resolution Absolute accuracy (excluding quantization error) Setting time Output resistor Reference power source input current (Note) Test conditions Min. Limits Typ. Max. 8 1.0 2.5 3 4 3.2 Unit Bits % % µs kΩ mA VCC = 4.0–5.5 V VCC = 3.0–5.5 V 1 2.5 Note: Except ladder resistor for A-D converter 104 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER TIMING REQUIREMENTS Table 29 Timing requirements (1) (VCC = 4.0 to 5.5 V, VSS = 0 V, Ta = –20 to 85 °C, unless otherwise noted) Symbol t W(RESET) t C(X IN) t WH (XIN) t WL (XIN) t C(X CIN) t WH (XCIN) t WL (XCIN) t C(CNTR) t WH (CNTR) t WL(CNTR) t WH (INT) t WL(INT) t WH (INT2 ) t WL (INT2 ) t C(S CLK1) t WH (SCLK1 ) t WL (SCLK1) t su(SIN1-S CLK1) t h(S CLK1-S IN1) t C(S CLK2) t WH (SCLK2 ) t WL (SCLK2) t su(RxD-SCLK2 ) t h(S CLK2-RxD) t C(S CLK3) t WH (SCLK3 ) t WL (SCLK3) t su(SIN3-S CLK3) t h(S CLK3-S IN3) Parameter Reset input “L” pulse width Main clock input cycle time (XIN input) Main clock input “H” pulse width Main clock input “L” pulse width Sub-clock input cycle time (XCIN input) Sub-clock input “H” pulse width Sub-clock input “L” pulse width CNTR0–CNTR2 input cycle time CNTR0–CNTR2 input “H” pulse width CNTR0–CNTR2 input “L” pulse width INT0–INT 4 input “H” pulse width (INT2 when noise filter is not used) (Note 1) INT0–INT 4 input “L” pulse width (INT2 when noise filter is not used) (Note 1) INT2 input “H” pulse width (when noise filter is used) (Notes 1, 2) INT2 input “L” pulse width (when noise filter is used) (Notes 1, 2) Serial I/O1 clock input cycle time Serial I/O1 clock input “H” pulse width Serial I/O1 clock input “L” pulse width Serial I/O1 input setup time Serial I/O1 input hold time Serial I/O2 clock input cycle time Serial I/O2 clock input “H” pulse width Serial I/O2 clock input “L” pulse width Serial I/O2 input setup time Serial I/O2 input hold time Serial I/O3 clock input cycle time Serial I/O3 clock input “H” pulse width Serial I/O3 clock input “L” pulse width Serial I/O3 input setup time Serial I/O3 input hold time Min. 2.0 238 60 60 20 5.0 5.0 4.0 1.6 1.6 80 80 3 3 950 400 400 200 200 800 370 370 220 100 1000 400 400 200 200 Limits Typ. Max. Unit µs ns ns ns µs µs µs µs µs µs ns ns CLKs CLKs ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns Notes 1: IIDCON2, IIDCON3 = “00” when noise filter is not used IIDCON2, IIDCON3 = “01” or “10” when noise filter is used 2: Unit indicates sample clock number of noise filter. 105 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Table 30 Switching characteristics (VCC = 4.0 to 5.5 V, VSS = 0 V, Ta = –20 to 85 °C, unless otherwise noted) Symbol t WH (S CLK) t WL (SCLK) t d (SCLK1 -SOUT1) t V (S CLK1-S OUT1) t d (SCLK2 -TxD) t V (S CLK2-TxD) t d (SCLK3 -SOUT3) t V (S CLK3-S OUT3) t r (SCLK ) t f (S CLK) t r (Pch–strg) t r (Pch–weak) Notes 1: When 2: When 3: When 4: When 5: When the the the the the Parameter Serial I/O clock output “H” pulse width Serial I/O clock output “L” pulse width Serial I/O1 output delay time (Note 1) Serial I/O1 output valid time (Note 1) Serial I/O2 output delay time (Note 2) Serial I/O2 output valid time (Note 2) Serial I/O3 output delay time (Note 3) Serial I/O3 output valid time (Note 3) Serial I/O clock output rising time Serial I/O clock output falling time P-channel high-breakdodwn-voltage output rising time (Note 4) P-channel high-breakdodwn-voltage output rising time (Note 5) Test conditions CL = 100 pF CL = 100 pF Limits Min. Typ. t C(S CLK)/2–160 t C(S CLK)/2–160 0 Max. Unit ns ns ns ns ns ns ns ns ns ns ns µs 200 140 –30 200 0 CL = 100 pF CL = 100 pF CL = 100 pF VEE = Vcc –43 V CL = 100 pF VEE = Vcc –43 V 40 40 55 1.8 PB 5/S OUT1 P-channel output disable bit of the serial I/O1 control register (bit 7 of address 001A 16) is “0”. P65/TxD P-channel output disable bit of the UART control register (bit 4 of address 0038 16) is “0”. P91/S OUT3 P-channel output disable bit of the serial I/O3 control register (bit 7 of address 0EEC16) is “0”. high-breakdown voltage port drivability selection bit of the FLDC mode register (bit 7 of address 0EF416) is “0”. high-breakdown voltage port drivability selection bit of the FLDC mode register (bit 7 of address 0EF416) is “1”. Serial I/O clock output port P66/SCLK21, P67/SCLK22, P92/SCLK3, PB0/SCLK12, PB4/SCLK11 High-breakdown voltage P-channel open-drain output port P0, P1, P2, P3, P4, P5, P60–P63 CL (Note) CL VEE Note: Ports P4, P5, P60–P63 need external resistors. Fig. 102 Circuit for measuring output switching characteristics 106 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER tC(CNTR) tWH(CNTR) tWL(CNTR) 0.2VCC CNTR0,CNTR1 0.8VCC tWH(INT) tWL(INT) 0.2VCC INT0–INT4 0.8VCC tW(RESET) RESET 0.2VCC 0.8VCC tC(XIN) tWH(XIN) tWL(XIN) 0.2VCC XIN 0.8VCC tC(XCIN) tWH(XCIN) tWL(X CIN) 0.2VCC XCIN 0.8VCC tC(SCLK) tf(SCLK) tWL(SCLK) tr 0.8VCC tsu(SIN-SCLK) tsu(RxD-S CLK) th(SCLK-SIN) th(SCLK-RxD) tWH(SCLK) SCLK 0.2VCC SIN, RxD td(SCLK-SOUT) td(SCLK-TxD) 0.8VCC 0.2VCC tv(SCLK-SOUT) tv(SCLK-TxD) SOUT, TxD Fig. 103 Timing diagram 107 MITSUBISHI MICROCOMPUTERS 38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER PACKAGE OUTLINE 100P6S-A EIAJ Package Code QFP100-P-1420-0.65 HD D JEDEC Code – Weight(g) 1.58 Lead Material Alloy 42 Plastic 100pin 14✕20mm body QFP MD e 1 80 b2 100 81 I2 Recommended Mount Pad Symbol Dimension in Millimeters Min Nom Max 3.05 – – 0.1 0.2 0 2.8 – – 0.25 0.3 0.4 0.13 0.15 0.2 13.8 14.0 14.2 19.8 20.0 20.2 0.65 – – 16.5 16.8 17.1 22.5 22.8 23.1 0.4 0.6 0.8 1.4 – – – – 0.13 0.1 – – 0° 10° – 0.35 – – 1.3 – – 14.6 – – – – 20.6 HE E 30 51 31 50 A L1 A A1 A2 b c D E e HD HE L L1 x y b2 I2 MD ME A2 F b A1 e y x M Detail F Keep safety first in your circuit designs! • Mitsubishi Electric Corporation puts the maximum effort into making semiconductor products better and more reliable, but there is always the possibility that trouble may occur with them. Trouble with semiconductors may lead to personal injury, fire or property damage. Remember to give due consideration to safety when making your circuit designs, with appropriate measures such as (i) placement of substitutive, auxiliary circuits, (ii) use of non-flammable material or (iii) prevention against any malfunction or mishap. Notes regarding these materials • • • These materials are intended as a reference to assist our customers in the selection of the Mitsubishi semiconductor product best suited to the customer’s application; they do not convey any license under any intellectual property rights, or any other rights, belonging to Mitsubishi Electric Corporation or a third party. Mitsubishi Electric Corporation assumes no responsibility for any damage, or infringement of any third-party’s rights, originating in the use of any product data, diagrams, charts, programs, algorithms, or circuit application examples contained in these materials. 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Specifications subject to change without notice. c L ME REVISION HISTORY Rev. 1.0 1.1 Date Page 10/04/00 02/10/00 74 100 First Edition 38B7 GROUP DATA SHEET Description Summary 1.2 10/30/00 1 1 6 7 74 Mask options B to G are shaded to show that they cannoto be specified. Note 4 added. Page 100 Absolute maximum ratings VEE VCC–45 to VCC +0.3 VI VCC–45 to VCC +0.3 VO VCC–45 to VCC +0.3 “PRELIMINARY” in header of all pages are eliminated. Explanations of “DESCRIPTION” are partly eliminated. Oscillation frequency value of “FEATURES” are partly reviesed. Figure 3 is partly revised. Figure 4 is partly revised. “MASK OPTION OF PULL-DOWN RESISTOR” is eliminated. (1/1)