TS87C51RB2

1. Features • 80C52 Compatible – 8051 pin and instruction compatible – Four 8-bit I/O ports – Three 16-bit timer/counters – 256 bytes scratchpad RAM High-Speed Architecture – 40 MHz @ 5V, 30MHz @ 3V – X2 Speed Improvement capability (6 clocks/machine cycle) – 30 MHz @ 5V, 20 MHz @ 3V (Equivalent to – 60 MHz @ 5V, 40 MHz @ 3V) Dual Data Pointer On-chip ROM/EPROM (16K-bytes, 32K-bytes, 64K-bytes) On-chip eXpanded RAM (XRAM) (256 or 768 bytes) Programmable Clock Out and Up/Down Timer/Counter 2 Programmable Counter Array with – High Speed Output, – Compare / Capture, – Pulse Width Modulator, – Watchdog Timer Capabilities Hardware Watchdog Timer (One-time enabled with Reset-Out) 2 extra 8-bit I/O ports available on RD2 with high pin count packages Asynchronous port reset Interrupt Structure with – 7 Interrupt sources, – 4 level priority interrupt system Full duplex Enhanced UART – Framing error detection – Automatic address recognition Low EMI (inhibit ALE) Power Control modes – Idle mode – Power-down mode – Power-off Flag Once mode (On-chip Emulation) Power supply: 4.5-5V, 2.7-5.5V Temperature ranges: Commercial (0 to 70oC) and Industrial (-40 to 85 oC) Packages: PDIL40, PLCC44, VQFP44 1.4, PLCC68, VQFP64 1.4 • • • • • • High Performance 8-bit Microcontroller TS80C51RA2 TS80C51RD2 TS83C51RB2 TS83C51RC2 TS83C51RD2 TS87C51RB2 TS87C51RC2 TS87C51RD2 AT80C51RA2 AT80C51RD2 AT83C51RB2 AT83C51RC2 AT83C51RD2 AT87C51RB2 AT87C51RC2 AT87C51RD2 • • • • • • • • • • • 2. Description Atmel TS8xC51Rx2 is a high performance CMOS ROM, OTP, EPROM and ROMless versions of the 80C51 CMOS single chip 8-bit microcontroller. The TS8xC51Rx2 retains all features of the 80C51 with extended ROM/EPROM capacity (16/32/64 Kbytes), 256 bytes of internal RAM, a 7-source , 4-level interrupt system, an on-chip oscilator and three timer/counters. In addition, the TS80C51Rx2 has a Programmable Counter Array, an XRAM of 256 or 768 bytes, a Hardware Watchdog Timer, a more versatile serial channel that facili- Rev. 4188E–8051–08/06 tates multiprocessor communication (EUART) and an X2 speed improvement mechanism. The fully static design of the TS80C51Rx2 allows to reduce system power consumption by bringing the clock frequency down to any value, even DC, without loss of data. The TS80C51Rx2 has 2 software-selectable modes of reduced activity for further reduction in power consumption. In the idle mode the CPU is frozen while the timers, the serial port and the interrupt system are still operating. In the power-down mode the RAM is saved and all other functions are inoperative. PDIL40 PLCC44 VQFP44 1.4 TS80C51RA2 TS80C51RD2 TS83C51RB2 TS83C51RC2 TS83C51RD2 TS87C51RB2 TS87C51RC2 TS87C51RD2 ROM (bytes) 0 0 16k 32k 64k 0 0 0 EPROM (bytes) 0 0 0 0 0 16k 32k 64k XRAM (bytes) 256 768 256 256 768 256 256 768 TOTAL RAM (bytes) 512 1024 512 512 1024 512 512 1024 I/O 32 32 32 32 32 32 32 32 PLCC68 VQFP64 1.4 TS80C51RD2 TS83C51RD2 TS87C51RD2 ROM (bytes) 0 64k 0 EPROM (bytes) 0 0 64k XRAM (bytes) 768 768 768 TOTAL RAM (bytes) 1024 1024 1024 I/O 48 48 48 2 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 3. Block Diagram T2EX P5 RxD TxD Vcc Vss PCA ECI T2 (1) Watch Dog (3) (3) XTAL1 XTAL2 ALE/ PROG PSEN CPU EA/VPP RD WR (3) (3) Timer 0 Timer 1 INT Ctrl EUART RAM 256x8 (1) (1) (1) ROM XRAM /EPROM 0/16/32/64Kx8 256/768x8 PCA Timer2 C51 CORE IB-bus Parallel I/O Ports & Ext. Bus Port 0 Port 1 Port 2 Port 3 Port 4 Port 5 (2) (2) (3) (3) T0 RESET T1 (3) (3) P1 P2 P3 INT0 INT1 P0 P4 (1): Alternate function of Port 1 (2): Only available on high pin count packages (3): Alternate function of Port 3 3 4188E–8051–08/06 4. SFR Mapping The Special Function Registers (SFRs) of the TS80C51Rx2 fall into the following categories: • C51 core registers: ACC, B, DPH, DPL, PSW, SP, AUXR1 • I/O port registers: P0, P1, P2, P3, P4, P5 • Timer registers: T2CON, T2MOD, TCON, TH0, TH1, TH2, TMOD, TL0, TL1, TL2, RCAP2L, RCAP2H • Serial I/O port registers: SADDR, SADEN, SBUF, SCON • Power and clock control registers: PCON • HDW Watchdog Timer Reset: WDTRST, WDTPRG • PCA registers: CL, CH, CCAPiL, CCAPiH, CCON, CMOD, CCAPMi • Interrupt system registers: IE, IP, IPH • Others: AUXR, CKCON 4 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 Table 4-1. Bit addressable 0/8 F8h B 0000 0000 P5 bit addressable 1111 1111 E0h ACC 0000 0000 CCON 00X0 0000 PSW 0000 0000 T2CON 0000 0000 P4 bit addressable 1111 1111 B8h IP X000 000 P3 1111 1111 IE 0000 0000 P2 1111 1111 SCON 0000 0000 P1 1111 1111 TCON 0000 0000 P0 1111 1111 0/8 TMOD 0000 0000 SP 0000 0111 1/9 TL0 0000 0000 DPL 0000 0000 2/A TL1 0000 0000 DPH 0000 0000 3/B 4/C 5/D 6/E TH0 0000 0000 TH1 0000 0000 AUXR XXXXXX00 CKCON XXXX XXX0 PCON 00X1 0000 7/F SBUF XXXX XXXX SADDR 0000 0000 AUXR1 XXXX0XX0 WDTRST XXXX XXXX WDTPRG XXXX X000 SADEN 0000 0000 IPH X000 0000 T2MOD XXXX XX00 RCAP2L 0000 0000 RCAP2H 0000 0000 TL2 0000 0000 TH2 0000 0000 P5 byte addressable 1111 1111 BFh CMOD 00XX X000 CCAPM0 X000 0000 CCAPM1 X000 0000 CCAPM2 X000 0000 CCAPM3 X000 0000 CCAPM4 X000 0000 CL 0000 0000 CCAP0L XXXX XXXX CCAP1L XXXX XXXX CCAPL2L XXXX XXXX CCAPL3L XXXX XXXX CCAPL4L XXXX XXXX Non Bit addressable 1/9 CH 0000 0000 2/A CCAP0H XXXX XXXX 3/B CCAP1H XXXX XXXX 4/C CCAPL2H XXXX XXXX 5/D CCAPL3H XXXX XXXX 6/E CCAPL4H XXXX XXXX 7/F FFh All SFRs with their address and their reset value F0h F7h E8h EFh E7h D8h DFh D0h D7h C8h CFh C0h C7h B0h B7h A8h AFh A0h A7h 98h 9Fh 90h 97h 88h 8Fh 80h 87h 4188E–8051–08/06 devreser 5 5. Pin Configuration P1.0 / T2 P1.1 / T2EX P1.2 P1.3 P1.4 P1.5 P1.6 P1.7 RST P3.0/RxD P3.1/TxD P3.2/INT0 P3.3/INT1 1 2 3 4 5 6 7 8 9 10 PDIL/ 11 12 CDIL40 13 14 P3.4/T0 P3.5/T1 15 P3.6/WR 16 P3.7/RD 17 XTAL2 18 XTAL1 19 VSS 20 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 VCC P0.0 / A0 P0.1 / A1 P0.2 / A2 P0.3 / A3 P0.4 / A4 P0.5 / A5 P0.6 / A6 P0.7 / A7 EA/VPP ALE/PROG PSEN P2.7 / A15 P2.6 / A14 P2.5 / A13 P2.4 / A12 P2.3 / A11 P2.2 / A10 P2.1 / A9 P2.0 / A8 P1.5 P1.6 P1.7 RST P3.0/RxD NIC* P3.1/TxD P3.2/INT0 P3.3/INT1 P3.4/T0 P3.5/T1 P1.4 P1.3 P1.2 P1.1/T2EX P1.0/T2 VSS1/NIC* VCC P0.0/AD0 P0.1/AD1 P0.2/AD2 P0.3/AD3 6 5 4 3 2 1 44 43 42 41 40 7 8 9 10 11 12 13 14 15 16 17 39 38 37 36 35 34 33 32 31 30 29 P0.4/AD4 P0.5/AD5 P0.6/AD6 P0.7/AD7 EA/VPP NIC* ALE/PROG PSEN P2.7/A15 P2.6/A14 P2.5/A13 PLCC/CQPJ 44 18 19 20 21 22 23 24 25 26 27 28 P3.6/WR P3.7/RD XTAL2 XTAL1 VSS NIC* P2.0/A8 P2.1/A9 33 32 31 30 29 28 27 26 25 24 23 P0.4/AD4 P0.5/AD5 P0.6/AD6 P0.7/AD7 EA/VPP NIC* ALE/PROG PSEN P2.7/A15 P2.6/A14 P2.5/A13 P2.2/A10 P2.3/A11 P2.4/A12 VQFP44 1.4 44 43 42 41 40 39 38 37 36 35 34 P1.5 P1.6 P1.7 RST P3.0/RxD NIC* P3.1/TxD P3.2/INT0 P3.3/INT1 P3.4/T0 P3.5/T1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 P3.6/WR P3.7/RD XTAL2 XTAL1 VSS NIC* P2.0/A8 P2.1/A9 P2.2/A10 P2.3/A11 P2.4/A12 *NIC: No Internal Connection 6 AT/TS8xC51Rx2 4188E–8051–08/06 P1.4 P1.3 P1.2 P1.1/T2EX P1.0/T2 VSS1/NIC* VCC P0.0/AD0 P0.1/AD1 P0.2/AD2 P0.3/AD3 noitcennoClanretnI oN :CIN PP P 33P 3 PP323 . . . . 33 / 0 /1 . / .II/ 5 4N N TNN R NNN R P P P P / / TTTT x I I x I I IS 1 1 1 4 . . . . 1 0 1 0DCCDCCC T 7 6 5 2 3.4P RW/6.3P 4.4P DR/7.3P 2LATX 1LATX 5.4P SSV CIN 6.4P 8A/0.2P 9A/1.2P 01A/2.2P 7.4P 11A/3.2P 21A/4.2P 23 13 03 92 82 72 62 52 42 32 22 12 02 91 81 71 33 61 43 51 53 41 63 31 73 21 83 11 93 01 04 9 14 8 24 7 34 6 44 5 54 4 64 3 74 2 84 1 94 05 15 25 35 45 55 65 75 85 95 06 16 26 36 46 4.1P 1.4P 3.1P 2.1P XE2T/1.1P 0.4P 2T/0.1P SSV CCV 7.5P 0DA/0.0P 1DA/1.0P 6.5P 2DA/2.0P 3DA/3.0P 5.5P P P P P P P SANA P P P P P P 5 25522PL IE000 550 0. 5. 1. 2. 6. 7. E E C / 7. 6. 5. 3. 4. 4. A/ A/ A/ A/ N R/ V D/ D/ D/ PP 1 1 1 O PAAA D 3 45 765 4 G 3.4P RW/6.3P 4.4P DR/7.3P 2LA TX 1LA TX 5.4P SSV CIN 6.4P 8A/0.2P 9A/1.2P 01A/2.2P 7.4P 11A/3.2P 21A/4.2P 0.5P PPP P 333 3 P P 3. 2. 1. 0. 33II 5. 4. N/ N/ T/ N N N N R/ N N N R P P P xIIIS111 T/ T/ T T D C C C C D C C C T 7. 6. 5. 1010x I I I I 34 24 14 04 93 83 73 63 53 43 33 23 13 03 92 82 72 44 62 52 54 64 42 74 32 84 22 94 12 05 02 15 91 25 81 35 71 45 61 55 51 65 41 75 31 85 21 95 11 06 01 16 26 36 46 56 66 76 86 1 2 3 4 5 6 7 8 9 PPPP PNSANEPNPP PPP 2 5 5 2 2 IP L I 0I00550 5. 1. 2. 6. 7. C E E C A/ 7. C 6. 5. 3. 4. 4/. A/ A/ A/ N R/ V A/ A/ A/ A P PD DD 1 11 D P7 3 45 O 65 4 G PLCC 68 2.4P 4.1P 1.4P 3.1P 2.1P XE2T/1.1P 0.4P 2T/0.1P CIN CCV 7.5P 0DA/0.0P 1DA/1.0P 6.5P 2DA/2.0P 3DA/3.0P 5.5P 4188E–8051–08/06 VQFP64 1.4 AT/TS8xC51Rx2 7 Pin Number Mnemonic VSS Vss1 VCC P0.0-P0.7 40 39-32 DIL 20 LCC 22 1 44 43-36 VQFP 1.4 16 39 38 37-30 Type I I I I/O Name And Function Ground: 0V reference Optional Ground: Contact the Sales Office for ground connection. Power Supply: This is the power supply voltage for normal, idle and power-down operation Port 0: Port 0 is an open-drain, bidirectional I/O port. Port 0 pins that have 1s written to them float and can be used as high impedance inputs. Port 0 pins must be polarized to Vcc or Vss in order to prevent any parasitic current consumption. Port 0 is also the multiplexed low-order address and data bus during access to external program and data memory. In this application, it uses strong internal pull-up when emitting 1s. Port 0 also inputs the code bytes during EPROM programming. External pull-ups are required during program verification during which P0 outputs the code bytes. Port 1: Port 1 is an 8-bit bidirectional I/O port with internal pull-ups. Port 1 pins that have 1s written to them are pulled high by the internal pull-ups and can be used as inputs. As inputs, Port 1 pins that are externally pulled low will source current because of the internal pull-ups. Port 1 also receives the low-order address byte during memory programming and verification. Alternate functions for Port 1 include: 1 2 3 4 5 6 7 8 P2.0-P2.7 21-28 2 3 4 5 6 7 8 9 24-31 40 41 42 43 44 45 46 47 18-25 I/O I I I/O I/O I/O I/O I/O I/O T2 (P1.0): Timer/Counter 2 external count input/Clockout T2EX (P1.1): Timer/Counter 2 Reload/Capture/Direction Control ECI (P1.2): External Clock for the PCA CEX0 (P1.3): Capture/Compare External I/O for PCA module 0 CEX1 (P1.4): Capture/Compare External I/O for PCA module 1 CEX0 (P1.5): Capture/Compare External I/O for PCA module 2 CEX0 (P1.6): Capture/Compare External I/O for PCA module 3 CEX0 (P1.7): Capture/Compare External I/O for PCA module 4 Port 2: Port 2 is an 8-bit bidirectional I/O port with internal pull-ups. Port 2 pins that have 1s written to them are pulled high by the internal pull-ups and can be used as inputs. As inputs, Port 2 pins that are externally pulled low will source current because of the internal pull-ups. Port 2 emits the high-order address byte during fetches from external program memory and during accesses to external data memory that use 16bit addresses (MOVX @DPTR).In this application, it uses strong internal pull-ups emitting 1s. During accesses to external data memory that use 8-bit addresses (MOVX @Ri), port 2 emits the contents of the P2 SFR. Some Port 2 pins (P2.0 to P2.5) receive the high order address bits during EPROM programming and verification: Port 3: Port 3 is an 8-bit bidirectional I/O port with internal pull-ups. Port 3 pins that have 1s written to them are pulled high by the internal pull-ups and can be used as inputs. As inputs, Port 3 pins that are externally pulled low will source current because of the internal pull-ups. Some Port 3 pins (P3.4 to P3.5) receive the high order address bits during EPROM programming and verification. Port 3 also serves the special features of the 80C51 family, as listed below. 10 11 11 13 5 7 I O RXD (P3.0): Serial input port TXD (P3.1): Serial output port P1.0-P1.7 1-8 2-9 40-44 1-3 I/O P3.0-P3.7 10-17 11, 13-19 5, 7-13 I/O 8 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 Pin Number Mnemonic DIL 12 13 14 15 16 17 Reset 9 LCC 14 15 16 17 18 19 10 VQFP 1.4 8 9 10 11 12 13 4 Type I I I I O O I Name And Function INT0 (P3.2): External interrupt 0 INT1 (P3.3): External interrupt 1 T0 (P3.4): Timer 0 external input T1 (P3.5): Timer 1 external input WR (P3.6): External data memory write strobe RD (P3.7): External data memory read strobe Reset: A high on this pin for two machine cycles while the oscillator is running, resets the device. An internal diffused resistor to VSS permits a power-on reset using only an external capacitor to VCC. If the hardware watchdog reaches its time-out, the reset pin becomes an output during the time the internal reset is activated. Address Latch Enable/Program Pulse: Output pulse for latching the low byte of the address during an access to external memory. In normal operation, ALE is emitted at a constant rate of 1/6 (1/3 in X2 mode) the oscillator frequency, and can be used for external timing or clocking. Note that one ALE pulse is skipped during each access to external data memory. This pin is also the program pulse input (PROG) during EPROM programming. ALE can be disabled by setting SFR’s AUXR.0 bit. With this bit set, ALE will be inactive during internal fetches. Program Store ENable: The read strobe to external program memory. When executing code from the external program memory, PSEN is activated twice each machine cycle, except that two PSEN activations are skipped during each access to external data memory. PSEN is not activated during fetches from internal program memory. External Access Enable/Programming Supply Voltage: EA must be externally held low to enable the device to fetch code from external program memory locations 0000H and 3FFFH (RB) or 7FFFH (RC), or FFFFH (RD). If EA is held high, the device executes from internal program memory unless the program counter contains an address greater than 3FFFH (RB) or 7FFFH (RC) EA must be held low for ROMless devices. This pin also receives the 12.75V programming supply voltage (VPP) during EPROM programming. If security level 1 is programmed, EA will be internally latched on Reset. Crystal 1: Input to the inverting oscillator amplifier and input to the internal clock generator circuits. Crystal 2: Output from the inverting oscillator amplifier ALE/PROG 30 33 27 O (I) PSEN 29 32 26 O EA/VPP 31 35 29 I XTAL1 19 21 15 I XTAL2 18 20 14 O 5.1 Pin Description for 64/68 pin Packages Port 4 and Port 5 are 8-bit bidirectional I/O ports with internal pull-ups. Pins that have 1s written to them are pulled high by the internal pull ups and can be used as inputs. As inputs, pins that are externally pulled low will source current because of the internal pull-ups. Refer to the previous pin description for other pins. Table 5-1. 64/68 Pin Packages Configuration Pin VSS VCC PLCC68 51 17 SQUARE VQFP64 1.4 9/40 8 9 4188E–8051–08/06 P0.0 P0.1 P0.2 P0.3 P0.4 P0.5 P0.6 P0.7 P1.0 P1.1 P1.2 P1.3 P1.4 P1.5 P1.6 P1.7 P2.0 P2.1 P2.2 P2.3 P2.4 P2.5 P2.6 P2.7 P3.0 P3.1 15 14 12 11 9 6 5 3 19 21 22 23 25 27 28 29 54 55 56 58 59 61 64 65 34 39 6 5 3 2 64 61 60 59 10 12 13 14 16 18 19 20 43 44 45 47 48 50 53 54 25 28 Pin P3.2 P3.3 P3.4 P3.5 P3.6 P3.7 RESET ALE/PROG PLCC68 40 41 42 43 45 47 30 68 SQUARE VQFP64 1.4 29 30 31 32 34 36 21 56 10 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 PSEN EA/VPP XTAL1 XTAL2 P4.0 P4.1 P4.2 P4.3 P4.4 P4.5 P4.6 P4.7 P5.0 P5.1 P5.2 P5.3 P5.4 P5.5 P5.6 P5.7 67 2 49 48 20 24 26 44 46 50 53 57 60 62 63 7 8 10 13 16 55 58 38 37 11 15 17 33 35 39 42 46 49 51 52 62 63 1 4 7 11 4188E–8051–08/06 5.2 TS80C51Rx2 Enhanced Features In comparison to the original 80C52, the TS8xC51Rx2 implements some new features, which are: • The X2 option. • The Dual Data Pointer. • The extended RAM. • The Programmable Counter Array (PCA). • The Watchdog. • The 4 level interrupt priority system. • The power-off flag. • The ONCE mode. • The ALE disabling. • Some enhanced features are also located in the UART and the timer 2. 5.3 X2 Feature The TS80C51Rx2 core needs only 6 clock periods per machine cycle. This feature called ”X2” provides the following advantages: • Divides frequency crystals by 2 (cheaper crystals) while keeping same CPU power. • Saves power consumption while keeping same CPU power (oscillator power saving). • Saves power consumption by dividing dynamically operating frequency by 2 in operating and idle modes. • Increases CPU power by 2 while keeping same crystal frequency. In order to keep the original C51 compatibility, a divider by 2 is inserted between the XTAL1 signal and the main clock input of the core (phase generator). This divider may be disabled by software. 5.3.1 Description The clock for the whole circuit and peripheral is first divided by two before being used by the CPU core and peripherals. This allows any cyclic ratio to be accepted on XTAL1 input. In X2 mode, as this divider is bypassed, the signals on XTAL1 must have a cyclic ratio between 40 to 60%. Figure 5-1 shows the clock generation block diagram. X2 bit is validated on XTAL1÷2 rising edge to avoid glitches when switching from X2 to STD mode. Figure 5-2 shows the mode switching waveforms. 12 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 Figure 5-1. Clock Generation Diagram Figure 5-2. Mode Switching Waveforms The X2 bit in the CKCON register (Table 5-2) allows to switch from 12 clock cycles per instruction to 6 clock cycles and vice versa. At reset, the standard speed is activated (STD mode). Setting this bit activates the X2 feature (X2 mode). In order to prevent any incorrect operation while operating in X2 mode, user must be aware that all peripherals using clock frequency as time reference (UART, timers, PCA...) will have their time reference divided by two. For example a free running timer generating an interrupt every 20 ms will then generate an interrupt every 10 ms. UART with 4800 baud rate will have 9600 baud rate. Note: Table 5-2. 7 - CKCON Register CKCON - Clock Control Register (8Fh) 6 Bit Mnemonic 5 4 3 2 1 0 X2 Bit Number 7 Description Reserved The value read from this bit is indeterminate. Do not set this bit. Reserved The value read from this bit is indeterminate. Do not set this bit. Reserved The value read from this bit is indeterminate. Do not set this bit. 6 - 5 - 4188E–8051–08/06 lortnoc UPC .s e l c y c k c o l c 6 : e n i h c a m et at s edoM DTS 13 CSOF g er N O C K C 2X 1 0 2 :1L ATX edoM 2X 2 LATX F 1L ATX edoM DTS kcolc UPC 2:1LATX tib 2X 1LATX Bit Number 4 Bit Mnemonic - Description Reserved The value read from this bit is indeterminate. Do not set this bit. Reserved The value read from this bit is indeterminate. Do not set this bit. Reserved The value read from this bit is indeterminate. Do not set this bit. Reserved The value read from this bit is indeterminate. Do not set this bit. CPU and peripheral clock bit Clear to select 12 clock periods per machine cycle (STD mode, FOSC=FXTAL /2). Set to select 6 clock periods per machine cycle (X2 mode, FOSC=FXTAL ). 3 - 2 - 1 - 0 X2 Reset Value = XXXX XXX0b Not bit addressable F or further details on the X2 fe ature, please refer to ANM072 ava ilable on the web (http://www.atmel.com) 14 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 5.4 Dual Data Pointer Register The additional data pointer can be used to speed up code execution and reduce code size in a number of ways. The dual DPTR structure is a way by which the chip will specify the address of an external data memory location. There are two 16-bit DPTR registers that address the external memory, and a single bit called DPS = AUXR1/bit0 (Table 5-3) that allows the program code to switch between them (Refer to Figure 5-3). Figure 5-3. Use of Dual Pointer External Data Memory 7 0 DPS DPTR1 DPTR0 AUXR1(A2H) DPH(83H) DPL(82H) Table 5-3. AUXR1 Address 0A2H AUXR1: Auxiliary Register 1 Reset value X X X X GF3 0 X X DPS 0 Symbol DPS Function Not implemented, reserved for future use (1) Data Pointer Selection. DPS 0 1 Operating Mode DPTR0 Selected DPTR1 Selected GF3 This bit is a general purpose user flag(2) . 1. User software should not write 1s to reserved bits. These bits may be used in future 8051 family products to invoke new feature. In that case, the reset value of the new bit will be 0, and its active value will be 1. The value read from a reserved bit is indeterminate. GF3 will not be available on first version of the RC devices. 15 4188E–8051–08/06 6. Application Software can take advantage of the additional data pointers to both increase speed and reduce code size, for example, block operations (copy, compare, search ...) are well served by using one data pointer as a ’source’ pointer and the other one as a "destination" pointer. ASSEMBLY LANGUAGE ; Block move using dual data pointers ; Destroys DPTR0, DPTR1, A and PSW ; note: DPS exits opposite of entry state ; unless an extra INC AUXR1 is added ; 00A2 AUXR1 EQU 0A2H ; 0000 909000MOV DPTR,#SOURCE ; address of SOURCE 0003 05A2 INC AUXR1 ; switch data pointers 0005 90A000 MOV DPTR,#DEST ; address of DEST 0008 LOOP: 0008 05A2 INC AUXR1 ; switch data pointers 000A E0 MOVX A,@DPTR ; get a byte from SOURCE 000B A3 INC DPTR ; increment SOURCE address 000C 05A2 INC AUXR1 ; switch data pointers 000E F0 MOVX @DPTR,A ; write the byte to DEST 000F A3 INC DPTR ; increment DEST address 0010 70F6JNZ LOOP ; check for 0 terminator 0012 05A2 INC AUXR1 ; (optional) restore DPS INC is a short (2 bytes) and fast (12 clocks) way to manipulate the DPS bit in the AUXR1 SFR. However, note that the INC instruction does not directly force the DPS bit to a particular state, but simply toggles it. In simple routines, such as the block move example, only the fact that DPS is toggled in the proper sequence matters, not its actual value. In other words, the block move routine works the same whether DPS is '0' or '1' on entry. Observe that without the last instruction (INC AUXR1), the routine will exit with DPS in the opposite state. 16 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 6.1 Expanded RAM (XRAM) The TS80C51Rx2 provide additional Bytes of ramdom access memory (RAM) space for increased data parameter handling and high level language usage. RA2, RB2 and RC2 devices have 256 bytes of expanded RAM, from 00H to FFH in external data space; RD2 devices have 768 bytes of expanded RAM, from 00H to 2FFH in external data space. The TS80C51Rx2 has internal data memory that is mapped into four separate segments. The four segments are: • 1. The Lower 128 bytes of RAM (addresses 00H to 7FH) are directly and indirectly addressable. • 2. The Upper 128 bytes of RAM (addresses 80H to FFH) are indirectly addressable only. • 3. The Special Function Registers, SFRs, (addresses 80H to FFH) are directly addressable only. • 4. The expanded RAM bytes are indirectly accessed by MOVX instructions, and with the EXTRAM bit cleared in the AUXR register. (See Table 6-1.) The Lower 128 bytes can be accessed by either direct or indirect addressing. The Upper 128 bytes can be accessed by indirect addressing only. The Upper 128 bytes occupy the same address space as the SFR. That means they have the same address, but are physically separate from SFR space. When an instruction accesses an internal location above address 7FH, the CPU knows whether the access is to the upper 128 bytes of data RAM or to SFR space by the addressing mode used in the instruction. • Instructions that use direct addressing access SFR space. For example: MOV 0A0H, # data, accesses the SFR at location 0A0H (which is P2). • Instructions that use indirect addressing access the Upper 128 bytes of data RAM. For example: MOV @R0, # data where R0 contains 0A0H, accesses the data byte at address 0A0H, rather than P2 (whose address is 0A0H). • The 256 or 768 XRAM bytes can be accessed by indirect addressing, with EXTRAM bit cleared and MOVX instructions. This part of memory which is physically located on-chip, logically occupies the first 256 or 768 bytes of external data memory. • With EXTRAM = 0, the XRAM is indirectly addressed, using the MOVX instruction in combination with any of the registers R0, R1 of the selected bank or DPTR. An access to XRAM will not affect ports P0, P2, P3.6 (WR ) and P3.7 (RD). For example, with EXTRAM = 0, MOVX @R0, # data w here R0 contains 0A0H, accesses the XRAM at address 0A0H rather than external memory. An access to external data memory locations higher than FFH (i.e. 0100H to FFFFH) (higher than 2FFH (i.e. 0300H to FFFFH for RD devices) will be performed with the MOVX DPTR instructions in the same way as in the standard 80C51, so with P0 and P2 as data/address busses, and P3.6 and P3.7 as write and read timing signals. Refer to Figure 6-1. For RD devices, accesses to expanded RAM from 100H to 2FFH can only be done thanks to the use of DPTR. • With EXTRAM = 1, MOVX @Ri and MOVX @DPTR will be similar to the standard 80C51. MOVX @ Ri will provide an eight-bit address multiplexed with data on Port0 and any output port pins can be used to output higher order address bits. This is to provide the external paging capability. MOVX @DPTR will generate a sixteen-bit address. Port2 outputs the highorder eight address bits (the contents of DPH) while Port0 multiplexes the low-order eight 17 4188E–8051–08/06 address bits (DPL) with data. MOVX @ Ri and MOVX @DPTR will generate either read or write signals on P3.6 (WR) and P3.7 (RD). The stack pointer (SP) may be located anywhere in the 256 bytes RAM (lower and upper RAM) internal data memory. The stack may not be located in the XRAM. Figure 6-1. Internal and External Data Memory Address FF Upper 128 bytes Internal Ram indirect accesses XRAM 256 bytes 80 80 FF FFFF FF(RA, RB, RC)/2FF (RD) Special Function Register direct accesses External Data Memory Lower 128 bytes Internal Ram direct or indirect accesses 00 00 0100 (RA, RB, RC) or 0300 (RD) 0000 Table 6-1. Auxiliary Register AUXR X X X X X X EXTRAM 0 AO 0 AUXR Address 08EH Reset value Symbol AO Function Not implemented, reserved for future use. (1) Disable/Enable ALE AO 0 1 Operating Mode ALE is emitted at a constant rate of 1/6 the oscillator frequency (or 1/3 if X2 mode is used) ALE is active only during a MOVX or MOVC instruction EXTRAM Internal/External RAM (00H-FFH) access using MOVX @ Ri/ @ DPTR EXTRAM 0 1 Operating Mode Internal XRAM access using MOVX @ Ri/ @ DPTR External data memory access 1. User software should not write 1s to reserved bits. These bits may be used in future 8051 family products to invoke new features. In that case, the reset or inactive value of the new bit will be 0, and its active value will be 1. The value read from a reserved bit is indeterminate. 18 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 6.2 Timer 2 The timer 2 in the TS80C51RX2 is compatible with the timer 2 in the 80C52. It is a 16-bit timer/counter: the count is maintained by two eight-bit timer registers, TH2 and TL2, connected in cascade. It is controlled by T2CON register (See Table 6-2) and T2MOD register (See Table 6-3). Timer 2 operation is similar to Timer 0 and Timer 1. C/T2 selects FOSC/12 (timer operation) or external pin T2 (counter operation) as the timer clock input. Setting TR2 allows TL2 to be incremented by the selected input. Timer 2 has 3 operating modes: capture, autoreload and Baud Rate Generator. These modes are selected by the combination of RCLK, TCLK and CP/RL2 (T2CON), as described in the Atmel 8-bit Microcontroller Hardware description. Refer to the Atmel 8-bit Microcontroller Hardware description for the description of Capture and Baud Rate Generator Modes. In TS80C51RX2 Timer 2 includes the following enhancements: • Auto-reload mode with up or down counter • Programmable clock-output 6.2.1 Auto-reload Mode The auto-reload mode configures timer 2 as a 16-bit timer or event counter with automatic reload. If DCEN bit in T2MOD is cleared, timer 2 behaves as in 80C52 (refer to the Atmel 8-bit Microcontroller Hardware description). If DCEN bit is set, timer 2 acts as an Up/down timer/counter as shown in Figure 6-2. In this mode the T2EX pin controls the direction of count. When T2EX is high, timer 2 counts up. Timer overflow occurs at FFFFh which sets the TF2 flag and generates an interrupt request. The overflow also causes the 16-bit value in RCAP2H and RCAP2L registers to be loaded into the timer registers TH2 and TL2. When T2EX is low, timer 2 counts down. Timer underflow occurs when the count in the timer registers TH2 and TL2 equals the value stored in RCAP2H and RCAP2L registers. The underflow sets TF2 flag and reloads FFFFh into the timer registers. The EXF2 bit toggles when timer 2 overflows or underflows according to the the direction of the count. EXF2 does not generate any interrupt. This bit can be used to provide 17-bit resolution. 19 4188E–8051–08/06 Figure 6-2. Auto-reload Mode Up/Down Counter (DCEN = 1) XTAL1 FXTAL FOSC (:6 in X2 mode) :12 0 1 T2 C/T2 T2CONreg TR2 T2CONreg T2EX: (DOWN COUNTING RELOAD VALUE) FFh FFh (8-bit) (8-bit) if DCEN=1, 1=UP if DCEN=1, 0=DOWN if DCEN = 0, up counting T2CONreg TOGGLE EXF2 TL2 (8-bit) TH2 (8-bit) TF2 T2CONreg TIMER 2 INTERRUPT RCAP2L (8-bit) RCAP2H (8-bit) (UP COUNTING RELOAD VALUE) 6.2.2 Programmable Clock-Output In the clock-out mode, timer 2 operates as a 50%-duty-cycle, programmable clock generator (See Figure 6-3) . The input clock increments TL2 at frequency F OSC/2. The timer repeatedly counts to overflow from a loaded value. At overflow, the contents of RCAP2H and RCAP2L registers are loaded into TH2 and TL2. In this mode, timer 2 overflows do not generate interrupts. The formula gives the clock-out frequency as a function of the system oscillator frequency and the value in the RCAP2H and RCAP2L registers: – - ------------------------------------------- = -------------------------------------------- 4 × ( 65536 For a 16 MHz system clock, timer 2 has a programmable frequency range of 61 Hz (FOSC/216) to 4 MHz (FOSC/4). The generated clock signal is brought out to T2 pin (P1.0). Timer 2 is programmed for the clock-out mode as follows: • Set T2OE bit in T2MOD register. • Clear C/T2 bit in T2CON register. • Determine the 16-bit reload value from the formula and enter it in RCAP2H/RCAP2L registers. • Enter a 16-bit initial value in timer registers TH2/TL2. It can be the same as the reload value or a different one depending on the application. • To start the timer, set TR2 run control bit in T2CON register. 20 AT/TS8xC51Rx2 4188E–8051–08/06 L PA C R H P A C R cs o F 2 ⁄ yc n euq e r F tu O – k co l C 2) AT/TS8xC51Rx2 It is possible to use timer 2 as a baud rate generator and a clock generator simultaneously. For this configuration, the baud rates and clock frequencies are not independent since both functions use the values in the RCAP2H and RCAP2L registers. Figure 6-3. Clock-Out Mode C/T2 = 0 XTAL1 :2 (:1 in X2 mode) TR2 T2CON reg TL2 (8-bit) TH2 (8-bit) OVERFLOW RCAP2L (8-bit) Toggle T2 Q D RCAP2H (8-bit) T2OE T2MOD reg T2EX EXEN2 T2CON reg EXF2 T2CON reg TIMER 2 INTERRUPT Table 6-2. 7 TF2 T2CON Register T2CON - Timer 2 Control Register (C8h) 6 EXF2 5 RCLK 4 TCLK 3 EXEN2 2 TR2 1 C/T2# 0 CP/RL2# 21 4188E–8051–08/06 Bit Number Bit Mnemonic Description Timer 2 overflow Flag Must be cleared by software. Set by hardware on timer 2 overflow, if RCLK = 0 and TCLK = 0. Timer 2 External Flag S et when a capture or a reload is caused by a negative transition on T2EX pin if EXEN2=1. When set, causes the CPU to vector to timer 2 interrupt routine when timer 2 interrupt is enabled. Must be cleared by software. EXF2 doesn’t cause an interrupt in Up/down counter mode (DCEN = 1) Receive Clock bit Clear to use timer 1 overflow as receive clock for serial port in mode 1 or 3. S et to use timer 2 overflow as receive clock for serial port in mode 1 or 3. Transmit Clock bit Clear to use timer 1 overflow as transmit clock for serial port in mode 1 or 3. S et to use timer 2 overflow as transmit clock for serial port in mode 1 or 3. Timer 2 External Enable bit Clear to ignore events on T2EX pin for timer 2 operation. S et to cause a capture or reload when a negative transition on T2EX pin is detected, if timer 2 is not used to clock the serial port. Timer 2 Run control bit Clear to turn off timer 2. Set to turn on timer 2. Timer/Counter 2 select bit Clear for timer operation (input from internal clock system: FOSC). S et for counter operation (input from T2 input pin, falling edge trigger). Must be 0 for clock out mode. Timer 2 Capture/Reload bit If RCLK=1 or TCLK=1, CP/RL2# is ignored and timer is forced to auto-reload on timer 2 overflow. Clear to auto-reload on timer 2 overflows or negative transitions on T2EX pin if EXEN2=1. S et to capture on negative transitions on T2EX pin if EXEN2=1. 7 TF2 6 EXF2 5 RCLK 4 TCLK 3 EXEN2 2 TR2 1 C/T2# 0 CP/RL2# Reset Value = 0000 0000b Bit addressable Table 6-3. 7 - T2MOD Register T2MOD - Timer 2 Mode Control Register (C9h) 6 5 4 3 2 1 T2OE 0 DCEN 22 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 Bit Number 7 Bit Mnemonic Description Reserved The value read from this bit is indeterminate. Do not set this bit. Reserved The value read from this bit is indeterminate. Do not set this bit. Reserved The value read from this bit is indeterminate. Do not set this bit. Reserved The value read from this bit is indeterminate. Do not set this bit. Reserved The value read from this bit is indeterminate. Do not set this bit. Reserved The value read from this bit is indeterminate. Do not set this bit. Timer 2 Output Enable bit Clear to program P1.0/T2 as clock input or I/O port. Set to program P1.0/T2 as clock output. Down Counter Enable bit Clear to disable timer 2 as up/down counter. Set to enable timer 2 as up/down counter. 6 - 5 - 4 - 3 - 2 - 1 T2OE 0 DCEN Reset Value = XXXX XX00b Not bit addressable 23 4188E–8051–08/06 6.3 Programmable Counter Array PCA The PCA provides more timing capabilities with less CPU intervention than the standard timer/counters. Its advantages include reduced software overhead and improved accuracy. The PCA consists of a dedicated timer/counter which serves as the time base for an array of five compare/capture modules. Its clock input can be programmed to count any one of the following signals: ÷ 12 (÷ 6 in X2 mode) • Oscillator frequency ÷ 4 (÷ 2 in X2 mode) • Oscillator frequency • Timer 0 overflow • External input on ECI (P1.2) Each compare/capture modules can be programmed in any one of the following modes: • rising and/or falling edge capture, • software timer, • high-speed output, or • pulse width modulator. Module 4 can also be programmed as a watchdog timer (See Section "PCA Watchdog Timer", page 33). When the compare/capture modules are programmed in the capture mode, software timer, or high speed output mode, an interrupt can be generated when the module executes its function. All five modules plus the PCA timer overflow share one interrupt vector. The PCA timer/counter and compare/capture modules share Port 1 for external I/O. These pins are listed below. If the port is not used for the PCA, it can still be used for standard I/O. PCA component 16-bit Counter 16-bit Module 0 16-bit Module 1 16-bit Module 2 16-bit Module 3 16-bit Module 4 External I/O Pin P1.2 / ECI P1.3 / CEX0 P1.4 / CEX1 P1.5 / CEX2 P1.6 / CEX3 P1.7 / CEX4 The PCA timer is a common time base for all five modules (See Figure 6-4). The timer count source is determined from the CPS1 and CPS0 bits in the CMOD SFR (See Table 6-4) and can be programmed to run at: • 1/12 the oscillator frequency. (Or 1/6 in X2 Mode) • 1/4 the oscillator frequency. (Or 1/2 in X2 Mode) • The Timer 0 overflow • The input on the ECI pin (P1.2) 24 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 Figure 6-4. PCA Timer/Counter To PCA modules Fosc /12 Fosc / 4 T0 OVF P1.2 CH CL 16 bit up/down counter overflow It CIDL Idle WDTE CPS1 CPS0 ECF CMOD 0xD9 CF CR CCF4 CCF3 CCF2 CCF1 CCF0 CCON 0xD8 Table 6-4. CMOD: PCA Counter Mode Register CIDL 0 WDTE 0 X X X CPS1 0 CPS0 0 ECF 0 CMOD Address 0D9H Reset value Symbol CIDL Function Counter Idle control: CIDL = 0 programs the PCA Counter to continue functioning during idle Mode. CIDL = 1 programs it to be gated off during idle. Watchdog Timer Enable: WDTE = 0 disables Watchdog Timer function on PCA Module 4. WDTE = 1 enables it. Not implemented, reserved for future use. (1) PCA Count Pulse Select bit 1. PCA Count Pulse Select bit 0. CPS1 0 0 1 1 CPS0 0 1 0 1 Selected PCA input. (2) Internal clock fosc/12 ( Or fosc /6 in X2 Mode). Internal clock fosc/4 ( Or fosc/2 in X2 Mode). Timer 0 Overflow External clock at ECI/P1.2 pin (max rate = fosc/ 8) WDTE CPS1 CPS0 ECF PCA Enable Counter Overflow interrupt: ECF = 1 enables CF bit in CCON to generate an interrupt. ECF = 0 disables that function of CF. 1. User software should not write 1s to reserved bits. These bits may be used in future 8051 family products to invoke new features. In that case, the reset or inactive value of the new bit will be 0, and its active value will be 1. The value read from a reserved bit is indeterminate. fosc = oscillator frequency 2. The CMOD SFR includes three additional bits associated with the PCA (See Figure 6-4 and Table 6-4). 25 4188E–8051–08/06 • The CIDL bit which allows the PCA to stop during idle mode. • The WDTE bit which enables or disables the watchdog function on module 4. • The ECF bit which when set causes an interrupt and the PCA overflow flag CF (in the CCON SFR) to be set when the PCA timer overflows. The CCON SFR contains the run control bit for the PCA and the flags for the PCA timer (CF) and each module (Refer to Table 6-5). • Bit CR (CCON.6) must be set by software to run the PCA. The PCA is shut off by clearing this bit. • Bit CF: The CF bit (CCON.7) is set when the PCA counter overflows and an interrupt will be generated if the ECF bit in the CMOD register is set. The CF bit can only be cleared by software. • Bits 0 through 4 are the flags for the modules (bit 0 for module 0, bit 1 for module 1, etc.) and are set by hardware when either a match or a capture occurs. These flags also can only be cleared by software. Table 6-5. CCON: PCA Counter Control Register CF 0 CR 0 X CCF4 0 CCF3 0 CCF2 0 CCF1 0 CCF0 0 CCON Address 0D8H Reset value Symbol Function CF PCA Counter Overflow flag. Set by hardware when the counter rolls over. CF flags an interrupt if bit ECF in CMOD is set. CF may be set by either hardware or software but can only be cleared by software. PCA Counter Run control bit. Set by software to turn the PCA counter on. Must be cleared by software to turn the PCA counter off. Not implemented, reserved for future use. (1) PCA Module 4 interrupt flag. Set by hardware when a match or capture occurs. Must be cleared by software. PCA Module 3 interrupt flag. Set by hardware when a match or capture occurs. Must be cleared by software. PCA Module 2 interrupt flag. Set by hardware when a match or capture occurs. Must be cleared by software. PCA Module 1 interrupt flag. Set by hardware when a match or capture occurs. Must be cleared by software. PCA Module 0 interrupt flag. Set by hardware when a match or capture occurs. Must be cleared by software. CR CCF4 CCF3 CCF2 CCF1 CCF0 1. User software should not write 1s to reserved bits. These bits may be used in future 8051 family products to invoke new features. In that case, the reset or inactive value of the new bit will be 0, and its active value will be 1. The value read from a reserved bit is indeterminate. The watchdog timer function is implemented in module 4 (See Figure 6-7). The PCA interrupt system is shown in Figure 6-5. 26 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 Figure 6-5. PCA Interrupt System CF PCA Timer/Counter CR CCF4 CCF3 CCF2 CCF1 CCF0 CCON 0xD8 Module 0 Module 1 To Interrupt priority decoder Module 2 Module 3 Module 4 CMOD.0 ECF ECCFn CCAPMn.0 IE.6 EC IE.7 EA PCA Modules: each one of the five compare/capture modules has six possible functions. It can perform: • 16-bit Capture, positive-edge triggered, • 16-bit Capture, negative-edge triggered, • 16-bit Capture, both positive and negative-edge triggered, • 16-bit Software Timer, • 16-bit High Speed Output, • 8-bit Pulse Width Modulator. In addition, module 4 can be used as a Watchdog Timer. Each module in the PCA has a special function register associated with it. These registers are: CCAPM0 for module 0, CCAPM1 for module 1, etc. (See Table 6-6). The registers contain the bits that control the mode that each module will operate in. • The ECCF bit (CCAPMn.0 where n=0, 1, 2, 3, or 4 depending on the module) enables the CCF flag in the CCON SFR to generate an interrupt when a match or compare occurs in the associated module. • PWM (CCAPMn.1) enables the pulse width modulation mode. • The TOG bit (CCAPMn.2) when set causes the CEX output associated with the module to toggle when there is a match between the PCA counter and the module's capture/compare register. • The match bit MAT (CCAPMn.3) when set will cause the CCFn bit in the CCON register to be set when there is a match between the PCA counter and the module's capture/compare register. • The next two bits CAPN (CCAPMn.4) and CAPP (CCAPMn.5) determine the edge that a capture input will be active on. The CAPN bit enables the negative edge, and the CAPP bit enables the positive edge. If both bits are set both edges will be enabled and a capture will occur for either transition. 27 4188E–8051–08/06 • The last bit in the register ECOM (CCAPMn.6) when set enables the comparator function. Table 6-7 shows the CCAPMn settings for the various PCA functions. . Table 6-6. CCAPMn: PCA Modules Compare/Capture Control Registers CCAPM0=0DAH CCAPM1=0DBH CCAPM2=0DCH CCAPM3=0DDH CCAPM4=0DEH Reset value Symbol ECOMn CAPPn CAPNn MATn Function Not implemented, reserved for future use. (1) Enable Comparator. ECOMn = 1 enables the comparator function. Capture Positive, CAPPn = 1 enables positive edge capture. Capture Negative, CAPNn = 1 enables negative edge capture. Match. When MATn = 1, a match of the PCA counter with this module's compare/capture register causes the CCFn bit in CCON to be set, flagging an interrupt. Toggle. When TOGn = 1, a match of the PCA counter with this module's compare/capture register causes the CEXn pin to toggle. Pulse Width Modulation Mode. PWMn = 1 enables the CEXn pin to be used as a pulse width modulated output. Enable CCF interrupt. Enables compare/capture flag CCFn in the CCON register to generate an interrupt. X ECOMn CAPPn 0 0 CAPNn 0 MATn 0 TOGn 0 PWMm 0 ECCFn 0 CCAPMn Address n=0-4 TOGn PWMn ECCFn 1. User software should not write 1s to reserved bits. These bits may be used in future 8051 family products to invoke new features. In that case, the reset or inactive value of the new bit will be 0, and its active value will be 1. The value read from a reserved bit is indeterminate. Table 6-7. ECOMn 0 X PCA Module Modes (CCAPMn Registers) CAPNn 0 0 MATn 0 0 TOGn 0 0 PWMm 0 0 ECCFn 0 X Module Function No Operation 16-bit capture by a positive-edge trigger on CEXn 16-bit capture by a negative trigger on CEXn 16-bit capture by a transition on CEXn 16-bit Software Timer / Compare mode. 16-bit High Speed Output 8-bit PWM Watchdog Timer (module 4 only) CAPPn 0 1 X X 1 1 1 1 0 1 0 0 0 0 1 1 0 0 0 0 0 0 1 1 0 1 0 0 0 1 0 X 0 0 0 0 1 0 X X X X 0 X 28 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 There are two additional registers associated with each of the PCA modules. They are CCAPnH and CCAPnL and these are the registers that store the 16-bit count when a capture occurs or a compare should occur. When a module is used in the PWM mode these registers are used to control the duty cycle of the output (See Table 6-8 & Table 6-9) Table 6-8. CCAPnH: PCA Modules Capture/Compare Registers High CCAP0H=0FAH CCAP1H=0FBH CCAP2H=0FCH CCAP3H=0FDH CCAP4H=0FEH 7 Reset value 0 6 0 5 0 4 0 3 0 2 0 1 0 0 0 CCAPnH Address n=0-4 Table 6-9. CCAPnL: PCA Modules Capture/Compare Registers Low CCAP0L=0EAH CCAP1L=0EBH CCAP2L=0ECH CCAP3L=0EDH CCAP4L=0EEH 7 Reset value 0 6 0 5 0 4 0 3 0 2 0 1 0 0 0 CCAPnL Address n=0-4 Table 6-10. CH Address 0F9H CH: PCA Counter High 7 Reset value 0 6 0 5 0 4 0 3 0 2 0 1 0 0 0 Table 6-11. CL Address 0E9H CL: PCA Counter Low 7 Reset value 0 6 0 5 0 4 0 3 0 2 0 1 0 0 0 6.3.1 PCA Capture Mode To use one of the PCA modules in the capture mode either one or both of the CCAPM bits CAPN and CAPP for that module must be set. The external CEX input for the module (on port 1) is sampled for a transition. When a valid transition occurs the PCA hardware loads the value of the PCA counter registers (CH and CL) into the module's capture registers (CCAPnL and CCAPnH). If the CCFn bit for the module in the CCON SFR and the ECCFn bit in the CCAPMn SFR are set then an interrupt will be generated (Refer to Figure 6-6). 29 4188E–8051–08/06 Figure 6-6. PCA Capture Mode CF CR CCF4 CCF3 CCF2 CCF1 CCF0 CCON 0xD8 PCA IT PCA Counter/Timer n .x eC CH Capture CL CCAPnH CCAPnL ECOMn CAPPn CAPNn MATn TOGn PWMn ECCFn CCAPMn, n= 0 to 4 0xDA to 0xDE 6.3.2 16-bit Software Timer/ Compare Mode The PCA modules can be used as software timers by setting both the ECOM and MAT bits in the modules CCAPMn register. The PCA timer will be compared to the module's capture registers and when a match occurs an interrupt will occur if the CCFn (CCON SFR) and the ECCFn (CCAPMn SFR) bits for the module are both set (See Figure 6-7). 30 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 Figure 6-7. PCA Compare Mode and PCA Watchdog Timer CCON CF Write to CCAPnL Write to CCAPnH 1 0 Enable 16 bit comparator RESET * Reset PCA IT CCAPnH CCAPnL Match CR CCF4 CCF3 CCF2 CCF1 CCF0 0xD8 CH CL PCA counter/timer ECOMn CAPPn CAPNn MATn TOGn PWMn ECCFn CCAPMn, n = 0 to 4 0xDA to 0xDE CIDL WDTE CPS1 CPS0 ECF CMOD 0xD9 * Only for Module 4 Before enabling ECOM bit, CCAPnL and CCAPnH should be set with a non zero value, otherwise an unwanted match could happen. Writing to CCAPnH will set the ECOM bit. Once ECOM set, writing CCAPnL will clear ECOM so that an unwanted match doesn’t occur while modifying the compare value. Writing to CCAPnH will set ECOM. For this reason, user software should write CCAPnL first, and then CCAPnH. Of course, the ECOM bit can still be controlled by accessing to CCAPMn register. 6.3.3 High Speed Output Mode In this mode the CEX output (on port 1) associated with the PCA module will toggle each time a match occurs between the PCA counter and the module's capture registers. To activate this mode the TOG, MAT, and ECOM bits in the module's CCAPMn SFR must be set (See Figure 68). A prior write must be done to CCAPnL and CCAPnH before writing the ECOMn bit. 31 4188E–8051–08/06 Figure 6-8. PCA High Speed Output Mode CCON CF CR CCF4 CCF3 CCF2 CCF1 CCF0 0xD8 Write to CCAPnL Reset PCA IT Write to CCAPnH 0 CCAPnH Enable 16 bit comparator CCAPnL Match 1 CH CL CEXn PCA counter/timer CCAPMn, n = 0 to 4 0xDA to 0xDE ECOMn CAPPn CAPNn MATn TOGn PWMn ECCFn Before enabling ECOM bit, CCAPnL and CCAPnH should be set with a non zero value, otherwise an unwanted match could happen. Once ECOM set, writing CCAPnL will clear ECOM so that an unwanted match doesn’t occur while modifying the compare value. Writing to CCAPnH will set ECOM. For this reason, user software should write CCAPnL first, and then CCAPnH. Of course, the ECOM bit can still be controlled by accessing to CCAPMn register. 6.3.4 Pulse Width Modulator Mode All of the PCA modules can be used as PWM outputs. Figure 6-9 shows the PWM function. The frequency of the output depends on the source for the PCA timer. All of the modules will have the same frequency of output because they all share the PCA timer. The duty cycle of each module is independently variable using the module's capture register CCAPLn. When the value of the PCA CL SFR is less than the value in the module's CCAPLn SFR the output will be low, when it is equal to or greater than the output will be high. When CL overflows from FF to 00, CCAPLn is reloaded with the value in CCAPHn. This allows updating the PWM without glitches. The PWM and ECOM bits in the module's CCAPMn register must be set to enable the PWM mode. 32 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 Figure 6-9. PCA PWM Mode CCAPnH Overflow CCAPnL “0” Enable 8 bit comparator < Š “1” CEXn CL PCA counter/timer ECOMn CAPPn CAPNn MATn TOGn PWMn ECCFn CCAPMn, n= 0 to 4 0xDA to 0xDE 6.3.5 PCA Watchdog Timer A n on-board watchdog timer is available with the PCA to improve the reliability of the system without increasing chip count. Watchdog timers are useful for systems that are susceptible to noise, power glitches, or electrostatic discharge. Module 4 is the only PCA module that can be programmed as a watchdog. However, this module can still be used for other modes if the watchdog is not needed. Figure 6-7 shows a diagram of how the watchdog works. The user preloads a 16-bit value in the compare registers. Just like the other compare modes, this 16-bit value is compared to the PCA timer value. If a match is allowed to occur, an internal reset will be generated. This will not cause the RST pin to be driven high. In order to hold off the reset, the user has three options: • 1. Periodically change the compare value so it will never match the PCA timer, • 2. periodically change the PCA timer value so it will never match the compare values, or • 3. Disable the watchdog by clearing the WDTE bit before a match occurs and then re-enable it. The first two options are more reliable because the watchdog timer is never disabled as in option #3. If the program counter ever goes astray, a match will eventually occur and cause an internal reset. The second option is also not recommended if other PCA modules are being used. Remember, the PCA timer is the time base for all modules; changing the time base for other modules would not be a good idea. Thus, in most applications the first solution is the best option. This watchdog timer won’t generate a reset out on the reset pin. 33 4188E–8051–08/06 6.4 TS80C51Rx2 Serial I/O Port The serial I/O port in the TS80C51Rx2 is compatible with the serial I/O port in the 80C52. It provides both synchronous and asynchronous communication modes. It operates as an Universal Asynchronous Receiver and Transmitter (UART) in three full-duplex modes (Modes 1, 2 and 3). Asynchronous transmission and reception can occur simultaneously and at different baud rates Serial I/O port includes the following enhancements: • Framing error detection • Automatic address recognition 6.4.1 Framing Error Detection Framing bit error detection is provided for the three asynchronous modes (modes 1, 2 and 3). To enable the framing bit error detection feature, set SMOD0 bit in PCON register (See Figure 610). Figure 6-10. Framing Error Block Diagram SM0/FE SM1 SM2 REN TB8 RB8 TI RI SCON (98h) Set FE bit if stop bit is 0 (framing error) (SMOD0 = 1) SM0 to UART mode control (SMOD = 0) SMOD1SMOD0 POF GF1 GF0 PD IDL PCON (87h) To UART framing error control When this feature is enabled, the receiver checks each incoming data frame for a valid stop bit. An invalid stop bit may result from noise on the serial lines or from simultaneous transmission by two CPUs. If a valid stop bit is not found, the Framing Error bit (FE) in SCON register (See Table 6-14.) bit is set. Software may examine FE bit after each reception to check for data errors. Once set, only software or a reset can clear FE bit. Subsequently received frames with valid stop bits cannot clear FE bit. When FE feature is enabled, RI rises on stop bit instead of the last data bit (See Figure 611 and Figure 6-12). Figure 6-11. UART Timings in Mode 1 RXD Start bit RI SMOD0=X FE SMOD0=1 D0 D1 D2 D3 D4 D5 D6 D7 Stop bit Data byte 34 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 Figure 6-12. UART Timings in Modes 2 and 3 RXD Start bit RI SMOD0=0 RI SMOD0=1 FE SMOD0=1 D0 D1 D2 D3 D4 D5 D6 D7 D8 Ninth Stop bit bit Data byte 6.4.2 Automatic Address Recognition The automatic address recognition feature is enabled when the multiprocessor communication feature is enabled (SM2 bit in SCON register is set). Implemented in hardware, automatic address recognition enhances the multiprocessor communication feature by allowing the serial port to examine the address of each incoming command frame. Only when the serial port recognizes its own address, the receiver sets RI bit in SCON register to generate an interrupt. This ensures that the CPU is not interrupted by command frames addressed to other devices. If desired, you may enable the automatic address recognition feature in mode 1. In this configuration, the stop bit takes the place of the ninth data bit. Bit RI is set only when the received command frame address matches the device’s address and is terminated by a valid stop bit. To support automatic address recognition, a device is identified by a given address and a broadcast address. Note: The multiprocessor communication and automatic address recognition features cannot be enabled in mode 0 (i.e. setting SM2 bit in SCON register in mode 0 has no effect). 6.4.3 Given Address Each device has an individual address that is specified in SADDR register; the SADEN register is a mask byte that contains don’t-care bits (defined by zeros) to form the device’s given address. The don’t-care bits provide the flexibility to address one or more slaves at a time. The following example illustrates how a given address is formed. To address a device by its individual address, the SADEN mask byte must be 1111 1111b. For example: SADDR0101 0110b SADEN1111 1100b Given0101 01XXb The following is an example of how to use given addresses to address different slaves: Slave A:SADDR1111 0001b SADEN1111 1010b Given1111 0X0Xb Slave B:SADDR1111 0011b SADEN1111 1001b Given1111 0XX1b 35 4188E–8051–08/06 Slave C:SADDR1111 0010b SADEN1111 1101b Given1111 00X1b The SADEN byte is selected so that each slave may be addressed separately. For slave A, bit 0 (the LSB) is a don’t-care bit; for slaves B and C, bit 0 is a 1. To communicate with slave A only, the master must send an address where bit 0 is clear (e.g. 1111 0000b). For slave A, bit 1 is a 1; for slaves B and C, bit 1 is a don’t care bit. To communicate with slaves B and C, but not slave A, the master must send an address with bits 0 and 1 both set (e.g. 1111 0011b). To communicate with slaves A, B and C, the master must send an address with bit 0 set, bit 1 clear, and bit 2 clear (e.g. 1111 0001b). 6.4.4 Broadcast Address A broadcast address is formed from the logical OR of the SADDR and SADEN registers with zeros defined as don’t-care bits, e.g.: SADDR0101 0110b SADEN1111 1100b Broadcast =SADDR OR SADEN1111 111Xb The use of don’t-care bits provides flexibility in defining the broadcast address, however in most applications, a broadcast address is FFh. The following is an example of using broadcast addresses: Slave A:SADDR1111 0001b SADEN1111 1010b Broadcast1111 1X11b, Slave B:SADDR1111 0011b SADEN1111 1001b Broadcast1111 1X11B, Slave C:SADDR=1111 0010b SADEN1111 1101b Broadcast1111 1111b For slaves A and B, bit 2 is a don’t care bit; for slave C, bit 2 is set. To communicate with all of the slaves, the master must send an address FFh. To communicate with slaves A and B, but not slave C, the master can send and address FBh. 6.4.5 Reset Addresses On reset, the SADDR and SADEN registers are initialized to 00h, i.e. the given and broadcast addresses are XXXX XXXXb (all don’t-care bits). This ensures that the serial port will reply to any address, and so, that it is backwards compatible with the 80C51 microcontrollers that do not support automatic address recognition. 36 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 Table 6-12. 7 SADEN - Slave Address Mask Register (B9h) 6 5 4 3 2 1 0 Reset Value = 0000 0000b Not bit addressable Table 6-13. 7 SADDR - Slave Address Register (A9h) 6 5 4 3 2 1 0 Reset Value = 0000 0000b Not bit addressable Table 6-14. 7 FE/SM0 SCON Register SCON - Serial Control Register (98h) 6 SM1 5 SM2 4 REN 3 TB8 2 RB8 1 TI 0 RI 37 4188E–8051–08/06 Bit Number Bit Mnemonic Description Framing Error bit (SMOD0=1) Clear to reset the error state, not cleared by a valid stop bit. S et by hardware when an invalid stop bit is detected. SMOD0 must be set to enable access to the FE bit Serial port Mode bit 0 Refer to SM1 for serial port mode selection. SMOD0 must be cleared to enable access to the SM0 bit Serial port Mode bit 1 SM0 SM1ModeDescriptionBaud Rate 7 FE SM0 6 SM1 0 0 1 1 0 1 0 1 0Shift RegisterFXTAL/12 (/6 in X2 mode) 18-bit UARTVariable 29-bit UARTFXTAL/64 or FXTAL/32 (/32, /16 in X2 mode) 39-bit UARTVariable 5 SM2 Serial port Mode 2 bit / Multiprocessor Communication Enable bit Clear to disable multiprocessor communication feature. Set to enable multiprocessor communication feature in mode 2 and 3, and eventually mode 1. This bit should be cleared in mode 0. Reception Enable bit Clear to disable serial reception. S et to enable serial reception. Transmitter Bit 8 / Ninth bit to transmit in modes 2 and 3 4 REN 3 TB8 Clear to transmit a logic 0 in the 9th bit. S et to transmit a logic 1 in the 9th bit. Receiver Bit 8 / Ninth bit received in modes 2 and 3 Cleared by hardware if 9th bit received is a logic 0. S et by hardware if 9th bit received is a logic 1. In mode 1, if SM2 = 0, RB8 is the received stop bit. In mode 0 RB8 is not used. 2 RB8 1 TI Transmit Interrupt flag Clear to acknowledge interrupt. Set by hardware at the end of the 8th bit time in mode 0 or at the beginning of the stop bit in the other modes. Receive Interrupt flag Clear to acknowledge interrupt. Set by hardware at the end of the 8th bit time in mode 0, see Figure 6-11. and Figure 612. in the other modes. 0 RI Reset Value = 0000 0000b Bit addressable Table 6-15. 7 SMOD1 PCON Register PCON - Power Control Register (87h) 6 SMOD0 5 4 POF 3 GF1 2 GF0 1 PD 0 IDL 38 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 Bit Number 7 Bit Mnemonic SMOD1 Description Serial port Mode bit 1 Set to select double baud rate in mode 1, 2 or 3. Serial port Mode bit 0 Clear to select SM0 bit in SCON register. Set to to select FE bit in SCON register. Reserved The value read from this bit is indeterminate. Do not set this bit. Power-Off Flag Clear to recognize next reset type. Set by hardware when VCC rises from 0 to its nominal voltage. Can also be set by software. General purpose Flag Cleared by user for general purpose usage. Set by user for general purpose usage. General purpose Flag Cleared by user for general purpose usage. Set by user for general purpose usage. Power-Down mode bit Cleared by hardware when reset occurs. Set to enter power-down mode. Idle mode bit Clear by hardware when interrupt or reset occurs. Set to enter idle mode. 6 SMOD0 5 - 4 POF 3 GF1 2 GF0 1 PD 0 IDL Reset Value = 00X1 0000b Not bit addressable Power-off flag reset value will be 1 only after a power on (cold reset). A warm reset doesn’t affect the value of this bit. 39 4188E–8051–08/06 6.5 Interrupt System The TS80C51Rx2 has a total of 7 interrupt vectors: two external interrupts (INT0 and INT1), three timer interrupts (timers 0, 1 and 2), the serial port interrupt and the PCA global interrupt. These interrupts are shown in Figure 6-13. WARNING: Note that in the first version of RC devices, the PCA interrupt is in the lowest priority. Thus the order in INT0 , TF0, INT1, TF1, RI or TI, TF2 or EXF2, PCA. Figure 6-13. Interrupt Control System IPH, IP 3 INT0 IE0 0 3 TF0 0 3 INT1 IE1 0 3 TF1 0 3 Interrupt polling sequence, decreasing from high to low priority High priority interrupt TF2 EXF2 40 TI ACP RI TI Individual Enable 0 3 0 3 0 Global Disable Low priority interrupt Each of the interrupt sources can be individually enabled or disabled by setting or clearing a bit in the Interrupt Enable register (See Table 6-17.Table 6-18.). This register also contains a global disable bit, which must be cleared to disable all interrupts at once. Each interrupt source can also be individually programmed to one out of four priority levels by setting or clearing a bit in the Interrupt Priority register (See Table 6-18.) and in the Interrupt Priority High register (See Table 6-19.). shows the bit values and priority levels associated with each combination. The PCA interrupt vector is located at address 0033H. All other vector addresses are the same as standard C52 devices. AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 Table 6-16. IPH.x 0 0 1 1 Priority Level Bit Values IP.x 0 1 0 1 Interrupt Level Priority 0 (Lowest) 1 2 3 (Highest) A low-priority interrupt can be interrupted by a high priority interrupt, but not by another low-priority interrupt. A high-priority interrupt can’t be interrupted by any other interrupt source. If two interrupt requests of different priority levels are received simultaneously, the request of higher priority level is serviced. If interrupt requests of the same priority level are received simultaneously, an internal polling sequence determines which request is serviced. Thus within each priority level there is a second priority structure determined by the polling sequence. Table 6-17. 7 EA Bit Number Bit IE Register IE - Interrupt Enable Register (A8h) 6 EC 5 ET2 4 ES 3 ET1 2 EX1 1 ET0 0 EX0 Mnemonic Description Enable All interrupt bit Clear to disable all interrupts. Set to enable all interrupts. If EA=1, each interrupt source is individually enabled or disabled by setting or clearing its own interrupt enable bit. PCA interrupt enable bit Clear to disable . Set to enable. Timer 2 overflow interrupt Enable bit Clear to disable timer 2 overflow interrupt. Set to enable timer 2 overflow interrupt. Serial port Enable bit Clear to disable serial port interrupt. Set to enable serial port interrupt. Timer 1 overflow interrupt Enable bit Clear to disable timer 1 overflow interrupt. Set to enable timer 1 overflow interrupt. External interrupt 1 Enable bit Clear to disable external interrupt 1. Set to enable external interrupt 1. Timer 0 overflow interrupt Enable bit Clear to disable timer 0 overflow interrupt. Set to enable timer 0 overflow interrupt. External interrupt 0 Enable bit Clear to disable external interrupt 0. Set to enable external interrupt 0. 7 EA 6 EC 5 ET2 4 ES 3 ET1 2 EX1 1 ET0 0 EX0 Reset Value = 0000 0000b Bit addressable 41 4188E–8051–08/06 Table 6-18. 7 Bit Number 7 IP Register IP - Interrupt Priority Register (B8h) 6 PPC Bit Mnemonic 5 PT2 Description Reserved The value read from this bit is indeterminate. Do not set this bit. PCA interrupt priority bit Refer to PPCH for priority level. Timer 2 overflow interrupt Priority bit Refer to PT2H for priority level. Serial port Priority bit Refer to PSH for priority level. Timer 1 overflow interrupt Priority bit Refer to PT1H for priority level. External interrupt 1 Priority bit Refer to PX1H for priority level. Timer 0 overflow interrupt Priority bit Refer to PT0H for priority level. External interrupt 0 Priority bit Refer to PX0H for priority level. 4 PS 3 PT1 2 PX1 1 PT0 0 PX0 6 PPC 5 PT2 4 PS 3 PT1 2 PX1 1 PT0 0 PX0 Reset Value = X000 0000b Bit addressable 42 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 Table 6-19. 7 Bit Number 7 IPH Register IPH - Interrupt Priority High Register (B7h) 6 PPCH Bit Mnemonic 5 PT2H 4 PSH 3 PT1H 2 PX1H 1 PT0H 0 PX0H Description Reserved The value read from this bit is indeterminate. Do not set this bit. PCA interrupt priority bit high. PPCH PPC Priority Level 0 0 Lowest 0 1 1 0 1 1 Highest 6 PPCH 5 PT2H Timer 2 overflow interrupt Priority High bit PT2H PT2 Priority Level 0 0 Lowest 0 1 1 0 1 1 Highest Serial port Priority High bit PSH PS Priority Level 0 0 Lowest 0 1 1 0 1 1 Highest Timer 1 overflow interrupt Priority High bit PT1H PT1 Priority Level 0 0 Lowest 0 1 1 0 1 1 Highest External interrupt 1 Priority High bit PX1H PX1 Priority Level 0 0 Lowest 0 1 1 0 1 1 Highest Timer 0 overflow interrupt Priority High bit PT0H PT0 Priority Level 0 0 Lowest 0 1 1 0 1 1 Highest External interrupt 0 Priority High bit PX0H PX0 Priority Level 0 0 Lowest 0 1 1 0 1 1 Highest 4 PSH 3 PT1H 2 PX1H 1 PT0H 0 PX0H Reset Value = X000 0000b Not bit addressable 43 4188E–8051–08/06 6.6 Idle Mode An instruction that sets PCON.0 causes that to be the last instruction executed before going into the Idle mode. In the Idle mode, the internal clock signal is gated off to the CPU, but not to the interrupt, Timer, and Serial Port functions. The CPU status is preserved in its entirety: the Stack Pointer, Program Counter, Program Status Word, Accumulator and all other registers maintain their data during Idle. The port pins hold the logical states they had at the time Idle was activated. ALE and PSEN hold at logic high levels. There are two ways to terminate the Idle. Activation of any enabled interrupt will cause PCON.0 to be cleared by hardware, terminating the Idle mode. The interrupt will be serviced, and following RETI the next instruction to be executed will be the one following the instruction that put the device into idle. The flag bits GF0 and GF1 can be used to give an indication if an interrupt occured during normal operation or during an Idle. For example, an instruction that activates Idle can also set one or both flag bits. When Idle is terminated by an interrupt, the interrupt service routine can examine the flag bits. The other way of terminating the Idle mode is with a hardware reset. Since the clock oscillator is still running, the hardware reset needs to be held active for only two machine cycles (24 oscillator periods) to complete the reset. 6.7 Power-down Mode To save maximum power, a power-down mode can be invoked by software (Refer to Table 6-15, PCON register). In power-down mode, the oscillator is stopped and the instruction that invoked power-down mode is the last instruction executed. The internal RAM and SFRs retain their value until the power-down mode is terminated. VCC can be lowered to save further power. Either a hardware reset or an external interrupt can cause an exit from power-down. To properly terminate powerdown, the reset or external interrupt should not be executed before VCC is restored to its normal operating level and must be held active long enough for the oscillator to restart and stabilize. Only external interrupts INT0 and INT1 are useful to exit from power-down. For that, interrupt must be enabled and configured as level or edge sensitive interrupt input. Holding the pin low restarts the oscillator but bringing the pin high completes the exit as detailed in Figure 6-14. When both interrupts are enabled, the oscillator restarts as soon as one of the two inputs is held low and power down exit will be completed when the first input will be released. In this case the higher priority interrupt service routine is executed. Once the interrupt is serviced, the next instruction to be executed after RETI will be the one following the instruction that put TS80C51Rx2 into power-down mode. 44 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 Figure 6-14. Power-Down Exit Waveform INT0 INT1 XTAL1 Active phase Power-down phase Oscillator restart phase Active phase Exit from power-down by reset redefines all the SFRs, exit from power-down by external interrupt does no affect the SFRs. Exit from power-down by either reset or external interrupt does not affect the internal RAM content. Note: If idle mode is activated with power-down mode (IDL and PD bits set), the exit sequence is unchanged, when execution is vectored to interrupt, PD and IDL bits are cleared and idle mode is not entered. Table 6-20. Mode Idle Idle Power-down Power-down The state of ports during idle and power-down mode Program Memory Internal External Internal External ALE 1 1 0 0 PSEN 1 1 0 0 PORT0 Port Data* Floating Port Data* Floating PORT1 Port Data Port Data Port Data Port Data PORT2 Port Data Address Port Data Port Data PORT3 Port Data Port Data Port Data Port Data * Port 0 can force a "zero" level. A "one" will leave port floating. 45 4188E–8051–08/06 6.8 Hardware Watchdog Timer The WDT is intended as a recovery method in situations where the CPU may be subjected to software upset. The WDT consists of a 14-bit counter and the WatchDog Timer ReSeT (WDTRST) SFR. The WDT is by default disabled from exiting reset. To enable the WDT, user must write 01EH and 0E1H in sequence to the WDTRST, SFR location 0A6H. When WDT is enabled, it will increment every machine cycle while the oscillator is running and there is no way to disable the WDT except through reset (either hardware reset or WDT overflow reset). When WDT overflows, it will drive an output RESET HIGH pulse at the RST-pin. 6.8.1 Using the WDT To enable the WDT, user must write 01EH and 0E1H in sequence to the WDTRST, SFR location 0A6H. When WDT is enabled, the user needs to service it by writing to 01EH and 0E1H to WDTRST to avoid WDT overflow. The 14-bit counter overflows when it reaches 16383 (3FFFH) and this will reset the device. When WDT is enabled, it will increment every machine cycle while the oscillator is running. This means the user must reset the WDT at least every 16383 machine cycle. To reset the WDT the user must write 01EH and 0E1H to WDTRST. WDTRST is a write only register. The WDT counter cannot be read or written. When WDT overflows, it will generate an output RESET pulse at the RST-pin. The RESET pulse duration is 96 x TOSC , where TOSC = 1/FOSC . To make the best use of the WDT, it should be serviced in those sections of code that will periodically be executed within the time required to prevent a WDT reset. To have a more powerful WDT, a 27 counter has been added to extend the Time-out capability, ranking from 16ms to 2s @ FOSC = 12MHz. To manage this feature, refer to WDTPRG register description, Table 6-22 (SFR0A7h). Table 6-21. WDTRST Register W DTRST Address (0A6h) 7 6 X 5 X 4 X 3 X 2 X 1 X Reset value X Write only, this SFR is used to reset/enable the WDT by writing 01EH then 0E1H in sequence. Table 6-22. 7 T4 WDTPRG Register W DTPRG Address (0A7h) 6 T3 5 T2 4 T1 3 T0 2 S2 1 S1 0 S0 46 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 Bit Number 7 6 5 4 3 2 1 0 Bit Mnemonic T4 T3 T2 T1 T0 S2 S1 S0 WDT Time-out select bit 2 WDT Time-out select bit 1 WDT Time-out select bit 0 S2 0 0 0 0 1 1 1 1 S1 0 0 1 1 0 0 1 1 S0Selected Time-out 0(214 - 1) machine cycles, 16.3 ms @ 12 MHz 1(215 - 1) machine cycles, 32.7 ms @ 12 MHz 0(216 - 1) machine cycles, 65.5 ms @ 12 MHz 1(217 - 1) machine cycles, 131 ms @ 12 MHz 0(218 - 1) machine cycles, 262 ms @ 12 MHz 1(219 - 1) machine cycles, 542 ms @ 12 MHz 0(220 - 1) machine cycles, 1.05 s @ 12 MHz 1(221 - 1) machine cycles, 2.09 s @ 12 MHz Reserved Do not try to set or clear this bit. Description Reset value XXXX X000 6.8.2 WDT during Power-down and Idle In Power-down mode the oscillator stops, which means the WDT also stops. While in Powerdown mode the user does not need to service the WDT. There are 2 methods of exiting Powerdown mode: by a hardware reset or via a level activated external interrupt which is enabled prior to entering Power-down mode. When Power-down is exited with hardware reset, servicing the WDT should occur as it normally should whenever the TS80C51Rx2 is reset. Exiting Powerdown with an interrupt is significantly different. The interrupt is held low long enough for the oscillator to stabilize. When the interrupt is brought high, the interrupt is serviced. To prevent the WDT from resetting the device while the interrupt pin is held low, the WDT is not started until the interrupt is pulled high. It is suggested that the WDT be reset during the interrupt service routine. To ensure that the WDT does not overflow within a few states of exiting of powerdown, it is best to reset the WDT just before entering powerdown. In the Idle mode, the oscillator continues to run. To prevent the WDT from resetting the TS80C51Rx2 while in Idle mode, the user should always set up a timer that will periodically exit Idle, service the WDT, and re-enter Idle mode. 47 4188E–8051–08/06 6.9 ONCETM Mode (ON Chip Emulation) The ONCE mode facilitates testing and debugging of systems using TS8xC51Rx2 without removing the circuit from the board. The ONCE mode is invoked by driving certain pins of the TS80C51Rx2; the following sequence must be exercised: • Pull ALE low while the device is in reset (RST high) and PSEN is high. • Hold ALE low as RST is deactivated. While the TS80C51Rx2 is in ONCE mode, an emulator or test CPU can be used to drive the circuit Table 26. shows the status of the port pins during ONCE mode. Normal operation is restored when normal reset is applied. Table 6-23. ALE Weak pull-up External Pin Status during ONCE Mode PSEN Weak pull-up Port 0 Float Port 1 Weak pull-up Port 2 Weak pull-up Port 3 Weak pull-up XTAL1/2 Active 48 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 7. Power-Off Flag The power-off flag allows the user to distinguish between a “cold start” reset and a “warm start” reset. A cold start reset is the one induced by VCC switch-on. A warm start reset occurs while VCC is still applied to the device and could be generated for example by an exit from power-down. The power-off flag (POF) is located in PCON register (See Table 7-1). POF is set by hardware when VCC rises from 0 to its nominal voltage. The POF can be set or cleared by software allowing the user to determine the type of reset. The POF value is only relevant with a Vcc range from 4.5V to 5.5V. For lower Vcc value, reading POF bit will return indeterminate value. Table 7-1. 7 SMOD1 Bit Number 7 PCON Register PCON - Power Control Register (87h) 6 SMOD0 Bit Mnemonic SMOD1 5 4 POF 3 GF1 2 GF0 1 PD 0 IDL Description Serial port Mode bit 1 Set to select double baud rate in mode 1, 2 or 3. Serial port Mode bit 0 Clear to select SM0 bit in SCON register. Set to to select FE bit in SCON register. Reserved The value read from this bit is indeterminate. Do not set this bit. Power-Off Flag Clear to recognize next reset type. Set by hardware when VCC rises from 0 to its nominal voltage. Can also be set by software. General purpose Flag Cleared by user for general purpose usage. Set by user for general purpose usage. General purpose Flag Cleared by user for general purpose usage. Set by user for general purpose usage. Power-Down mode bit Cleared by hardware when reset occurs. Set to enter power-down mode. Idle mode bit Clear by hardware when interrupt or reset occurs. Set to enter idle mode. 6 SMOD0 5 - 4 POF 3 GF1 2 GF0 1 PD 0 IDL Reset Value = 00X1 0000b Not bit addressable 49 4188E–8051–08/06 7.1 Reduced EMI Mode The ALE signal is used to demultiplex address and data buses on port 0 when used with external program or data memory. Nevertheless, during internal code execution, ALE signal is still generated. In order to reduce EMI, ALE signal can be disabled by setting AO bit. The AO bit is located in AUXR register at bit location 0. As soon as AO is set, ALE is no longer output but remains active during MOVX and MOVC instructions and external fetches. During ALE disabling, ALE pin is weakly pulled high. Table 7-2. 7 Bit Number 7 AUXR Register AUXR - Auxiliary Register (8Eh) 6 Bit Mnemonic 5 4 3 2 1 EXTRAM 0 AO Description Reserved The value read from this bit is indeterminate. Do not set this bit. Reserved The value read from this bit is indeterminate. Do not set this bit. Reserved The value read from this bit is indeterminate. Do not set this bit. Reserved The value read from this bit is indeterminate. Do not set this bit. Reserved The value read from this bit is indeterminate. Do not set this bit. Reserved The value read from this bit is indeterminate. Do not set this bit. EXTRAM bit See Table 6-1. ALE Output bit Clear to restore ALE operation during internal fetches. Set to disable ALE operation during internal fetches. 6 - 5 - 4 - 3 - 2 - 1 EXTRAM 0 AO Reset Value = XXXX XX00b Not bit addressable 50 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 8. TS83C51RB2/RC2/RD2 ROM 8.1 ROM Structure The TS83C51RB2/RC2/RD2 ROM memory is divided in three different arrays: • the code array:16/32/64 Kbytes. • the encryption array:64 bytes. • the signature array:4 bytes. 8.2 ROM Lock System The program Lock system, when programmed, protects the on-chip program against software piracy. 8.2.1 8.2.1 Encryption Array Within the ROM array are 64 bytes of encryption array that are initially unprogrammed (all FF’s). Every time a byte is addressed during program verify, 6 address lines are used to select a byte of the encryption array. This byte is then exclusive-NOR’ed (XNOR) with the code byte, creating an encrypted verify byte. The algorithm, with the encryption array in the unprogrammed state, will return the code in its original, unmodified form. When using the encryption array, one important factor needs to be considered. If a byte has the value FFh, verifying the byte will produce the encryption byte value. If a large block (>64 bytes) of code is left unprogrammed, a verification routine will display the content of the encryption array. For this reason all the unused code bytes should be programmed with random values. This will ensure program protection. 8.2.2 Program Lock Bits The lock bits when programmed according to Table 8-1. will provide different level of protection for the on-chip code and data. Table 8-1. Program Lock bits Program Lock Bits Security level LB1 LB2 LB3 Protection Description No program lock features enabled. Code verify will still be encrypted by the encryption array if programmed. MOVC instruction executed from external program memory returns non encrypted data. MOVC instruction executed from external program memory are disabled from fetching code bytes from internal memory, EA is sampled and latched on reset. Same as level 1+ Verify disable. This security level is only available for 51RDX2 devices. 1 U U U 2 P U U 3 U P U U: unprogrammed P: programmed 8.2.3 Signature bytes The TS83C51RB2/RC2/RD2 contains 4 factory programmed signatures bytes. To read these bytes, perform the process described in section 8.3. 51 4188E–8051–08/06 8.2.4 Verify Algorithm Refer to Section “Verify algorithm”. 52 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 9. TS87C51RB2/RC2/RD2 EPROM 9.1 EPROM Structure The TS87C51RB2/RC2/RD2 EPROM is divided in two different arrays: • the code array:16/32/64 Kbytes. • the encryption array:64 bytes. In addition a third non programmable array is implemented: • the signature array: 4 bytes. 9.2 EPROM Lock System The program Lock system, when programmed, protects the on-chip program against software piracy. 9.2.1 Encryption Array Within the EPROM array are 64 bytes of encryption array that are initially unprogrammed (all FF’s). Every time a byte is addressed during program verify, 6 address lines are used to select a byte of the encryption array. This byte is then exclusive-NOR’ed (XNOR) with the code byte, creating an encrypted verify byte. The algorithm, with the encryption array in the unprogrammed state, will return the code in its original, unmodified form. When using the encryption array, one important factor needs to be considered. If a byte has the value FFh, verifying the byte will produce the encryption byte value. If a large block (>64 bytes) of code is left unprogrammed, a verification routine will display the content of the encryption array. For this reason all the unused code bytes should be programmed with random values. This will ensure program protection. 9.2.2 Program Lock Bits The three lock bits, when programmed according to Table 9-1.9.2.3, will provide different level of protection for the on-chip code and data. Table 9-1. Program Lock bits Program Lock Bits Security level LB1 LB2 LB3 Protection Description No program lock features enabled. Code verify will still be encrypted by the encryption array if programmed. MOVC instruction executed from external program memory returns non encrypted data. MOVC instruction executed from external program memory are disabled from fetching code bytes from internal memory, EA is sampled and latched on reset, and further programming of the EPROM is disabled. Same as 2, also verify is disabled. Same as 3, also external execution is disabled. 1 U U U 2 P U U 3 4 U U P U U P U: unprogrammed, P: programmed 53 4188E–8051–08/06 W ARNING: Security level 2 and 3 should only be programmed after EPROM and Core verification. 9.2.3 Signature bytes The TS87C51RB2/RC2/RD2 contains 4 factory programmed signatures bytes. To read these bytes, perform the process described in Section “Signature bytes”. 9.3 9.3.1 EPROM Programming Set-up Modes I n o r d e r t o p r o g r a m a n d v e r if y t h e E P R O M o r t o r e a d t h e s ig n a t u r e b y t e s , t h e TS87C51RB2/RC2/RD2 is placed in specific set-up modes (See Figure 9-1.). Control and program signals must be held at the levels indicated in Table 9-2. 9.3.2 Definition of Terms Address Lines:P1.0-P1.7, P2.0-P2.5, P3.4, P3.5 respectively for A0-A15 (P2.5 (A13) for RB, P3.4 (A14) for RC, P3.5 (A15) for RD) Data Lines:P0.0-P0.7 for D0-D7 Control Signals:RST, PSEN, P2.6, P2.7, P3.3, P3.6, P3.7. Program Signals:ALE/PROG, EA/VPP. Table 9-2. EPROM Set-Up Modes Mode RST 1 PSEN 0 ALE/P ROG EA/VP P 12.75V P2.6 0 P2.7 1 P3.3 1 P3.6 1 P3.7 1 Program Code data Verify Code data 1 0 1 1 0 0 1 1 Program Encryption Array Address 0-3Fh 1 0 12.75V 0 1 1 0 1 Read Signature Bytes 1 0 1 1 0 0 0 0 Program Lock bit 1 1 0 12.75V 1 1 1 1 1 Program Lock bit 2 1 0 12.75V 1 1 1 0 0 Program Lock bit 3 1 0 12.75V 1 0 1 1 0 54 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 Figure 9-1. Set-Up Modes Configuration +5V 9.3.3 Programming Algorithm The Improved Quick Pulse algorithm is based on the Quick Pulse algorithm and decreases the number of pulses applied during byte programming from 25 to 1. To program the TS87C51RB2/RC2/RD2 the following sequence must be exercised: • Step 1: Activate the combination of control signals. • Step 2: Input the valid address on the address lines. • Step 3: Input the appropriate data on the data lines. • Step 4: Raise EA/VPP from VCC to VPP (typical 12.75V). • Step 5: Pulse ALE/PROG once. • Step 6: Lower EA/VPP from VPP to VCC Repeat step 2 through 6 changing the address and data for the entire array or until the end of the object file is reached (See Figure 9-2). 9.3.4 Verify algorithm Code array verify must be done after each byte or block of bytes is programmed. In either case, a complete verify of th e p rog ra mmed array will ensure reliable programming of the TS87C51RB2/RC2/RD2. P 2.7 is used to enable data output. To verify the TS87C51RB2/RC2/RD2 code the following sequence must be exercised: • Step 1: Activate the combination of program and control signals. • Step 2: Input the valid address on the address lines. • Step 3: Read data on the data lines. Repeat step 2 through 3 changing the address for the entire array verification (See Figure 9-2.) 4188E–8051–08/06 51A-8A 7D-0D 7A-0A DNG 55 SSV 7.0P-0.0P 7.1P-0.1P 5.3P-4.3P 5.2P-0.2P 1LATX 7.3P 6.3P 3.3P 7.2P 6.2P NESP TSR stupni eseht no eulav reporp ro f .13 elbaT eeS * zHM 6 ot 4 *SLANGIS LORTNOC CCV GORP/ELA PPV/AE *SLANGIS MARGORP The encryption array cannot be directly verified. Verification of the encryption array is done by observing that the code array is well encrypted. Figure 9-2. Programming and Verification Signal’s Waveform 9.4 EPROM Erasure (Windowed Packages Only) Erasing the EPROM erases the code array, the encryption array and the lock bits returning the parts to full functionality. Erasure leaves all the EPROM cells in a 1’s state (FF). 9.4.1 Erasure Characteristics The recommended erasure procedure is exposure to ultraviolet light (at 2537 Å) to an integrated dose at least 15 W-sec/cm2. Exposing the EPROM to an ultraviolet lamp of 12,000 μW/cm2 rating for 30 minutes, at a distance of about 25 mm, should be sufficient. An exposure of 1 hour is recommended with most of standard erasers. Erasure of the EPROM begins to occur when the chip is exposed to light with wavelength shorter than approximately 4,000 Å. Since sunlight and fluorescent lighting have wavelengths in this range, exposure to these light sources over an extended time (about 1 week in sunlight, or 3 years in room-level fluorescent lighting) could cause inadvertent erasure. If an application subjects the device to this type of exposure, it is suggested that an opaque label be placed over the window. 10. Signature Bytes The T S83/87C51RB2/RC2/RD2 has four signature bytes in location 30h, 31h, 60h and 61h. To read these bytes follow the procedure for EPROM verify but activate the control lines provided in Table 31. for Read Signature Bytes. Table 10-1. shows the content of the signature byte for the TS87C51RB2/RC2/RD2. Table 10-1. Signature Bytes Content Location 30h 31h 60h Contents 58h 57h 7Ch Comment Manufacturer Code: Atmel Family Code: C51 X2 Product name: TS83C51RD2 56 AT/TS8xC51Rx2 4188E–8051–08/06 s μ elcyC yfireV/daeR tuO ataD elcyC gnimmargorP 001 nI ataD V0 V5 V57.21 7D-0D GORP/ELA PP V/ AE slangis lortnoC 21A-0A AT/TS8xC51Rx2 60h 60h 60h 60h 60h 61h FCh 37h B7h 3Bh BBh FFh Product name: TS87C51RD2 Product name: TS83C51RC2 Product name: TS87C51RC2 Product name: TS83C51RB2 Product name: TS87C51RB2 Product revision number 57 4188E–8051–08/06 11. Electrical Characteristics 11.1 Absolute Maximum Ratings *NOTICE: Ambiant Temperature Under Bias: C = commercial......................................................0°C to 70 °C I = industrial ........................................................-40°C to 85 °C Storage Temperature .................................... -65°C to + 150°C Voltage on VCC to VSS ........................................-0.5 V to + 7 V Voltage on Any Pin to VSS ........................-0.5 V to VCC + 0.5 V Power Dissipation .............................................................. 1 W Stresses at or above those listed under “ Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions may affect device reliability. Power dissipation is based on the maximum allowable die temperature and the thermal resistance of the package. 11.2 Power Consumption Measurement Since the introduction of the first C51 devices, every manufacturer made operating Icc measurements under reset, which made sense for the designs were the CPU was running under reset. In Atmel new devices, the CPU is no more active during reset, so the power consumption is very low but is not really representative of what will happen in the customer system. That’s why, while keeping measurements under Reset, Atmel presents a new way to measure the operating Icc: Using an internal test ROM, the following code is executed: Label: SJMP Label (80 FE) Ports 1, 2, 3 are disconnected, Port 0 is tied to FFh, EA = Vcc, RST = Vss, XTAL2 is not connected and XTAL1 is driven by the clock. This is much more representative of the real operating Icc. 11.3 DC Parameters for Standard Voltage TA = 0°C to +70°C; VSS = 0 V; VCC = 5 V ± 10%; F = 0 to 40 MHz. TA = -40°C to +85°C; VSS = 0 V; VCC = 5 V ± 10%; F = 0 to 40 MHz. Table 11-1. Symbol VIL VIH VIH1 DC Parameters in Standard Voltage Parameter Input Low Voltage Input High Voltage except XTAL1, RST Input High Voltage, XTAL1, RST Min -0.5 0.2 VCC + 0.9 0.7 VCC (6) Typ Max 0.2 VCC - 0.1 VCC + 0.5 VCC + 0.5 0.3 Unit V V V V V V V V V V V V Test Conditions IOL = 100 μA(4) IOL = 1.6 mA(4) IOL = 3.5 mA(4) IOL = 200 μA(4) IOL = 3.2 mA(4) IOL = 7.0 mA(4) IOL = 100 μA(4) IOL = 1.6 mA(4) IOL = 3.5 mA(4) VOL Output Low Voltage, ports 1, 2, 3, 4, 5 0.45 1.0 0.3 VOL1 Output Low Voltage, port 0 (6) 0.45 1.0 0.3 VOL2 Output Low Voltage, ALE, PSEN 0.45 1.0 58 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 Table 11-1. Symbol DC Parameters in Standard Voltage Parameter Min VCC - 0.3 Typ Max Unit V V V Test Conditions IOH = -10 μA IOH = -30 μA IOH = -60 μA V CC = 5 V ± 10% IOH = -200 μA IOH = -3.2 mA IOH = -7.0 mA VCC = 5 V ± 10% IOH = -100 μA IOH = -1.6 mA IOH = -3.5 mA VCC = 5 V ± 10% VOH Output High Voltage, ports 1, 2, 3, 4, 5 VCC - 0.7 VCC - 1.5 VCC - 0.3 VOH1 Output High Voltage, port 0 VCC - 0.7 VCC - 1.5 V V V VCC - 0.3 VOH2 Output High Voltage,ALE, PSEN VCC - 0.7 VCC - 1.5 RRST IIL ILI ITL CIO IPD ICC under RESET RST Pulldown Resistor Logical 0 Input Current ports 1, 2, 3, 4, 5 Input Leakage Current Logical 1 to 0 Transition Current, ports 1, 2, 3, 4, 5 Capacitance of I/O Buffer Power-down Current 20(5) 50 90 (5) V V V 200 -50 ±10 -650 kΩ μA μA μA pF μA Vin = 0.45 V 0.45 V < Vin < VCC Vin = 2.0 V Fc = 1 MHz TA = 25°C 2.0 V < VCC < 5.5 V(3) 10 50 1 + 0.4 Freq (MHz) @12MHz 5.8 @16MHz 7.4 3 + 0.6 Freq (MHz) @12MHz 10.2 @16MHz 12.6 0.25+0.3 Freq (MHz) @12MHz 3.9 @16MHz 5.1 Power Supply Current Maximum values, X1 mode: (7) mA V CC = 5.5 V(1) ICC operating Power Supply Current Maximum values, X1 mode: (7) mA V CC = 5.5 V(8) ICC idle Power Supply Current Maximum values, X1 mode: (7) mA V CC = 5.5 V(2) 59 4188E–8051–08/06 11.4 DC Parameters for Low Voltage TA = 0°C to +70°C; VSS = 0 V; VCC = 2.7 V to 5.5 V ± 10%; F = 0 to 30 MHz. TA = -40°C to +85°C; VSS = 0 V; VCC = 2.7 V to 5.5 V ± 10%; F = 0 to 30 MHz. Table 11-2. Symbol VIL VIH VIH1 VOL VOL1 VOH VOH1 IIL ILI ITL RRST CIO DC Parameters for Low Voltage Parameter Input Low Voltage Input High Voltage except XTAL1, RST Input High Voltage, XTAL1, RST Output Low Voltage, ports 1, 2, 3, 4, 5 (6) Min -0.5 0.2 VCC + 0.9 0.7 VCC Typ Max 0.2 VCC - 0.1 VCC + 0.5 VCC + 0.5 0.45 0.45 Unit V V V V V V V Test Conditions IOL = 0.8 mA(4) IOL = 1.6 mA(4) IOH = -10 μA IOH = -40 μA Vin = 0.45 V 0.45 V < Vin < VCC Vin = 2.0 V Output Low Voltage, port 0, ALE, PSEN (6) Output High Voltage, ports 1, 2, 3, 4, 5 Output High Voltage, port 0, ALE, PSEN Logical 0 Input Current ports 1, 2, 3, 4, 5 Input Leakage Current Logical 1 to 0 Transition Current, ports 1, 2, 3, 4, 5 RST Pulldown Resistor Capacitance of I/O Buffer 50 90 (5) 0.9 VCC 0.9 VCC -50 ±10 -650 200 10 μA μA μA kΩ pF Fc = 1 MHz TA = 25°C IPD Power-down Current 20 (5) 10 (5) 50 30 μA VCC = 2.0 V to 5.5 V(3) VCC = 2.0 V to 3.3 V(3) IPD ICC under RESET Power-down Current (Only for TS87C51RD2 S287-xxx Very Low power) 2 (5) 15 1 + 0.2 Freq (MHz) @12MHz 3.4 @16MHz 4.2 1 + 0.3 Freq (MHz) @12MHz 4.6 @16MHz 5.8 0.15 Freq (MHz) + 0.2 @12MHz 2 @16MHz 2.6 μA 2.0 V < VCC < 3.6 V(3) Power Supply Current Maximum values, X1 mode: (7) mA VCC = 3.3 V(1) ICC operating Power Supply Current Maximum values, X1 mode: (7) mA VCC = 3.3 V(8) ICC idle Power Supply Current Maximum values, X1 mode: (7) mA VCC = 3.3 V(2) Notes: 1. ICC under reset is measured with all output pins disconnected; XTAL1 driven with TCLCH , TCHCL = 5 ns (see Figure 11-5.), V IL = VSS + 0.5 V, VIH = V CC - 0.5V; XTAL2 N.C.; EA = RST = Port 0 = VCC. ICC would be slightly higher if a crystal oscillator used.. 2. Idle ICC is measured with all output pins disconnected; XTAL1 driven with TCLCH , TCHCL = 5 ns, VIL = V SS + 0.5 V, VIH = VCC 0.5 V; XTAL2 N.C; Port 0 = VCC; EA = RST = VSS (see Figure 11-3.). 3. Power-down ICC is measured with all output pins disconnected; EA = V SS, PORT 0 = VCC ; XTAL2 NC.; RST = VSS (see Figure 11-4.). 60 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 4. Capacitance loading on Ports 0 and 2 may cause spurious noise pulses to be superimposed on the VOLs of ALE and Ports 1 and 3. The noise is due to external bus capacitance discharging into the Port 0 and Port 2 pins when these pins make 1 to 0 transitions during bus operation. In the worst cases (capacitive loading 100pF), the noise pulse on the ALE line may exceed 0.45V with maxi VOL peak 0.6V. A Schmitt Trigger use is not necessary. 5. Typicals are based on a limited number of samples and are not guaranteed. The values listed are at room temperature and 5V. 6. Under steady state (non-transient) conditions, IOL must be externally limited as follows: M aximum IOL per port pin: 10 mA M aximum IOL per 8-bit port: Port 0: 26 mA Ports 1, 2, 3 and 4 and 5 when available: 15 mA M aximum total IOL for all output pins: 71 mA If IOL exceeds the test condition, VOL may exceed the related specification. Pins are not guaranteed to sink current greater than the listed test conditions. 7. For other values, please contact your sales office. 8. Operating ICC is measured with all output pins disconnected; XTAL1 driven with T CLCH, TCHCL = 5 ns (see Figure 11-5.), V IL = VSS + 0.5 V, VIH = V CC - 0.5V; XTAL2 N.C.; EA = Port 0 = V CC; RST = V SS. The internal ROM runs the code 80 FE (label: SJMP label). ICC w ould be slightly higher if a crystal oscillator is used. Measurements are made with OTP products when possible, which is the worst case. Figure 11-1. ICC Test Condition, under reset VCC ICC VCC VCC RST (NC) CLOCK SIGNAL XTAL2 XTAL1 VSS All other pins are disconnected. P0 EA VCC Figure 11-2. Operating ICC Test Condition VCC ICC VCC P0 RST (NC) CLOCK SIGNAL XTAL2 XTAL1 VSS All other pins are disconnected. EA e slu p h gi h a r et fa s s V = t e s eR VCC 4188E–8051–08/06 s el c y c kc ol c 42 t sa el ta gn iru d 61 Figure 11-3. ICC Test Condition, Idle Mode VCC ICC VCC P0 RST (NC) CLOCK SIGNAL XTAL2 XTAL1 VSS All other pins are disconnected. EA e slup h gi h a re t fa s s V = t e s eR VCC Figure 11-4. ICC Test Condition, Power-Down Mode VCC ICC VCC P0 s el c y c kc ol c 42 t sa el ta gni ru d es lu p h gi h a r et fa s s V = t e s eR Figure 11-5. Clock Signal Waveform for ICC Tests in Active and Idle Modes 11.5 11.5.1 AC Parameters Explanation of the AC Symbols Each timing symbol has 5 characters. The first character is always a “T” (stands for time). The other characters, depending on their positions, stand for the name of a signal or the logical status of that signal. The following is a list of all the characters and what they stand for. Example:TAVLL = Time for Address Valid to ALE Low. TLLPL = Time for ALE Low to PSEN Low. TA = 0 to +70°C (commercial temperature range); VSS = 0 V; VCC = 5 V ± 10%; -M and -V ranges. TA = -40°C to +85°C (industrial temperature range); VSS = 0 V; VCC = 5 V ± 10%; -M and -V ranges. 62 AT/TS8xC51Rx2 4188E–8051–08/06 se l cy c k co lc 42 t sa e l ta g nirud VCC RST XTAL2 XTAL1 VSS EA (NC) All other pins are disconnected. VCC-0.5V 0.45V TCLCH TCHCL TCLCH = TCHCL = 5ns. 0.7VCC 0.2VCC-0.1 AT/TS8xC51Rx2 TA = 0 to +70°C (commercial temperature range); VSS = 0 V; 2.7 V < VCC < 5.5 V; -L range. TA = -40°C to +85°C (industrial temperature range); V SS = 0 V; 2.7 V < VCC < 5.5 V; -L range. Table 11-3. gives the maximum applicable load capacitance for Port 0, Port 1, 2 and 3, and ALE and PSEN s ignals. Timings will be guaranteed if these capacitances are respected. Higher capacitance values can be used, but timings will then be degraded. Table 11-3. Load Capacitance versus speed range, in pF -M Port 0 Port 1, 2, 3 ALE / PSEN 100 80 100 -V 50 50 30 -L 100 80 100 Table 11-5., Table 39. and Table 42. give the description of each AC symbols. Table 11-6., Table 11-8. and Table 11-10. give for each range the AC parameter. Table 11-7., Table 11-9. and Table 11-11. give the frequency derating formula of the AC parameter. To calculate each AC symbols, take the x value corresponding to the speed grade you need (-M, -V or -L) and replace this value in the formula. Values of the frequency must be limited to the corresponding speed grade: Table 11-4. Max frequency for derating formula regarding the speed grade -M X1 mode Freq (MHz) T (ns) 40 25 -M X2 mode 20 50 -V X1 mode 40 25 -V X2 mode 30 33.3 -L X1 mode 30 33.3 -L X2 mode 20 50 Example: TLLIV in X2 mode for a -V part at 20 MHz (T = 1/20E6 = 50 ns): x= 22 (Table 11-7.) T= 50ns TLLIV= 2T - x = 2 x 50 - 22 = 78ns 63 4188E–8051–08/06 11.5.2 External Program Memory Characteristics Table 11-5. Symbol Description Symbol T TLHLL TAVLL TLLAX TLLIV TLLPL TPLPH TPLIV TPXIX TPXIZ TPXAV TAVIV TPLAZ Parameter Oscillator clock period ALE pulse width Address Valid to ALE Address Hold After ALE ALE to Valid Instruction In ALE to PSEN PSEN Pulse Width PSEN to Valid Instruction In Input Instruction Hold After PSEN Input Instruction FloatAfter PSEN PSEN to Address Valid Address to Valid Instruction In PSEN Low to Address Float Table 11-6. AC Parameters for Fix Clock -V -V X2 mode -M 30 MHz 60 MHz equiv. Min 33 25 4 4 70 15 55 35 0 18 85 10 0 12 53 10 9 35 25 0 20 95 10 45 17 60 50 0 10 80 10 Max Min 25 42 12 12 78 10 50 30 0 18 122 10 Max standard mode 40 MHz -L X2 mode 20 MHz 40 MHz equiv. Min 50 35 5 5 65 18 75 55 Max Min 33 52 13 13 98 Max ns ns ns ns ns ns ns ns ns ns ns ns -L standard mode 30 MHz Units Speed Symbol T TLHLL TAVLL TLLAX TLLIV TLLPL TPLPH TPLIV TPXIX TPXIZ TAVIV TPLAZ 40 MHz Min 25 40 10 10 Max 64 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 Table 11-7. Symbol TLHLL TAVLL TLLAX TLLIV TLLPL TPLPH TPLIV TPXIX TPXIZ TAVIV TPLAZ AC Parameters for a Variable Clock: derating formula Type Min Min Min Max Min Min Max Min Max Max Max Standard Clock 2T-x T-x T-x 4T-x T-x 3T-x 3T-x x T-x 5T-x x X2 Clock T-x 0.5 T - x 0.5 T - x 2T-x 0.5 T - x 1.5 T - x 1.5 T - x x 0.5 T - x 2.5 T - x x -M 10 15 15 30 10 20 40 0 7 40 10 -V 8 13 13 22 8 15 25 0 5 30 10 -L 15 20 20 35 15 25 45 0 15 45 10 Units ns ns ns ns ns ns ns ns ns ns ns 11.5.3 External Program Memory Read Cycle Figure 11-6. External Program Memory Read Cycle 12 TCLCL TLHLL ALE TLLIV TLLPL TPLPH PSEN TLLAX TAVLL PORT 0 INSTR IN A0-A7 TAVIV PORT 2 ADDRESS OR SFR-P2 ADDRESS A8-A15 ADDRESS A8-A15 TPLIV TPLAZ TPXIX INSTR IN A0-A7 INSTR IN TPXAV TPXIZ 65 4188E–8051–08/06 11.5.4 External Data Memory Characteristics Symbol TRLRH TWLWH TRLDV TRHDX TRHDZ TLLDV TAVDV TLLWL TAVWL TQVWX TQVWH TWHQX TRLAZ TWHLH Parameter RD Pulse Width WR Pulse Width RD to Valid Data In Data Hold After RD Data Float After RD ALE to Valid Data In Address to Valid Data In ALE to WR or RD Address to WR or RD Data Valid to WR Transition Data set-up to WR High Data Hold After WR RD Low to Address Float RD or WR High to ALE high Table 11-8. AC Parameters for a Fix Clock -V X2 mode -V standard mode 40 MHz -L X2 mode 20 MHz 40 MHz equiv. Min 135 135 60 0 0 18 98 100 30 47 7 107 9 70 55 80 15 165 17 0 7 27 15 0 35 5 35 165 175 95 45 70 5 155 10 0 45 13 102 0 25 155 160 105 70 103 13 213 18 0 53 Max Min 125 125 95 0 42 222 235 130 Max Min 175 175 137 Max ns ns ns ns ns ns ns ns ns ns ns ns ns ns -L standard mode 30 MHz Units Speed -M 40 MHz 30 MHz 60 MHz equiv. Min 85 85 100 Max Symbol TRLRH TWLWH TRLDV TRHDX TRHDZ TLLDV TAVDV TLLWL TAVWL TQVWX TQVWH TWHQX TRLAZ TWHLH Min 130 130 Max 0 30 160 165 50 75 10 160 15 0 10 40 100 66 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 Table 11-9. Symbol TRLRH TWLWH TRLDV TRHDX TRHDZ TLLDV TAVDV TLLWL TLLWL TAVWL TQVWX TQVWH TWHQX TRLAZ TWHLH TWHLH AC Parameters for a Variable Clock: derating formula Type Min Min Max Min Max Max Max Min Max Min Min Min Min Max Min Max Standard Clock 6T-x 6T-x 5T-x x 2T-x 8T-x 9T-x 3T-x 3T+x 4T-x T-x 7T-x T-x x T-x T+x X2 Clock 3T-x 3T-x 2.5 T - x x T-x 4T -x 4.5 T - x 1.5 T - x 1.5 T + x 2T-x 0.5 T - x 3.5 T - x 0.5 T - x x 0.5 T - x 0.5 T + x -M 20 20 25 0 20 40 60 25 25 25 15 15 10 0 15 15 -V 15 15 23 0 15 35 50 20 20 20 10 10 8 0 10 10 -L 25 25 30 0 25 45 65 30 30 30 20 20 15 0 20 20 Units ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns 11.5.5 External Data Memory Write Cycle Figure 11-7. External Data Memory Write Cycle ALE TWHLH PSEN TLLWL TWLWH WR TLLAX PORT 0 A0-A7 TAVWL PORT 2 ADDRESS OR SFR-P2 ADDRESS A8-A15 OR SFR P2 TQVWX TQVWH DATA OUT TWHQX 11.5.6 External Data Memory Read Cycle 67 4188E–8051–08/06 Figure 11-8. External Data Memory Read Cycle ALE TLLDV TWHLH PSEN TLLWL V D L RT TRLRH RD TLLAX PORT 0 A0-A7 TAVWL PORT 2 ADDRESS OR SFR-P2 TAVDV TRHDZ TRHDX DATA IN TRLAZ ADDRESS A8-A15 OR SFR P2 11.5.7 Serial Port Timing - Shift Register Mode Symbol TXLXL TQVHX TXHQX TXHDX TXHDV Parameter Serial port clock cycle time Output data set-up to clock rising edge Output data hold after clock rising edge Input data hold after clock rising edge Clock rising edge to input data valid Table 11-10. AC Parameters for a Fix Clock -V X2 mode -M Speed Symbol TXLXL TQVHX TXHQX TXHDX TXHDV 40 MHz Min 300 200 30 0 117 Max 30 MHz 60 MHz equiv. Min 200 117 13 0 34 Max Min 300 200 30 0 117 Max -V standard mode 40 MHz -L X2 mode 20 MHz 40 MHz equiv. Min 300 200 30 0 117 Max Min 400 283 47 0 200 Max ns ns ns ns ns -L standard mode 30 MHz Units 68 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 Table 11-11. AC Parameters for a Variable Clock: derating formula Symbol TXLXL TQVHX TXHQX TXHDX TXHDV Type Min Min Min Min Max Standard Clock 12 T 10 T - x 2T-x x 10 T - x X2 Clock 6T 5T-x T-x x 5 T- x 50 20 0 133 50 20 0 133 50 20 0 133 -M -V -L Units ns ns ns ns ns 11.5.8 Shift Register Timing Waveforms Figure 11-9. Shift Register Timing Waveforms INSTRUCTION ALE TXLXL CLOCK TQVXH OUTPUT DATA WRITE to SBUF INPUT DATA CLEAR RI 0 TXHDV TXHQX 1 2 TXHDX 3 4 5 6 7 SET TI 0 1 2 3 4 5 6 7 8 SET RI 4188E–8051–08/06 DILAV 69 DILAV DILAV DILAV DILAV DILAV DILAV DILAV 11.5.9 EPROM Programming and Verification Characteristics TA = 21°C to 27°C; VSS = 0V; VCC = 5V ± 10% while programming. VCC = operating range while Symbol VPP IPP 1/TCLCL TAVGL TGHAX TDVGL TGHDX TEHSH TSHGL TGHSL TGLGH TAVQV TELQV TEHQZ Parameter Programming Supply Voltage Programming Supply Current Oscillator Frquency Address Setup to PROG Low Adress Hold after PROG Data Setup to PROG Low 4 48 TCLCL 48 TCLCL 48 TCLCL 48 TCLCL 48 TCLCL 10 10 90 110 48 TCLCL 48 TCLCL 0 48 TCLCL μs μs μs Min 12.5 Max 13 75 6 Units V mA MHz Data Hold after PROG (Enable) High to VPP VPP Setup to PROG Low VPP Hold after PROG PROG Width Address to Valid Data ENABLE Low to Data Valid Data Float after ENABLE verifying 11.5.10 EPROM Programming and Verification Waveforms Figure 11-10. EPROM Programming and Verification Waveforms PROGRAMMING P1.0-P1.7 P2.0-P2.5 P 3.4-P3.5* P0 TDVGL TAVGL ALE/PROG TSHGL TGLGH EA/VPP CONTROL SIGNALS (ENABLE) VCC TEHSH VPP TGHSL VCC TELQV ADDRESS VERIFICATION ADDRESS TAVQV DATA IN TGHDX TGHAX DATA OUT TEHQZ 70 5.3P ot pu :BK46 ,4.3P ot pu :BK23 ,5.2P ot pu :BK61 ,4.2P ot pu :BK8 * AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 11.5.11 External Clock Drive Characteristics (XTAL1) Parameter Oscillator Period High Time Low Time Rise Time Fall Time Cyclic ratio in X2 mode 40 Min 25 5 5 5 5 60 Max Units ns ns ns ns ns % Symbol TCLCL TCHCX TCLCX TCLCH TCHCL TCHCX/TCLCX 11.5.12 External Clock Drive Waveforms Figure 11-11. External Clock Drive Waveforms 11.5.13 AC Testing Input/Output Waveforms Figure 11-12. AC Testing Input/Output Waveforms AC inputs during testing are driven at VCC - 0.5 for a logic “1” and 0.45V for a logic “0”. Timing measurement are made at VIH min for a logic “1” and VIL max for a logic “0”. 11.5.14 Float Waveforms Figure 11-13. Float Waveforms For timing purposes a port pin is no longer floating when a 100 mV change from load voltage occurs and begins to float when a 100 mV change from the loaded VOH/VOL level occurs. IOL/IOH ≥ ± 20mA. 4188E–8051–08/06 H CL C T X C HCT V 1.0- D A O L V V 1.0+DAOLV LC LC T 1.0- C C V 2 .0 9 .0+CC V2.0 XC LCT D A O LV TAO LF V 1. 0 + L O V V 1.0-H OV V 1.0- C C V 2 . 0 CCV7.0 LC H C T V 54.0 V 5.0-CCV V 5.0- C C V TUP TUO /TUPN I V 54.0 71 11.5.15 Clock Waveforms Valid in normal clock mode. In X2 mode XTAL2 signal must be changed to XTAL2 divided by two. Figure 11-14. Clock Waveforms STATE4 P1P2 STATE5 P1P2 STATE6 P1P2 STATE1 P1P2 STATE2 P1P2 STATE3 P1P2 STATE4 P1P2 STATE5 P1P2 P2 (EXT) MOV DEST PORT (P1, P2, P3) (INCLUDES INT0, INT1, TO, T1) 72 AT/TS8xC51Rx2 4188E–8051–08/06 HCTEF YROMEM MARGORP LANRETXE KCOLC TFIHS TROP LAIRES NOITAREPO TROP ELCYC ETIRW ELCYC DAER MOV DEST P0 P1, P2, P3 PINS SAMPLED P1, P2, P3 PINS SAMPLED LANRETNI CLOCK XTAL2 ALE PSEN P0 RD P0 P2 WR P0 P2 THESE SIGNALS ARE NOT ACTIVATED DURING THE EXECUTION OF A MOVX INSTRUCTION DATA SAMPLED FLOAT PCL OUT DATA SAMPLED FLOAT PCL OUT DATA SAMPLED FLOAT PCL OUT INDICATES ADDRESS TRANSITIONS PCL OUT (IF PROGRAM MEMORY IS EXTERNAL) DPL OR Rt OUT FLOAT INDICATES DPH OR P2 SFR TO PCH TRANSITION PCL OUT (EVEN IF PROGRAM MEMORY IS INTERNAL) DPL OR Rt OUT DATA OUT INDICATES DPH OR P2 SFR TO PCH TRANSITION PCL OUT (IF PROGRAM MEMORY IS EXTERNAL) OLD DATA P0 PINS SAMPLED NEW DATA P0 PINS SAMPLED RXD SAMPLED RXD SAMPLED TXD (MODE 0) This diagram indicates when signals are clocked internally. The time it takes the signals to propagate to the pins, however, ranges from 25 to 125 ns. This propagation delay is dependent on variables such as temperature and pin loading. Propagation also varies from output to output and component. Typically though (TA=25 °C fully loaded) RD a nd WR propagation delays are approximately 50ns. The other signals are typically 85 ns. Propagation delays are incorporated in the AC specifications. AT/TS8xC51Rx2 13. Ordering Information Part Number TS80C51RA2-MCA TS80C51RA2-MCB TS80C51RA2-MCE TS80C51RA2-MIA TS80C51RA2-MIB TS80C51RA2-MIE TS80C51RA2-LCA TS80C51RA2-LCB TS80C51RA2-LCE TS80C51RA2-LIA TS80C51RA2-LIB TS80C51RA2-LIE TS80C51RA2-VCA TS80C51RA2-VCB TS80C51RA2-VCE TS80C51RA2-VIA TS80C51RA2-VIB TS80C51RA2-VIE Memory size Romless Romless Romless Romless Romless Romless Romless Romless Romless Romless Romless Romless Romless Romless Romless Romless Romless Romless Supply Voltage 5V 5V 5V 5V 5V 5V 3-5V 3-5V 3-5V 3-5V 3-5V 3-5V 5V 5V 5V 5V 5V 5V Temperature Range Commercial Commercial Commercial Industrial Industrial Industrial Commercial Commercial Commercial Industrial Industrial Industrial Commercial Commercial Commercial Industrial Industrial Industrial Max Frequency 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) Package PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 Packing Stick Stick Tray Stick Stick Tray Stick Stick Tray Stick Stick Tray Stick Stick Tray Stick Stick Tray AT80C51RA2-3CSUM AT80C51RA2-SLSUM AT80C51RA2-RLTUM AT80C51RA2-3CSIM AT80C51RA2-SLSIM AT80C51RA2-RLTIM AT80C51RA2-3CSCL AT80C51RA2-SLSCL AT80C51RA2-RLTCL AT80C51RA2-3CSUL AT80C51RA2-SLSUL AT80C51RA2-RLTUL AT80C51RA2-3CSCV AT80C51RA2-SLSCV Romless Romless Romless Romless Romless Romless Romless Romless Romless Romless Romless Romless Romless Romless 5V 5V 5V 5V 5V 5V 3-5V 3-5V 3-5V 3-5V 3-5V 3-5V 5V 5V Industrial & Green Industrial & Green Industrial & Green Industrial Industrial Industrial Commercial Commercial Commercial Industrial & Green Industrial & Green Industrial & Green Commercial Commercial 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 Stick Stick Tray Stick Stick Tray Stick Stick Tray Stick Stick Tray Stick Stick 73 4188E–8051–08/06 Part Number AT80C51RA2-RLTCV AT80C51RA2-3CSIV AT80C51RA2-SLSIV AT80C51RA2-RLSIV Memory size Romless Romless Romless Romless Supply Voltage 5V 5V 5V 5V Temperature Range Commercial Industrial Industrial Industrial Max Frequency 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) Package VQFP44 PDIL40 PLCC44 VQFP44 Packing Tray Stick Stick Tray TS80C51RD2-MCA TS80C51RD2-MCB TS80C51RD2-MCE TS80C51RD2-MIA TS80C51RD2-MIB TS80C51RD2-MIE TS80C51RD2-LCA TS80C51RD2-LCB TS80C51RD2-LCE TS80C51RD2-LIA TS80C51RD2-LIB TS80C51RD2-LIE TS80C51RD2-VCA TS80C51RD2-VCB TS80C51RD2-VCE TS80C51RD2-VIA TS80C51RD2-VIB TS80C51RD2-VIE Romless Romless Romless Romless Romless Romless Romless Romless Romless Romless Romless Romless Romless Romless Romless Romless Romless Romless 5V 5V 5V 5V 5V 5V 3-5V 3-5V 3-5V 3-5V 3-5V 3-5V 5V 5V 5V 5V 5V 5V Commercial Commercial Commercial Industrial Industrial Industrial Commercial Commercial Commercial Industrial Industrial Industrial Commercial Commercial Commercial Industrial Industrial Industrial 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 Stick Stick Tray Stick Stick Tray Stick Stick Tray Stick Stick Tray Stick Stick Tray Stick Stick Tray AT80C51RD2-3CSUM AT80C51RD2-SLSUM AT80C51RD2-RLTUM AT80C51RD2-3CSUL AT80C51RD2-SLSUL AT80C51RD2-RLTUL Romless Romless Romless Romless Romless Romless 5V 5V 5V 3-5V 3-5V 3-5V Industrial & Green Industrial & Green Industrial & Green Industrial & Green Industrial & Green Industrial & Green 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 Stick Stick Tray Stick Stick Tray TS87C51RB2-MCA TS87C51RB2-MCB TS87C51RB2-MCE TS87C51RB2-MIA OTP 16k Bytes OTP 16k Bytes OTP 16k Bytes OTP 16k Bytes 5V 5V 5V 5V Commercial Commercial Commercial Industrial 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) PDIL40 PLCC44 VQFP44 PDIL40 Stick Stick Tray Stick 74 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 Part Number TS87C51RB2-MIB TS87C51RB2-MIE TS87C51RB2-LCA TS87C51RB2-LCB TS87C51RB2-LCE TS87C51RB2-LIA TS87C51RB2-LIB TS87C51RB2-LIE TS87C51RB2-VCA TS87C51RB2-VCB TS87C51RB2-VCE TS87C51RB2-VIA TS87C51RB2-VIB TS87C51RB2-VIE Memory size OTP 16k Bytes OTP 16k Bytes OTP 16k Bytes OTP 16k Bytes OTP 16k Bytes OTP 16k Bytes OTP 16k Bytes OTP 16k Bytes OTP 16k Bytes OTP 16k Bytes OTP 16k Bytes OTP 16k Bytes OTP 16k Bytes OTP 16k Bytes Supply Voltage 5V 5V 3-5V 3-5V 3-5V 3-5V 3-5V 3-5V 5V 5V 5V 5V 5V 5V Temperature Range Industrial Industrial Commercial Commercial Commercial Industrial Industrial Industrial Commercial Commercial Commercial Industrial Industrial Industrial Max Frequency 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) Package PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 Packing Stick Tray Stick Stick Tray Stick Stick Tray Stick Stick Tray Stick Stick Tray AT87C51RB2-3CSUM AT87C51RB2-SLSUM AT87C51RB2-RLTUM AT87C51RB2-3CSUL AT87C51RB2-SLSUL AT87C51RB2-RLTUL OTP 16k Bytes OTP 16k Bytes OTP 16k Bytes OTP 16k Bytes OTP 16k Bytes OTP 16k Bytes 5V 5V 5V 3-5V 3-5V 3-5V Industrial & Green Industrial & Green Industrial & Green Industrial & Green Industrial & Green Industrial & Green 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 Stick Stick Tray Stick Stick Tray TS87C51RC2-MCA TS87C51RC2-MCB TS87C51RC2-MCE TS87C51RC2-MIA TS87C51RC2-MIB TS87C51RC2-MIE TS87C51RC2-LCA TS87C51RC2-LCB TS87C51RC2-LCE TS87C51RC2-LIA TS87C51RC2-LIB TS87C51RC2-LIE TS87C51RC2-VCA OTP 32k Bytes OTP 32k Bytes OTP 32k Bytes OTP 32k Bytes OTP 32k Bytes OTP 32k Bytes OTP 32k Bytes OTP 32k Bytes OTP 32k Bytes OTP 32k Bytes OTP 32k Bytes OTP 32k Bytes OTP 32k Bytes 5V 5V 5V 5V 5V 5V 3-5V 3-5V 3-5V 3-5V 3-5V 3-5V 5V Commercial Commercial Commercial Industrial Industrial Industrial Commercial Commercial Commercial Industrial Industrial Industrial Commercial 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 40 MHz (30 MHz X2) PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 Stick Stick Tray Stick Stick Tray Stick Stick Tray Stick Stick Tray Stick 75 4188E–8051–08/06 Part Number TS87C51RC2-VCB TS87C51RC2-VCE TS87C51RC2-VIA TS87C51RC2-VIB TS87C51RC2-VIE Memory size OTP 32k Bytes OTP 32k Bytes OTP 32k Bytes OTP 32k Bytes OTP 32k Bytes Supply Voltage 5V 5V 5V 5V 5V Temperature Range Commercial Commercial Industrial Industrial Industrial Max Frequency 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) Package PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 Packing Stick Tray Stick Stick Tray AT87C51RC2-3CSUM AT87C51RC2-SLSUM AT87C51RC2-RLTUM AT87C51RC2-3CSUL AT87C51RC2-SLSUL AT87C51RC2-RLTUL OTP 32k Bytes OTP 32k Bytes OTP 32k Bytes OTP 32k Bytes OTP 32k Bytes OTP 32k Bytes 5V 5V 5V 3-5V 3-5V 3-5V Industrial & Green Industrial & Green Industrial & Green Industrial & Green Industrial & Green Industrial & Green 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 Stick Stick Tray Stick Stick Tray TS87C51RD2-MCA TS87C51RD2-MCB TS87C51RD2-MCE TS87C51RD2-MIA TS87C51RD2-MIB TS87C51RD2-MIE TS87C51RD2-LCA TS87C51RD2-LCB TS87C51RD2-LCE TS87C51RD2-LIA TS87C51RD2-LIB TS87C51RD2-LIE TS87C51RD2-VCA TS87C51RD2-VCB TS87C51RD2-VCE TS87C51RD2-VCL TS87C51RD2-VIA TS87C51RD2-VIB TS87C51RD2-VIE OTP 64k Bytes OTP 64k Bytes OTP 64k Bytes OTP 64k Bytes OTP 64k Bytes OTP 64k Bytes OTP 64k Bytes OTP 64k Bytes OTP 64k Bytes OTP 64k Bytes OTP 64k Bytes OTP 64k Bytes OTP 64k Bytes OTP 64k Bytes OTP 64k Bytes OTP 64k Bytes OTP 64k Bytes OTP 64k Bytes OTP 64k Bytes 5V 5V 5V 5V 5V 5V 3-5V 3-5V 3-5V 3-5V 3-5V 3-5V 5V 5V 5V 5V 5V 5V 5V Commercial Commercial Commercial Industrial Industrial Industrial Commercial Commercial Commercial Industrial Industrial Industrial Commercial Commercial Commercial Commercial Industrial Industrial Industrial 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PLCC68 PDIL40 PLCC44 VQFP44 Stick Stick Tray Stick Stick Tray Stick Stick Tray Stick Stick Tray Stick Stick Tray Stick Stick Stick Tray AT87C51RD2-3CSUM AT87C51RD2-SLSUM OTP 64k Bytes OTP 64k Bytes 5V 5V Industrial & Green Industrial & Green 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) PDIL40 PLCC44 Stick Stick 76 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 Part Number AT87C51RD2-RLTUM AT87C51RD2-3CSUL AT87C51RD2-SLSUL AT87C51RD2-RLTUL Memory size OTP 64k Bytes OTP 64k Bytes OTP 64k Bytes OTP 64k Bytes Supply Voltage 5V 3-5V 3-5V 3-5V Temperature Range Industrial & Green Industrial & Green Industrial & Green Industrial & Green Max Frequency 40 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) Package VQFP44 PDIL40 PLCC44 VQFP44 Packing Tray Stick Stick Tray TS83C51RB2-MCA TS83C51RB2-MCB TS83C51RB2-MCE TS83C51RB2-MIA TS83C51RB2-MIB TS83C51RB2-MIE TS83C51RB2-LCA TS83C51RB2-LCB TS83C51RB2-LCE TS83C51RB2-LIA TS83C51RB2-LIB TS83C51RB2-LIE TS83C51RB2-VCA TS83C51RB2-VCB TS83C51RB2-VCE TS83C51RB2-VIA TS83C51RB2-VIB TS83C51RB2-VIE ROM 64k Bytes ROM 16k Bytes ROM 16k Bytes ROM 16k Bytes ROM 16k Bytes ROM 16k Bytes ROM 16k Bytes ROM 16k Bytes ROM 16k Bytes ROM 16k Bytes ROM 16k Bytes ROM 16k Bytes ROM 16k Bytes ROM 16k Bytes ROM 16k Bytes ROM 16k Bytes ROM 16k Bytes ROM 16k Bytes 5V 5V 5V 5V 5V 5V 3-5V 3-5V 3-5V 3-5V 3-5V 3-5V 5V 5V 5V 5V 5V 5V Commercial Commercial Commercial Industrial Industrial Industrial Commercial Commercial Commercial Industrial Industrial Industrial Commercial Commercial Commercial Industrial Industrial Industrial 40 MHz (30 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) VQFP44 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 Tray Stick Tray Stick Stick Tray Stick Stick Tray Stick Stick Tray Stick Stick Tray Stick Stick Tray AT83C51RB2-3CSUM AT83C51RB2-SLSUM AT83C51RB2-RLTUM AT83C51RB2-3CSUL AT83C51RB2-SLSUL AT83C51RB2-RLTUL ROM 32k Bytes ROM 32k Bytes ROM 32k Bytes ROM 32k Bytes ROM 32k Bytes ROM 32k Bytes 5V 5V 5V 3-5V 3-5V 3-5V Industrial & Green Industrial & Green Industrial & Green Industrial & Green Industrial & Green Industrial & Green 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 Stick Stick Tray Stick Stick Tray TS83C51RC2-MCA TS83C51RC2-MCB TS83C51RC2-MCE TS83C51RC2-MIA ROM 32k Bytes ROM 32k Bytes ROM 32k Bytes ROM 32k Bytes 5V 5V 5V 5V Commercial Commercial Commercial Industrial 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) PDIL40 PLCC44 VQFP44 PDIL40 Stick Stick Tray Stick 77 4188E–8051–08/06 Part Number TS83C51RC2-MIB TS83C51RC2-MIE TS83C51RC2-LCA TS83C51RC2-LCB TS83C51RC2-LCE TS83C51RC2-LIA TS83C51RC2-LIB TS83C51RC2-LIE TS83C51RC2-VCA TS83C51RC2-VCB TS83C51RC2-VCE TS83C51RC2-VIA TS83C51RC2-VIB TS83C51RC2-VIE Memory size ROM 32k Bytes ROM 32k Bytes ROM 32k Bytes ROM 32k Bytes ROM 32k Bytes ROM 32k Bytes ROM 32k Bytes ROM 32k Bytes ROM 32k Bytes ROM 32k Bytes ROM 32k Bytes ROM 32k Bytes ROM 32k Bytes ROM 32k Bytes Supply Voltage 5V 5V 3-5V 3-5V 3-5V 3-5V 3-5V 3-5V 5V 5V 5V 5V 5V 5V Temperature Range Industrial Industrial Commercial Commercial Commercial Industrial Industrial Industrial Commercial Commercial Commercial Industrial Industrial Industrial Max Frequency 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) Package PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 Packing Stick Tray Stick Stick Tray Stick Stick Tray Stick Stick Tray Stick Stick Tray AT83C51RC2-3CSUM AT83C51RC2-SLSUM AT83C51RC2-RLTUM AT83C51RC2-3CSUL AT83C51RC2-SLSUL AT83C51RC2-RLTUL ROM 32k Bytes ROM 32k Bytes ROM 32k Bytes ROM 32k Bytes ROM 32k Bytes ROM 32k Bytes 5V 5V 5V 3-5V 3-5V 3-5V Industrial & Green Industrial & Green Industrial & Green Industrial & Green Industrial & Green Industrial & Green 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 Stick Stick Tray Stick Stick Tray TS83C51RD2-MCA TS83C51RD2-MCB TS83C51RD2-MCE TS83C51RD2-MIA TS83C51RD2-MIB TS83C51RD2-MIE TS83C51RD2-LCB TS83C51RD2-LCE TS83C51RD2-LIA TS83C51RD2-LIB TS83C51RD2-LIE TS83C51RD2-VCA TS83C51RD2-VCB ROM 64k Bytes ROM 64k Bytes ROM 64k Bytes ROM 64k Bytes ROM 64k Bytes ROM 64k Bytes ROM 64k Bytes ROM 64k Bytes ROM 64k Bytes ROM 64k Bytes ROM 64k Bytes ROM 64k Bytes ROM 64k Bytes 5V 5V 5V 5V 5V 5V 3-5V 3-5V 3-5V 3-5V 3-5V 5V 5V Commercial Commercial Commercial Industrial Industrial Industrial Commercial Commercial Industrial Industrial Industrial Commercial Commercial 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PLCC44 VQFP44 PDIL40 PLCC44 VQFP44 PDIL40 PLCC44 Stick Stick Tray Stick Stick Tray Stick Tray Stick Stick Tray Stick Stick 78 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 Part Number TS83C51RD2-VCE TS83C51RD2-VIA TS83C51RD2-VIB TS83C51RD2-VIE Memory size ROM 64k Bytes ROM 64k Bytes ROM 64k Bytes ROM 64k Bytes Supply Voltage 5V 5V 5V 5V Temperature Range Commercial Industrial Industrial Industrial Max Frequency 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) 40 MHz (30 MHz X2) Package VQFP44 PDIL40 PLCC44 VQFP44 Packing Tray Stick Stick Tray AT83C51RD2-3CSUM AT83C51RD2-SLSUM AT83C51RD2-RLTUM AT83C51RD2-3CSUL AT83C51RD2-SLSUL AT83C51RD2-RLTUL ROM 64k Bytes ROM 64k Bytes ROM 64k Bytes ROM 64k Bytes ROM 64k Bytes ROM 64k Bytes 5V 5V 5V 3-5V 3-5V 5V Industrial & Green Industrial & Green Industrial & Green Industrial & Green Industrial & Green Industrial & Green 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 40 MHz (20 MHz X2) 30 MHz (20 MHz X2) 30 MHz (20 MHz X2) 40 MHz (30 MHz X2) PDIL40 PLCC44 VQFP44 PLCC44 VQFP44 PDIL40 Stick Stick Tray Stick Tray Stick 79 4188E–8051–08/06 14. Package Drawings 14.1 PLCC44 80 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 14.2 PDIL40 81 4188E–8051–08/06 14.3 VQFP44 82 AT/TS8xC51Rx2 4188E–8051–08/06 AT/TS8xC51Rx2 14.4 VQFP64 83 4188E–8051–08/06 14.5 PLCC68 84 AT/TS8xC51Rx2 4188E–8051–08/06 A tmel Corporation 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 487-2600 Atmel Operations Memory 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 436-4314 RF/Automotive Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany Tel: (49) 71-31-67-0 Fax: (49) 71-31-67-2340 1150 East Cheyenne Mtn. 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Atmel ® , logo and combinations thereof, are registered trademarks, and Everywhere You Are® are the trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be trademarks of others. Printed on recycled paper. 4188E–8051–08/06