W925G625

W925E/C625 8-bit CID MICROCONTROLLER Table of Contents1. 2. 3. 4. 5. 6. GENERAL DESCRIPTION ......................................................................................................... 2 FEATURES ................................................................................................................................. 2 PIN CONFIGURATION ............................................................................................................... 4 PIN DESCRIPTION..................................................................................................................... 5 BLOCK DIAGRAM ...................................................................................................................... 7 FUNCTIONAL DESCRIPTION.................................................................................................... 8 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 6.10 6.11 6.12 6.13 6.14 6.15 6.16 7. 7.1 7.2 7.3 7.4 7.5 8. 9. Memory Organization ..................................................................................................... 9 Special Function Registers ........................................................................................... 12 Initial State of Registers................................................................................................ 32 Instruction ..................................................................................................................... 33 Power Management...................................................................................................... 37 Reset............................................................................................................................. 38 Interrupt......................................................................................................................... 38 Programmable Timers/Counters................................................................................... 41 Serial Port 1 .................................................................................................................. 45 Comparator ................................................................................................................... 47 DTMF Generator........................................................................................................... 47 FSK Generator.............................................................................................................. 48 I/O Ports........................................................................................................................ 49 Divider........................................................................................................................... 50 LCD............................................................................................................................... 51 Calling Identity Delivery (CID)....................................................................................... 54 Maximum Ratings*........................................................................................................ 68 Recommended Operating Conditions .......................................................................... 68 DC Characteristics ........................................................................................................ 69 Electrical Characteristics – Gain Control OP-Amplifier................................................. 70 AC Characteristics ........................................................................................................ 71 ELECTRICAL CHARACTERISTICS......................................................................................... 68 PACKAGE ................................................................................................................................. 74 REVISION HISTORY ................................................................................................................ 75 -1- Publication Release Date: July 4, 2005 Revision A10 W925E/C625 1. GENERAL DESCRIPTION The W925E/C625 is an all in one single 8-bit micro-controller with widely used Calling Identity Delivery (CID) function. The 8-bit CPU core is based on the 8051 family; therefore, all the instructions are compatible to the Turbo 8051 series. The CID part consisted of FSK decoder, DTMF receiver, CPE* Alert Signal (CAS) detector and Ring detector. Also built-in DTMF generator and FSK generator with baud rate 1200 bps (bits/sec). Using W925E/C625 can easily implement the CID adjunct box and the feature phone or Short Message Service (SMS) phone with CID function. The main features are listed in the next section. 2. FEATURES APPLICATION: The SMS phone with CID function and CID adjunct box. CPU: 8-bit micro-controller is similar to the 8051 family. EEPROM type operating voltage: µC: Depend on the operating vol. option. Either 2.4 to 3.6V or 3.0 to 5.5V for operating. If 2.4 to 3.6V be selected, the µC operating range is from 2.4 to 3.6V, else if 3.0 to 5.5V be selected, the µC operating range is from 3.0 to 5.5V. CID: 3.0 to 5.5V. MASK type operating voltage: µC: 2.2 to 5.5V. CID: 3.0 to 5.5V. Dual-clock operation: Main oscillator: 3.58MHz crystal for CID and DTMF function. And built-in RC oscillator. Sub oscillator: 32768Hz crystal. Main and sub oscillators are enable/disable by bit control individually. Up 64K bytes for program ROM. Total 64K bytes for look-up table ROM. 256 bytes on chip scratch-pad RAM. 4K bytes on chip RAM for MOVX instruction. 224 bytes on chip LCD RAM. 1792 dots: 56 Segments x 32 Common, 1/5 bias. Compatible with Bellcore TR-NWT-000030 & SR-TSV-002476, British Telecom(BT) SIN227, U.K. Cable Communication Association(CCA) specification. FSK modulator/demodulator: for Bell 202 and ITU-T V.23 FSK with 1200-baud rate. CAS detector: for dual tones of Bellcore CAS and BT Idle State and Loop State Dual Tone Alert Signal (DTAS). -2- ROM: 64K bytes internal flash EEPROM/MASK ROM type. RAM: LCD: dot matrix control method. CID: W925E/C625 DTMF generator/receiver; Ring detector: for line reversal for BT, ring burst for CCA or ring signal for Bellcore. Two independent OP amps with adjustable gain for Tip/Ring and Telephone Hybrid connections. P0: Bit and byte addressable. I/O mode can be bit controlled. Open drain type. P1~P3: Bit and byte addressable. Pull high and I/O mode can be bit controlled. P4 : Byte addressable. Pull high and I/O mode can be bit controlled. I/O: 40 I/O pins. - Note: ”CPE*” Customer Premises Equipment Power mode: Normal mode: Normal operation Dual-clock slow operation mode: System is operated by the sub-oscillator (Fosc=Fs and Fm is stopped) Idle mode: CPU hold. The clock to the CPU is halted, but the interrupt, timer and watchdog timer block work normally but CID function is disabled. Power down mode: All activity is completely stopped and power consumption is less than 1 µA. Timer: 2 13/16-bit timers, or 8-bit auto-reload timers, that are Timer0 and Timer1. Watchdog timer: WDT can be programmed by the user to serve as a system monitor. Interrupt: 11 interrupt sources with two levels of priority. 4 interrupts from INT0, INT1, INT2 and INT3. 2 interrupts from Timer0, Timer1. 1 interrupt from Serial port. 1 interrupt from CID. 1 interrupt from 13/14-bit Divider. 1 interrupt from Comparator. 1 interrupt from Watch Dog Timer. Divider: 13/14 bit divider, clock source from sub-oscillator, therefore, DIVF set every 0.25/0.5 Sec. Comparator: Comparator:1 analog input from VNEG pin, 2 reference input pins, one is from VPOS pin and another is from internal 1.0v regulator output. An 8-bit serial transceiver with SCLK and SDATA. 160pin QFP : The part numbers are W925E625 & W925C625 Lead free 160pin QFP: The part numbers are W925E625FG & W925G625 Serial port: Package: -3- Publication Release Date: July 4, 2005 Revision A10 W925E/C625 3. PIN CONFIGURATION Figure 3-1 shows the pin assignment. The package type is 160pin QFP. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 SEG1 SEG0 COM0 COM1 COM2 COM3 COM4 COM5 COM6 COM7 COM8 COM9 COM10 COM11 COM12 COM13 COM14 COM15 VLCD5 VLCD4 VLCD3 VLCD2 VLCD1 DH1 DH2 RESET/VPP TEST/MODE P47 P46 P45 P44/VPOS P43 P42/VNEG P41 160 159 158 157 156 155 154 153 152 151 150 149 148 147 146 145 144 143 142 141 140 139 138 137 136 135 134 133 132 131 130 129 128 127 126 125 124 123 122 121 SEG8 SEG9 SEG10 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 SEG24 SEG25 SEG26 SEG27 SEG28 SEG29 SEG30 SEG31 SEG32 SEG33 SEG34 SEG35 SEG36 SEG37 SEG38 SEG39 SEG40 SEG41 SEG42 SEG43 SEG44 SEG45 SEG46 SEG47 W925E/C625 P40 P37 P36 P35 P34 P33 P32 P31 P30 BUZ VDD VSS P27 P26 P25 P24 P23 P22 P21 P20 P17 P16 P15 P14 P13 P12 P11 P10 DTMF/FSK EA/DATA XOUT2 XIN2 VDD XIN1 XOUT1 P07 P06 P05 P04 P03 120 119 118 117 116 115 114 113 112 111 110 109 108 107 106 105 104 103 102 101 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 U? 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 SEG48 SEG49 SEG50 SEG51 SEG52 SEG53 SEG54 SEG55 COM16 COM17 COM18 COM19 COM20 COM21 COM22 COM23 COM24 COM25 COM26 COM27 COM28 COM29 COM30 COM31 VAD INP2 INN2 GCFB2 VAS GCFB1 INN1 INP1 VREF CAP RNGDI RNGRC VSS P00 P01 P02 Figure 3-1 W925E/C625 Pin Configuration -4- W925E/C625 4. PIN DESCRIPTION SYMBOL I/O DESCRIPTION TEST/MODE EA /DATA RESET /VPP I/O I,I/O I I TEST pin. In E version (EEPROM type), it works as a Mode pin to select programming mode. In C version (Mask type), this pin with internal pull-low resistor. Set high for normal function. In E version, it works as Data pin. In C version, this pin with internal pull-high resistor. RESET pin. A low pulse causes the whole chip reset. In E version, this pin work as VPP pin, which is a supply programming voltage. In C version, this pin with internal pull-high resistor. Ring Detect Input (Schmitt trigger input). Used for ring detection and line reversal detection. Must maintain a voltage between VAD and VAS. Ring RC (Open drain output and Schmitt trigger input). Used to set the time interval from the end of RNGDI pin to the inactive condition of the RNGON pin. An external resistor must connected to VAD and a capacitor connected to VSS, the time interval is the RC time constant. Must be connected 0.1µF capacitor to VSS. Reference Voltage. Nominally, VDD/2 is used to bias the input of the gain control op-amp. Op-amp1 Feed-back Gain Control signal. Select the input gain by connecting this pin and the INN1 pin with feedback resistor. It is recommended that the op-amp1 be set to unity gain. Inverting Input of the gain control op-amp1. Non-inverting Input of the gain control op-amp1. Op-amp2 Feed-back Gain Control signal. Select the input gain by connecting this pin and the INN2 pin with feedback resistor. It is recommended that the op-amp2 be set to unity gain. Inverting Input of the gain control op-amp2. Non-inverting Input of the gain control op-amp2. Analog voltage supply. Analog ground. Digital voltage supply. Digital ground. Output pin for main-oscillator. Connected to 3.58MHz crystal for CID function. Input pin for main-oscillator. Connected to 3.58MHz crystal for CID function. Output pin for sub-oscillator. Connected to 32.768KHz crystal only. Suggest to add an external capacitor about 10~30pF to ground (VSS) for the accuracy of the oscillator. RNGDI RNGRC CAP VREF GCFB1 INN1 INP1 GCFB2 INN2 INP2 VAD VAS VDD VSS XOUT1 XIN1 XOUT2 O O O O I I O I I I I I I O I O -5- Publication Release Date: July 4, 2005 Revision A10 W925E/C625 Pin Description, continued SYMBOL I/O DESCRIPTION XIN2 I Input pin for sub-oscillator. Connected to 32.768KHz crystal only. Suggest to add an external capacitor about 10~30Pf to ground (VSS) for the accuracy of the oscillator. FTE=0, Dual-Tone Multi-Frequency(DTMF) signal output FTE=1, FSK signal output Buzzer output pin. If buzzer function is disabled, BUZ pin is in floating state. Input/Output port0. Port0 data can be bit controlled. The I/O mode is controlled by P0IO register. Port0 is open drain type when it is configured as output mode. Input/Output port1 with pull high resistors. Port1 data can be bit controlled. The I/O mode is controlled by P1IO register. The P10-P13 and P14-P17 indicates the external interrupt pins(INT2 and INT3) Input/Output port2 with pull high resistors. Port2 data can be bit controlled. The I/O mode is controlled by P2IO register. Input/Output port3 with pull high resistors. Port3 data can be bit controlled. The I/O mode is controlled by P3IO register. The special function of port3 is referred to the description of P3 register. Contents are byte controlled. Pull high and I/O mode can be bit controlled. The special function of P4 is referred to the description of P4 register. The comparator V+, V- analog input pins. Share pin with P4.2 and P4.4 Connection terminals for LCD voltage doublers capacitor. Positive LCD voltage supplies terminals. LCD segment output pins. LCD common output pins. DTMF/FSK BUZ P00-P07 O O I/O P10-P17 P20-P27 P30-P37 I/O I/O I/O P40-P47 VPOS, VNEG DH1,DH2 VLCD1-5 SEG0SEG55 COM0COM31 I/O I I I O O -6- W925E/C625 5. BLOCK DIAGRAM Internal CID and uC interface RNGDI RNGRC INP1 INN1 GCFB1 INP2 INN2 GCFB2 VREF CAP CIDE FSKE CASE P0 P1 P2 P3 P4 8 8 8 8 8 FSK,CAS (W91030) RNG ALGO FDR FCD CASH,CASL CASPT CASAT DTMFD DTMFPT DTMFAT DTMFE DTMF RECEIVER DCLK DATA RST S/P DCLK FDATA FD7~FD0 DTMFH DTMFL DD3~DD0 FM Fosc D-latch ck RNGF ALGOF FDRF DTMFDF FSF 8-bit µC FSK modulator 5 X I N 1 X O U T 1 X I N 2 XVVVV ODsAA UDSDS T 2 SEG00 ~ SEG55 COM00 ~ COM31 DD HH 12 VLCD1 ~ VLCD5 B U Z D T M F / F S K R E S E T / V P P E A / D A T A TEST/MODE -7- Publication Release Date: July 4, 2005 Revision A10 W925E/C625 6. FUNCTIONAL DESCRIPTION The W925E/C625 is an 8-bit micro-controller with CID function. The 8-bit micro-control has the same instruction set as the 8051 family, with one addition: DEC DPTR (op-code A5H, the DPTR is decreased by 1). In addition, the W925E/C625 contains on-chip 4K + 224 bytes MOVX RAM. ROM: There are 64K bytes EEPROM/MASK ROM. The total 64K bytes EEPROM/MASK ROM is used for program code. The completely 64K bytes EEPROM/MASK ROM can be used for the look-up table memory. On-chip Data RAM: The W925E/C625 has 4K normal RAM + 224 Bytes of discontinuity LCD RAM which address is from 0000H to 0FFFH + 2000H to 20FEH. It only can be accessed by MOVX instruction; this on-chip RAM is optional under software control. The 224 bytes of RAM, which no appends to the 4K bytes RAM, are used for LCD RAM. The on-chip data RAM is not used for executable program memory. There is no conflict or overlap among the 256 bytes scratchpad RAM and the 4K Bytes MOVX RAM as they use different addressing modes and separate instructions. CID: The CID functions include the FSK decoder, CAS detector, and DTMF decoder and ring detector. FSK modulator: Support ITU-T V.23 and Bellcore 202 FSK transmit modulate signal DTMF modulator: The W925E/C625 built-in Dual tone multi-frequency generator. I/O Ports: The W925E/C625 has five 8-bit I/O ports giving 40 lines. Port0 to Port3 can be used as an 8-bit general I/O port with bit-addressable. The I/O mode of each port are controlled by PxIO registers. Port 1 to Port 4 have internal pull high resistors enabled/disabled by PxH registers. Port0 is open-drain type in output mode. Serial I/O port: The serial port, through P4.0 (SCLK) and P4.1 (SDATA), is an 8-bit synchronous serial I/O interface. Timers: The W925E/C625 has two 13/16-bit timers or 8 bits auto-reload timers. An independent watchdog timer is used as a System Monitor or as a very long time period timer. A divider can produce the divider interrupt in every period of 0.5S or 0.25S. Comparator: The W925E/C625 has an internal comparator with one external analog signal input path VNEG and an external path VPOS or a regulator voltage for the reference input REF1. LCD: The LCD display of 1792 dots is 1/5 bias with 56 segments and 32 commons. The LCD display of The LCD voltage is from internal regulator or external voltage source. -8- W925E/C625 Interrupts: The W925E/C625 provides 11 interrupt resources with two priority level, including 4 external interrupt sources, 2 timer interrupts, 1 CID interrupt, 1 divider interrupt, 1 serial port interrupt, 1 comparator interrupt and 1 watchdog timer interrupt. Power Management: The W925E/C625 has IDLE and POWER DOWN modes of operation. In the IDLE mode, the clock to the CPU core is stopped however the functions of the timers, divider, CID and interrupts are active continuously. In the POWER DOWN mode, both of the system clock stop oscillating and the chip operation is completely stopped. POWER DOWN mode is the state of the lowest power consumption. 6.1 Memory Organization The W925E/C625 separates the memory into two separate sections, the Program Memory and the Data Memory. The Program Memory is used to store the instruction op-codes and look-up table data, while the Data Memory is used to store data or for memory mapped devices. Program Memory: The Program Memory on the W925E/C625 can be up to 64K bytes. The total 64K bytes EEPROM/MASK ROM are used to store the op-codes and the whole 64K can be used to store lookup table data. 00000 64K bytes EEPROM / MASK ROM 0FFFF Figure 6-1 Program Memory Map Data Memory: The W925E/C625 contains on-chip 4K + 224 bytes MOVX RAM of Data Memory, which can only be accessed by MOVX instructions from the address 0000H to 0FFFH and from 2000H to 20FEH. In addition, the W925E/C625 has 256 bytes of on-chip scratchpad RAM. This can be accessed either by direct addressing or by indirect addressing. There are also Special Function Registers (SFRs), which can only be accessed by direct addressing. Since the scratchpad RAM is only 256 bytes, it can be used only when data contents are small. In the event that larger data contents are present, the only one selection is on-chip MOVX RAM. The on-chip MOVX RAM can only be accessed by a MOVX instruction. However, the on-chip RAM has the fastest access times. The memory map is shown Figure 6-2 and Figure 6-3 shows the scratchpad RAM/Register addressing. -9- Publication Release Date: July 4, 2005 Revision A10 W925E/C625 FFH 80H 7FH 00H 20FEH 2000H Indirect Addressing RAM Direct & Indirect Addressing RAM SFRs Direct Addressing only LCDRAM0FE | | LCDRAM000 0FFFH 4K byte SRAM On chip 0000H Figure 6-2 Memory Map - 10 - W925E/C625 FFh 80h 7Fh 30h 2Fh 2Eh 2Dh 2Ch 2Bh 2Ah 29h 28h 27h 26h 25h 24h 23h 22h 21h 20h 1Fh 18h 17h 10h 0Fh 08h 07h 00h Indirect RAM Direct RAM 7F 77 6F 67 5F 57 4F 47 3F 37 2F 27 1F 17 0F 07 7E 76 6E 66 5E 56 4E 46 3E 36 2E 26 1E 16 0E 06 7D 75 6D 65 5D 55 4D 45 3D 35 2D 25 1D 15 0D 05 7C 74 6C 64 5C 54 4C 44 3C 34 2C 24 1C 14 0C 04 Bank 3 Bank 2 Bank 1 Bank 0 7B 73 6B 63 5B 53 4B 43 3B 33 2B 23 1B 13 0B 03 7A 72 6A 62 5A 52 4A 42 3A 32 2A 22 1A 12 0A 02 79 71 69 61 59 51 49 41 39 31 29 21 19 11 09 01 78 70 68 60 58 50 48 40 38 30 28 20 18 10 08 00 Bit Addressable 20H- 2FH Figure 6-3 Scratchpad RAM/Register Addressing - 11 - Publication Release Date: July 4, 2005 Revision A10 W925E/C625 6.2 Special Function Registers The W925E/C625 uses Special Function Registers (SFRs) to control and monitor peripherals and their Modes. The SFRs reside in the register locations 80-FFh and accessed by direct addressing only. Some of the SFRs are bit addressable. This is very useful in cases where one wishes to modify a particular bit without changing the others. The SFRs that are bit addressable are those whose addresses end in 0 or 8. The list of SFRs is as follows. The table is condensed with eight locations per row. Empty locations indicate that there are no registers at these addresses. The content of reserved bits or registers is not guaranteed. Table 1 Special Function Register Location Table F8 F0 E8 E0 D8 D0 C8 C0 B8 B0 A8 A0 98 90 88 80 P1 TCON P0 EXIF TMOD SP TL0 DPL EIP B EIE ACC WDCON PSW DIVC SCON1 IP P3 IE P2 HB P4H P1EF P1SR TL1 DPH P0IO TH0 DPL1 P1H P1IO TH1 DPH1 CIDR SBUF1 REGVC DTMFG CIDFG COMPR CIDPCR PMR IRC1 FSKDR STATUS IRC2 DTMFDR FSKTC CASPT DTMFPT P4IO P4 P2H P2IO CKCON1 DPS P3H P3IO CKCON2 PCON FSKTB CASAT DTMFAT CIDGD CIDGA Note: The SFRs in the column with dark borders are bit-addressable. - 12 - W925E/C625 A brief description of the SFRs now follows. PORT 0 Bit: 7 P0.7 Mnemonic: P0 P0: 6 P0.6 5 P0.5 4 P0.4 3 P0.3 (initial=FFH,input mode) 2 P0.2 1 P0.1 0 P0.0 Address: 80h P0 can be selected as input or output mode by the P0IO register, at initial reset, P0IO is set to FFH, P0 is used as input mode. When P0IO is set to 0, the P0 is used as CMOS open drain mode. (initial=07H) Bit: 7 SP.7 Mnemonic: SP 6 SP.6 5 SP.5 4 SP.4 3 SP.3 2 SP.2 1 SP.1 0 SP.0 STACK POINTER Address: 81h SP: The Stack Pointer stores the scratchpad RAM address where the stack begins. In other words, it always points to the top of the stack. (initial=00H) 7 DPL.7 Mnemonic: DPL 6 DPL.6 5 DPL.5 4 DPL.4 3 DPL.3 2 DPL.2 1 DPL.1 0 DPL.0 DATA POINTER LOW Bit: Address: 82h DPL: This is the low byte of the standard 8052 16-bit data pointer. DATA POINTER HIGH Bit: 7 DPH.7 Mnemonic: DPH DPH: This is the high byte of the standard 8052 16-bit data pointer. DATA POINTER LOW1 Bit: 7 6 5 4 3 (initial=00H) 2 1 0 6 DPH.6 5 DPH.5 4 DPH.4 3 DPH.3 (initial=00H) 2 DPH.2 1 DPH.1 0 DPH.0 Address: 83h DPL1.7 DPL1.6 DPL1.5 DPL1.4 DPL1.3 DPL1.2 DPL1.1 DPL1.0 Mnemonic: DPL1 Address: 84h - 13 - Publication Release Date: July 4, 2005 Revision A10 W925E/C625 DPL1: This is the low byte of the new additional 16-bit data pointer. That has been added to the W925E/C625. The user can switch between DPL, DPH and DPL1, DPH1 simply by setting register DPS.0 = 1. The instructions that use DPTR will now access DPL1 and DPH1 in place of DPL and DPH. If they are not required, they can be used as conventional register locations by the user. (initial=00H) 7 6 5 4 3 2 1 0 DATA POINTER HIGH1 Bit: DPH1.7 DPH1.6 DPH1.5 DPH1.4 DPH1.3 DPH1.2 DPH1.1 DPH1.0 Mnemonic: DPH1 DPH1: Address: 85h This is the high byte of the new additional 16-bit data pointer. That has been added to the W925E/C625. The user can switch between DPL, DPH and DPL1, DPH1 simply by setting register DPS = 1. The instructions that use DPTR will now access DPL1 and DPH1 in place of DPL and DPH. If they are not required, they can be used as conventional register locations by the user. (initial=00H) 7 Mnemonic: DPS 6 5 4 3 2 Address: 86h 1 0 DPS.0 DATA POINTER SELECT Bit: DPS.0: This bit is used to select either the DPL,DPH pair or the DPL1,DPH1 pair as the active Data Pointer. When set to 1, DPL1,DPH1 will be selected, otherwise DPL,DPH will be selected. DPS.1-7:These bits are reserved, but will read 0. POWER CONTROL Bit: 7 Mnemonic: PCON IDLT: 6 5 4 IDLT 3 GF1 (initial=00H) 2 GF0 Address: 87h 1 PD 0 IDL This bit controls the idle mode type. In idle mode when idle mode is released by any interrupt, if IDLT=1 it will not jump to the corresponding interrupt; if IDLT=0 it will jump to the corresponding interrupt. These two bits are general-purpose user flags. Setting this bit causes the W925E/C625 to go into the POWER DOWN mode. In this mode, all the clocks are stopped and program execution is frozen. Power down mode can be released by INT0~INT3 and ring detection of CID interrupt. Setting this bit causes the W925E/C625 to go into the IDLE mode. The type of idle mode is selected by IDLT. In this mode the clocks to the CPU are stopped, so program execution is frozen. However, the clock path to the timers blocks and interrupt blocks is not stopped, and these blocks continue operating. GF1-0: PD: IDL: - 14 - W925E/C625 TIMER CONTROL Bit: 7 TF1 Mnemonic: TCON 6 TR1 5 TF0 4 TR0 3 IE1 (initial=00H) 2 IT1 1 IE0 0 IT0 Address: 88h TF1: Timer 1 overflows flag. This bit is set when Timer 1 overflows. It is cleared automatically when the program does a timer 1 interrupt service routine. Software can also set or clear this bit. TR1: Timer 1 runs control. This bit is set or cleared by software to turn timer on or off. TF0: Timer 0 overflows flag. This bit is set when Timer 0 overflows. It is cleared automatically when the program does a timer 0 interrupt service routine. Software can also set or clear this bit. TR0: Timer 0 runs control. This bit is set or cleared by software to turn timer on or off. IE1: Interrupt 1 edge detect: Set by hardware when an edge/level is detected on INT1 . This bit is cleared by hardware when the service routine is vectored to only if the interrupt was edge triggered. Otherwise, it follows the pin. Interrupt 1 type control: Set/cleared by software to specify falling edge/ low level triggered external inputs. Interrupt 0 edge detect: Set by hardware when an edge/level is detected on INT0 . This bit is cleared by hardware when the service routine is vectored to only if the interrupt was edge triggered. Otherwise, it follows the pin. Interrupt 0 type control. Set/cleared by software to specify falling edge/ low level triggered external inputs. (initial=00H) 7 GATE Mnemonic: TMOD Bit7~4 control timer 1, bit3~0 control timer0 GATE: Gating control. When this bit is set, Timer x is enabled only while INTx pin is high and TRx control bit is set. When cleared, Timer x is enabled whenever TRx control bit is set. C/ T : Timer or Counter Select. When cleared, the timer is incremented by internal clocks. When set, the timer counts high-to-low edges of the Tx pin. 6 C/ T 5 M1 4 M0 3 GATE 2 C/ T Address: 89h 1 M1 0 M0 IT1: IE0: IT0: TIMER MODE CONTROL Bit: Note: X is either 0 or 1. M1, M0: Mode Select bits: M1 0 0 1 1 M0 0 1 0 1 Mode Mode 0: 13-bits timer Mode 1: 16-bits timer Mode 2: 8-bits with auto-reload from Thx Reserved Publication Release Date: July 4, 2005 Revision A10 - 15 - W925E/C625 TIMER 0 LOW BYTE Bit: 7 TL0.7 Mnemonic: TL0 TL0.7-0: Timer 0 low byte register. TIMER 1 LOW BYTE Bit: 7 TL1.7 Mnemonic: TL1 TL1.7-0: Timer 1 low byte register. TIMER 0 HIGH BYTE Bit: 7 TH0.7 Mnemonic: TH0 TH0.7-0: Timer 0 high byte register. TIMER 1 HIGH BYTE Bit: 7 TH1.7 Mnemonic: TH1 TH1.7-0: Timer 1 high byte register. CLOCK CONTROL1 Bit: 7 WD1 Mnemonic: CKCON1 6 WD0 5 T1S1 4 T1S0 3 T0S1 (initial=00H) 2 T0S0 1 DIVS 0 M /S (initial=00H) 6 TL0.6 5 TL0.5 4 TL0.4 3 TL0.3 2 TL0.2 1 TL0.1 0 TL0.0 Address: 8Ah (initial=00H) 6 TL1.6 5 TL1.5 4 TL1.4 3 TL1.3 2 TL1.2 1 TL1.1 0 TL1.0 Address: 8Bh (initial=00H) 6 TH0.6 5 TH0.5 4 TH0.4 3 TH0.3 2 TH0.2 1 TH0.1 0 TH0.0 Address: 8Ch (initial=00H) 6 TH1.6 5 TH1.5 4 TH1.4 3 TH1.3 2 TH1.2 1 TH1.1 0 TH1.0 Address: 8Dh Address: 8Eh WD1-0: Watchdog timer mode select bits: These bits determine the time-out period for the watchdog timer. In all four time-out options, the reset time-out is 512 clocks more than the interrupt timeout period. WD1 0 0 1 1 WD0 0 1 0 1 Interrupt time-out Fosc/2 12 Reset time-out Fosc/212 + 512 Fosc/215 + 512 Fosc/218 + 512 Fosc/221 + 512 Fosc/215 Fosc/218 Fosc/221 - 16 - W925E/C625 T0S0-1&T1S0-1: Timer0 & Timer1 clock source mode select bits. These bits determine the timer0 & timer1 clock source. T0S1 (T1S1) 0 0 1 1 T0S0 (T1S0) 0 1 0 1 Prescale clock source Fosc/22 Fosc/26 Fosc/210 Fs DIVS: Divider clock source control bit 1: DIVS = 0 : Fs/213 DIVS= 1 : Fs/214 M /S: System clock source control bit : M /S = 0 : Fosc = XIN1 ( FM) M /S = 1 : Fosc = XIN2 ( Fs) CLOCK CONTROL2 Bit: 7 6 5 KT1 4 KT0 3 - (initial=00H) 2 Address: 8Fh 1 0 - ENBUZ BUZSL Mnemonic: CKCON2 ENBUZ: When ENBUZ=1 the BUZ pin works as buzzer output, otherwise BUZ pin is in floating state. BUZSL: Buzzer output selection. When BUZSL=0 BUZ is the output of octave tone. When BUZZL=1, BUZ is the output of key tone. KT1-0: Key tone frequency sources from divider. When divider is enable, KT1 and KT0 determines the key tone frequency. KT1 KT0 KEY TONE FREQUENCY 0 0 1 1 PORT 1 Bit: 7 0 1 0 1 Low 512Hz 1024Hz 2048Hz (initial=FFH,input mode) 6 P1.6 5 P1.5 4 P1.4 3 P1.3 2 P1.2 1 P1.1 0 P1.0 P1.7 Mnemonic: P1 Address: 90h P1.7-0: P1 can be selected as input or output mode by the P1IO register, at initial reset, P1IO is set to 1, so P1 is used as input mode . When P1IO is set to 0, the P1 is used as CMOS output mode. When P1EF are set and P1IO are set as input mode, P1 can be used as external interrupt source. The functions are listed below. - 17 - Publication Release Date: July 4, 2005 Revision A10 W925E/C625 P1.0 : INT2.0 P1.1 : INT2.1 P1.2 : INT2.2 P1.3 : INT2.3 P1.4 : INT3.0 P1.5 : INT3.1 P1.6 : INT3.2 P1.7 : INT3.3 External Interrupt 2 External Interrupt 2 External Interrupt 2 External Interrupt 2 External Interrupt 3 External Interrupt 3 External Interrupt 3 External Interrupt 3 (initial=00H) 6 5 4 COMPF 3 DIVF 2 CIDF Address: 91h 1 IE3 0 IE2 EXTERNAL INTERRUPT FLAG Bit: 7 Mnemonic: EXIF DIVF: Divider overflows flag. COMPF: Comparator flag. Set by hardware when RESC bit is from low to high. CIDF: CID interrupts flag. Set by hardware when at least one of CID flags is set. IE3: IE2: External Interrupt 3 flag. Set by hardware when a falling edge is detected on INT3. External Interrupt 2 flag. Set by hardware when a falling edge is detected on INT2. (initial=00H) Bit: 7 6 5 4 3 2 1 0 P1 PINS STATUS P1.7SR P1.6SR P1.5SR P1.4SR P1.3SR P1.2SR P1.1SR P1.0SR Mnemonic: P1SR Address: 93h P1SR: Set when a falling edge is detected on the corresponding P1 pin, clear by software. P0 I/O PORT CONTROL Bit: 7 P0.7IO Mnemonic: P0IO P0IO: P0 pins I/O control. 1: input mode 0: output mode P1 I/O PORT CONTROL Bit: 7 P1.7IO Mnemonic: P1IO 6 P1.6IO 5 P1.5IO 4 P1.4IO 3 P1.3IO (initial=FFH) 2 P1.2IO 1 P1.1IO 0 P1.0IO 6 P0.6IO 5 P0.5IO 4 P0.4IO 3 P0.3IO (initial=FFH) 2 P0.2IO 1 P0.1IO 0 P0.0IO Address: 94h Address: 95h - 18 - W925E/C625 P1IO: P1 pins I/O control. 1: input mode 0: output mode P2 I/O PORT CONTROL Bit: 7 P2.7IO Mnemonic: P2IO P2IO: P2 pins I/O control. 1: input mode 0: output mode P3 I/O PORT CONTROL Bit: 7 P3.7IO Mnemonic: P3IO P3IO: P3 pins I/O control. 1: input mode 0: output mode P1 PINS INTERRUPT EABLE Bit: 7 6 5 4 3 (initial=00H) 2 1 0 6 P3.6IO 5 P3.5IO 4 P3.4IO 3 P3.3IO (initial=FFH) 2 P3.2IO 1 P3.1IO 0 P3.0IO 6 P2.6IO 5 P2.5IO 4 P2.4IO 3 P2.3IO (initial=FFH) 2 P2.2IO 1 P2.1IO 0 P2.0IO Address: 96h Address: 97h P1.7EF P1.6EF P1.5EF P1.4EF P1.3EF P1.2EF P1.1EF P1.0EF Mnemonic: P1EF P1EF: P1 pins interrupt function enabled/disabled register 0: disable 1: enable P1 PULL-HIGH CONTROL Bit: 7 P1.7H Mnemonic: P1H P1H: Port1 pins pull-high resistor enable/disable 1: enable 0: disable 6 P1.6H 5 P1.5H 4 P1.4H 3 P1.3H (initial=00H) 2 P1.2H 1 P1.1H 0 P1.0H Address: 9Bh Address: 9Dh - 19 - Publication Release Date: July 4, 2005 Revision A10 W925E/C625 P2 PULL-HIGH CONTROL Bit: 7 P2.7H Mnemonic: P2H P2H: Port1 pins pull-high resistor enable/disable 1: enable 0: disable P3 PULL-HIGH CONTROL Bit: 7 P3.7H Mnemonic: P3H P3H: Port1 pins pull-high resistor enable/disable 1: enable 0: disable PORT 2 Bit: 7 P2.7 Mnemonic: P2 6 P2.6 5 P2.5 4 P2.4 3 P2.3 (initial=FFH,input mode) 2 P2.2 1 P2.1 0 P2.0 6 P3.6H 5 P3.5H 4 P3.4H 3 P3.3H (initial=00H) 2 P3.2H 1 P3.1H 0 P3.0H 6 P2.6H 5 P2.5H 4 P2.4H 3 P2.3H (initial=00H) 2 P2.2H 1 P2.1H 0 P2.0H Address: 9Eh Address: 9Fh Address: A0h P2.7-0: Port 2 is an I/O port with internal pull-high resistor. P2 can be selected as input or output mode by the P2IO register. At initial reset, P2 is used as input mode. When P2IO is set to 0, P2 is used as CMOS output mode. HIGH BYTE REGISTER Bit: 7 HB.7 Mnemonic: HB 6 HB.6 5 HB.5 4 HB.4 3 HB.3 (initial=00H) 2 HB.2 1 HB.1 0 HB.0 Address: A1h This register contains the high byte address during execution of “ MOVX @Ri, “ instructions. P4 PULL-HIGH CONTROL Bit: 7 P4.7H Mnemonic: P4H P4H: Port4 pins pull-high resistor enable/disable 1: enable 0: disable - 20 6 P4.6H 5 P4.5H 4 P4.4H 3 P4.3H (initial=00H) 2 P4.2H 1 P4.1H 0 P4.0H Address: A2h W925E/C625 PORT 4 Bit: 7 P4.7 Mnemonic: P4 6 P4.6 5 P4.5 4 P4.4 3 P4.3 (initial=FFH,input mode) 2 P4.2 Address: A6h 1 P4.1 0 P4.0 P4.7-0: Port 4 is a I/O port with internal pull-high resistor. P4 can be selected as input or output mode by the P4IO register, at initial reset, P4IO is set to 0FFh, P4 is used as input mode. When P4IO is set to 00h, P4 is used as CMOS output mode. Special function of P4 is described below. P4.4 P4.2 P4.1 P4.0 VPOS VNEG SDATA SCLK Positive input of the comparator Negative input of the comparator Serial port data I/O Serial port clock I/O (initial=00H) 7 EA Mnemonic: IE EA: Global enable. Enable/disable all interrupts. ES1: Enable Serial port interrupt ET1: Enable Timer 1 interrupt EX1: Enable external interrupt 1 ET0: Enable Timer 0 interrupt EX0: Enable external interrupt 0 P4 I/O PORT CONTROL Bit: 7 P4.7IO Mnemonic: P4IO P4IO: P4 pins I/O control. 1: input mode 0: output mode PORT 3 Bit: 7 P3.7 Mnemonic: P3 6 P3.6 5 P3.5 4 P3.4 3 P3.3 (initial=FFH,input mode) 2 P3.2 1 P3.1 0 P3.0 6 P4.6IO 5 P4.5IO 4 P4.4IO 3 P4.3IO (initial=FFH) 2 P4.2IO 1 P4.1IO 0 P4.0IO 6 ES1 5 4 3 ET1 2 EX1 1 ET0 0 EX0 INTERRUPT ENABLE Bit: Address: A8h Address: Aeh Address: B0h Publication Release Date: July 4, 2005 Revision A10 - 21 - W925E/C625 P3.7-0: P3 can be selected as input or output mode by the P3IO register, at initial reset, P3IO is set to 0FFH, P3 is used as input mode. When P3IO is set to 00h, the P3 is used as CMOS output mode. Special function of P3 is described below. P3.5 P3.4 P3.3 P3.2 CID REGISTER Bit: 7 Mnemonic: CIDR FCLK: FSK serial clock with the baud rate of 1200Hz. FDATA: FSK serial bit data. FCD: Set when FSK carrier is detected. Cleared when FSK carrier is disappeared. DTMFD: Set when DTMF decoded data is ready. Cleared when DTMF signal ends. FDR: Set when FSK 8 bits data is ready. Cleared before next FSK start bit comes ALGO: Dual tone Alert signal Guard time detect signal. Set when a guard time qualified dual tone alert signal has been detected. Cleared when the guard time qualified dual tone alert signal is absent. RNG: Ring detection bit. High to indicate the detection of line reversal and/or ringing. CID FLAG GENERATOR Bit: 7 Mnemonic: CIDFG FSF: Set when FSK Latch clock low to high. Cleared by software DTMFDF: Set when DTMFD low to high. Cleared by software FDRF: Set when FDR low to high. Cleared by software. ALGOF: Set when ALGO low to high. Cleared by software. RNGF: Set when RNG low to high. Cleared by software. CID POWER CONTROL REGISTER Bit: 7 Mnemonic: CIDPCR 6 5 4 CIDE (initial=00H) 3 2 FSKE Address: B3h 1 CASE 0 DTMFE 6 5 4 FSF (initial=00H) 3 2 Address: B2h 1 ALGOF 0 RNGF 6 FCLK 5 FDATA 4 FCD T1 T0 INT1 Timer/Counter 1 external count input Timer/Counter 0 external count input External interrupt 1 External interrupt 0 (initial=00H,read only) 3 DTMFD 2 FDR Address: B1h 1 ALGO 0 RNG INT0 This SFR indicates the CID signal immediately. Register data is set or cleared by hardware only. DTMFDF FDRF - 22 - W925E/C625 CIDE: Global enable CID function. Low to disable all functions of CID parts. FSKE: Enable FSK demodulation circuit. CASE: Enable Dual Tone Alert Signal detection circuit. DTMFE: Enable DTMF demodulation circuit. FSK DATA REGISTER Bit: 7 FD7 Mnemonic: FSKDR FD7-0: 8 bits FSK demodulated data. (initial=XXH) 7 CASH CASH: CASL: 6 CASL 5 4 3 DD3 2 DD2 Address: B5h 1 DD1 0 DD0 6 FD6 5 FD5 4 FD4 (initial=XXH) 3 FD3 2 FD2 Address: B4h 1 FD1 0 FD0 DTMF DATA REGISTER Bit: DTMFH DTMFL Mnemonic: DTMFDR Set when Dual Tone Alert Signal high tone is detected. Set when Dual Tone Alert Signal low tone is detected. DTMFH: Set when DTMF high tone is detected. DTMFL: Set when DTMF low tone is detected. DD3-0: 4 bits DTMF demodulated data. (initial=19H) 6 DPT6 5 DPT5 4 DPT4 3 DPT3 2 DPT2 Address: B6h 1 DPT1 0 DPT0 DTMF PRESENT TIME REGISTER Bit: 7 DPT7 Mnemonic: DTMFPT The clock period of guard-time timer is 0.8582Ms. The default DTMF present time is 21.45Ms. DPT7-0: The pre-set data register for counting DTMF present time. When DTMF is detected(Est low to high), the guard timer starts to up-count from 00H. As the guard timer is equal to the value of DTMFPT, the exist of the DTMF is accepted. Est changes to low state to stop and reset the counter. DTMF ABSENT TIME REGISTER Bit: 7 DAT7 Mnemonic: DTMFAT 6 DAT6 5 DAT5 4 DAT4 3 DAT3 (initial=19H) 2 DAT2 Address: B7h 1 DAT1 0 DAT0 The clock period of guard-time timer is 0.8582Ms. The default DTMF absent time is 21.45Ms. - 23 - Publication Release Date: July 4, 2005 Revision A10 W925E/C625 DAT7-0:The pre-set data register for counting DTMF absent time. When DTMF is absent(Est high to low), the guard timer starts to up-count from 00H. As the guard timer is equal to the value of DTMFAT, the finish of DTMF is recognized. Est changes to low state to stop and reset the counter. INTERRUPT PRIORITY Bit: 7 Mnemonic: IP IP.7: This bit is un-implemented and will read high. PS1: This bit defines the Serial port interrupt priority. PS1 = 1 sets it to higher priority level PT1: This bit defines the Timer 1 interrupt priority. PT1 = 1 sets it to higher priority level. PX1: This bit defines the External interrupt 1 priority. PX1 = 1 sets it to higher priority level. PT0: This bit defines the Timer 0 interrupt priority. PT0 = 1 sets it to higher priority level. PX0: This bit defines the External interrupt 0 priority. PX0 = 1 sets it to higher priority level. DTMF GENERATOR REGISTER Bit: 7 Mnemonic: DTMFG L1 L0 H1 H0 (initial=00H) 6 PS1 5 4 3 PT1 2 PX1 1 PT0 0 PX0 Address: B8h (initial=00H) 6 DTGE 5 HE 4 LE 3 L1 2 L0 Address: Bah SELECTED TONE 1 H1 0 H0 x x x x 0 0 1 1 x x x x 0 1 0 1 0 0 1 1 x x x x 0 1 0 1 x x x x 1209Hz 1336Hz 1477Hz 1633Hz 697Hz 770Hz 852Hz 941Hz LE: Enable low group frequency output. HE: Enable high group frequency output. DTGE: Enable dual tone output to DTMF pin. COMPARATOR REGISTER Bit: 7 6 5 4 3 RESC 2 REF (initial=00H) 1 0 COMPEN Mnemonic: COMPR - 24 - Address: BBh W925E/C625 RESC: Result of the comparator. Set when positive analog input voltage is(VPOS or 1.0v internal regular output) higher than negative analog input voltage(VNEG) RESC is a read only bit. REF=0 reference input from analog input voltage(VPOS/P4.4) pin. REF=1 reference input from the internal regulator output. REF: COMPEN: COMPEN=0 Disable comparator COMPEN=1 Enable comparator IDLE RELEASED CONDITION REGISTER 1 Bit: 7 Mnemonic: IRC1 6 IRCS1 5 4 3 IRCT1 2 (initial=00H) 1 IRCT0 0 IRCX0 IRCX1 Address: BCh One of the bits of IRC1 and IRC2 will be set by hardware to record the idle released condition when the idle mode is released. IRC1 and IRC2 can be set by hardware and can be R/W by software. IRCS1: Idle mode released by Serial port interrupt flag. IRCT1: Idle mode released by Timer 1 interrupt flag. IRCX1: Idle mode released by external interrupt 1 flag. IRCT0: Idle mode released by Timer 0 interrupt flag. IRCX0: Idle mode released by external interrupt 0 flag. IDLE RELEASED CONDITION REGISTER 2 Bit: 7 Mnemonic: IRC2 6 5 4 3 2 (initial=00H) 1 IRCX3 0 IRCX2 IRCWDI IRCCOMP IRCDIV IRCCID Address: BDh One of the bits of IRC1 and IRC2 will be set by hardware to record the idle released condition when the idle mode is released. IRC1 and IRC2 can be set by hardware and can be R/W by software. IRCWDI: Idle mode released by Watchdog timer interrupt flag. IRCCOMP: Idle mode released by comparator interrupt flag. IRCDIV: Idle mode released by Divider interrupt flag. IRCCID: Idle mode released by CID interrupt flag. IRCX3: Idle mode released by External Interrupt 3 flag. IRCX2: Idle mode released by External Interrupt 2 flag. - 25 - Publication Release Date: July 4, 2005 Revision A10 W925E/C625 CAS TONE PRESENT TIME REGISTER Bit: 7 6 5 4 3 (initial=0FH) 2 Address: Beh 1 0 CASPT7 CASPT6 CASPT5 CASPT4 CASPT3 CASPT2 CASPT1 CASPT0 Mnemonic: CASPT The clock period of guard-time timer is 0.8582Ms. The default alert tone present time is 12.87Ms. CASPT7-0: The pre-set data register for counting CAS tone present time. When CAS tone is detected (ALGR low to high), the guard timer starts to up-count from 00H. As the guard timer is equal to the value of CASPT, the exist of the CAS tone is accepted. ALGR changes to low state to stop and reset the counter. CAS TONE ABSENT TIME REGISTER Bit: 7 6 5 4 (initial=0FH) 3 2 Address: BFh 1 0 CASAT7 CASAT6 CASAT5 CASAT4 CASAT3 CASAT2 CASAT1 CASAT0 Mnemonic: CASAT The clock period of guard-time timer is 0.8582Ms. The default alert tone absent time is 12.87Ms. CASAT7-0: The pre-set data register for counting CAS tone absent time. When CAS tone is absent (ALGR high to low), the guard timer starts to up-count from 00H. As the guard timer is equal to the value of CASAT, the finish of CAS tone is recognized. ALGR changes to high state to stop and reset the counter. SERIAL PORT CONTROL Bit: 7 SF1 6 LCDON 5 REGON 4 REN1 3 SFQ (initial=00H) 2 SEDG 1 CLKIO 0 SIO Mnemonic: SCON1 Address: C0h SF1: Serial port interrupt flag. When 8-bits data transited completely, SF1 is set by hardware. SF1 is cleared when serial interrupt routine is executed or cleared by software. LCDON: LCD waveform enable control. 0 to Disable LCD display, 1 to Enable LCD display. REGON: Regulator on/off control. 0 to disable regulator, 1 to regulator. REN1: Set REN1 from 0 to 1 to start the serial port1 to receive 8-bit serial data. SFQ: SFQ=0 Serial clock output frequency is equal to fOSC /2 SFQ=1 Serial clock output frequency is equal to fOSC /256 SEDG: SEDG=0 Serial data latched at falling edge of clock, SCLK=Low initially. SEDG=1 Serial data latched at rising edge of clock, SCLK=High initially. CLKIO: CLKIO=0 P4.0(SCLK) work as output mode CLKIO=1 P4.0(SCLK) work as input mode SIO: SIO=0 P4.0 & P4.1 work as normal I/O pin SIO=1 P4.0 & P4.1 work as Serial port1 function - 26 - W925E/C625 SERIAL DATA BUFFER 1 Bit: 7 6 5 4 3 (initial=00H) Read Only 2 1 0 SBUF1.7 SBUF1.6 SBUF1.5 SBUF1.4 SBUF1.3 SBUF1.2 SBUF1.1 SBUF1.0 Mnemonic: SBUF1 Address: C1h SBUF1.7-0: Serial data on the serial port 1 is read from or written to this location. It actually consists of two separate internal 8-bit registers. One is the receive register, and the other is the transmit buffer. Any read access gets data from the receive data buffer, while write access is to the transmit data buffer. REGULATOR VOLTAGE CONTROL REGISTER Bit: 7 6 5 4 3 (initial=00H) 2 1 0 REGVC.3 REGVC.2 REGVC.1 REGVC.0 Address: C2h Mnemonic: REGVC REGVC.3-0: 4 bits to tune the regulator output voltage. POWER MANAGEMENT REGISTER Bit: 7 XT/ RG 6 RGMD 5 RGSL 4 X2OFF 3 X1OFF (initial=81H) 2 - 1 - 0 - Mnemonic: PMR Address: C4h XT/ RG :Crystal/RC Oscillator Select. Setting this bit selects crystal or external clock as system clock source. Clearing this bit selects the on-chip RC oscillator as clock source. X1UP (STATUS.4) must be set to 1 and X1OFF (PMR.3) must be cleared before this bit can be set. Attempts to set this bit without obeying these conditions will be ignored. RGMD: RC Mode Status. This bit indicates the current clock source of micro-controller. When cleared, CPU is operating from the external crystal or oscillator. When set, CPU is operating from the on-chip RC oscillator. RGSL: RC Oscillator Select. This bit selects the clock source following a resume from Power Down Mode. Setting this bit allows device operating from RC oscillator when a resume from Power Down Mode. When this bit is cleared, the device will hold operation until the crystal oscillator has warmed-up following a resume from Power Down Mode. X2OFF: Set to disable sub-oscillator (32KHz oscillator) X1OFF: Crystal Oscillator Disable. Setting this bit disables the external crystal oscillator. This bit can only be set to 1 while the micro-controller is operating from the RC oscillator. Clearing this bit restarts the crystal oscillator, the X1UP (STATUS.4) bit will be set after crystal oscillator warmed-up has completed. Note: The bit0 of this SFR must be set to 1. - 27 - Publication Release Date: July 4, 2005 Revision A10 W925E/C625 STATUS REGISTER Bit: 7 X2UP 6 HIP 5 LIP 4 X1UP 3 (initial=00H) 2 - 1 - 0 - Mnemonic: STATUS Address: C5h X2UP:Sub-crystal oscillator warm-up status. When set, this bit indicates the crystal oscillator has completed the warm-up delay. When X2OFF bit is set, hardware will clear this bit. There are two options which are selected by option code for warm-up delay, one is 1024 clocks warm-up delay, other is 65536 clocks warm-up delay. HIP: High Priority Interrupt Status. When set, it indicates that software is servicing a high priority interrupt. This bit will be cleared when the program executes the corresponding RETI instruction. LIP: Low Priority Interrupt Status. When set, it indicates that software is servicing a low priority interrupt. This bit will be cleared when the program executes the corresponding RETI instruction. X1UP:Crystal Oscillator Warm-up Status. When set, this bit indicates the crystal oscillator has completed the 65536 clocks warm-up delay. Each time the crystal oscillator is restarted by exit from power down mode or the X1OFF bit is set, hardware will clear this bit. This bit is set to 1 after a power-on reset. When this bit is cleared, it prevents software from setting the XT/ RG bit to enable CPU operation from crystal oscillator. There are two options which is selected by option code for warm-up delay, one is 4096 clocks warm-up delay, other is 65536 clocks warmup delay. ※Please insert at least 10 instructions NOP after X2UP = ”1”, then switch Fsys = Fs (CKCON1.0 = “1”, M/S) & disable X1 OSC (PMR.3 = “1”, X1OFF). FSK TRANSIMT CONTROL REGISTER Bit: 7 FTE Mnemonic: FSKTC FTE: FSK transmit Enable; Enable:1, Disable=0 FTM: FSK signal Standard; Bellcore:1, V.23=0 FDS: FSK data sending status LO0, LO1: FSK transmit level option FSK output level 150Mv 120Mv 95Mv 75Mv LO1 0 0 1 1 LO0 0 1 0 1 6 FTM 5 FDS 4 3 2 (initial=00H) 1 LO1 0 LO0 Address: C6h - 28 - W925E/C625 FSK TRANSMIT DATA BUFFER Bit: 7 6 5 4 3 2 (initial=00H) 1 0 FSKTB.7 FSKTB.6 FSKTB.5 FSKTB.4 FSKTB.3 FSKTB.2 FSKTB.1 FSKTB.0 Mnemonic: FSKTB FSKTB.0: Only This bit will be latched and send out as FSK signal DIVIDER CONTROL Bit: 7 Mnemonic: DIVC 6 5 4 3 (initial=01H) 2 Address: C8h 1 0 DIVA Address: C7h DIVA: Divider available control bit. This bit is set or cleared by software to enable/disable divider. DIVA=1 to enable the divider. DIVA=0 to disable the divider. DIVA is reset after reset. PROGRAM STATUS WORD Bit: 7 CY Mnemonic: PSW CY: AC: F0: 6 AC 5 F0 4 RS1 3 RS0 (initial=00H) 2 OV Address: D0h 1 F1 0 P Carry flag. Set for an arithmetic operation, which results in a carry being generated from the ALU. It is also used as the accumulator for the bit operations. Auxiliary carry. Set when the previous operation resulted in a carry from the high order nibble. User flag 0. General purpose flag that can be set or cleared by the user. RS1 RS0 REGISTER BANK ADDRESS RS.1-0: Register bank select bits: 0 0 1 1 OV: F1: P: 0 1 0 1 0 1 2 3 00-07h 08-0Fh 10-17h 18-1Fh Overflow flag. Set when a carry was generated from the seventh bit but not from the 8th bit as a result of the previous operation, or vice-versa. User Flag 1. General purpose flag that can be set or cleared by the user by software. Parity flag. Set/cleared by hardware to indicate odd/even number of 1’s in the accumulator. - 29 - Publication Release Date: July 4, 2005 Revision A10 W925E/C625 WATCHDOG CONTROL Bit: 7 Mnemonic: WDCON 6 POR 5 4 WFS 3 WDIF (initial: note) 2 WTRF 1 EWT 0 RWT Address: D8h POR: Power-on reset flag. Hardware will set this flag when system is powered on and this flag is cleared only by software. WFS: Watchdog Timer Frequency Select. Set to select FS as WDT clock input. Clear to select FOSC as WDT clock input. WDIF: Watchdog Timer Interrupt flag. This bit is set whenever the time-out occurs in the watchdog timer. If the Watchdog interrupt is enabled (EIE.5), then an interrupt will occur (if the global interrupt enable is set and other interrupt requirements are met). Software or any reset can clear this bit. WTRF: Watchdog Timer Reset Flag. Hardware will set this bit when the watchdog timer causes a reset. Software can read it but must clear it manually. A power-fail reset will also clear the bit. This bit helps software in determining the cause of a reset. If EWT = 0, the watchdog timer will have no effect on this bit. EWT: Enable Watchdog timer Reset. Setting this bit will enable the Watchdog timer Reset function. RWT: Reset Watchdog Timer. This bit helps in putting the watchdog timer into a known state. It also helps in resetting the watchdog timer before a time-out occurs. Failing to set the EWT before time-out will cause an interrupt, if EWDI (EIE.5) is set, and 512 clocks after that a watchdog timer reset will be generated if EWT is set. This bit is self-clearing by hardware. Note: The WDCON SFR is set to a 0x000xx0b on an external reset. WTRF is set to a 1 on a Watchdog timer reset, but to a 0 on power on/down resets. WTRF is not altered by an external reset. POR is set to 1 by a power-on reset. EWT is set to 0 on a Power-on reset and unaffected by other resets. ACCUMULATOR Bit: 7 ACC.7 Mnemonic: ACC ACC.7-0: The ACC register. EXTENDED INTERRUPT ENABLE Bit: 7 Mnemonic: EIE EIE.7-6:Reserved bits. EWDI: Enable Watchdog timer interrupt. ECOMP: Enable comparator interrupt. EDIV: Enable Divider interrupt. ECID: Enable CID interrupt. - 30 6 5 EWDI 4 ECOMP 3 EDIV 6 ACC.6 5 ACC.5 4 ACC.4 3 ACC.3 (initial=00H) 2 ACC.2 1 ACC.1 0 ACC.0 Address: E0h (initial=00H) 2 ECID 1 EX3 0 EX2 Address: E8h W925E/C625 EX3: Enable External Interrupt 3. EX2: Enable External Interrupt 2. B REGISTER Bit: 7 B.7 Mnemonic: B B.7-0:The B register serves as a second accumulator. EXTENDED INTERRUPT PRIORITY Bit: 7 Mnemonic: EIP PCOMP: Comparator interrupt priority. 0 = Low priority, 1 = High priority. PDIV: Divider Interrupt Priority. 0 = Low priority, 1 = High priority. PCID: CID Interrupt Priority. 0 = Low priority, 1 = High priority. PX3: PX2: External Interrupt 3 Priority. 0 = Low priority, 1 = High priority. External Interrupt 2 Priority. 0 = Low priority, 1 = High priority. (initial=00H) 7 BIT7 Mnemonic: CIDGD CID GAIN CONTROL ADDRESS Bit: 7 Mnemonic: CIDGA CIDGA.3: 6 5 4 3 BIT3 6 BIT6 5 BIT5 4 BIT4 3 BIT3 2 BIT2 1 BIT1 0 BIT0 6 5 PWDI 4 PCOMP 3 PDIV (initial=00H) 2 PCID 1 PX3 0 PX2 6 B.6 5 B.5 4 B.4 3 B.3 (initial=00H) 2 B.2 1 B.1 0 B.0 Address: F0h Address: F8h PWDI: Watchdog timer interrupt priority. 0 = Low priority, 1 = High priority. CID GAIN CONTROL DATA Bit: Address: F9h (initial=00H) 2 BIT2 1 BIT1 0 BIT0 CIDGD.7-0: The data value of programmable CID input filter gain and hysteresis. Address: Fah The CIDGD latch control signal. Rising high pulse to latch CIDGD into CID gain control register. CIDGA.2-0: The address to indicate CID input gain control registers. - 31 - Publication Release Date: July 4, 2005 Revision A10 W925E/C625 6.3 Initial State of Registers SFR ITEM RESET INITIAL VALUE POR WDT RESET The following table lists the initial state of registers after different reset functions. ACC, B, STATUS, PSW, SP, P0, P1, P2, P3, P4, P0IO, P1IO, P2IO, P3IO, P4IO DPL, DPH, DPL1, DPH1, DPS PCON, TCON, TMOD, TL0, TL1, TH0, TH1, CKCON1, CKCON2, SCON1, SBUF1, REGVC, EXIF, IE, HB, IP, EIE, EIP P1SR, P1EF, P1H, P2H, P3H, P4H, CIDR, CIDFG, CIDPCR, CIDGD, CIDGA, FSKDR, DTMFDR, DTMFPT, DTMFAT, DTMFG, COMPR, IRC1, IRC2, FSKTC, FSKTB, CASPT, CASAT, PMR DIVC, WDCON x: Un-used u: unchanged *: Depend on circuit detection 00h 07h ffh 00h 00h 00h 00h 00h 00h 00h ******** B 19h 00h 0fh 10000xx1B 01h 0u000uu0B 00h 07h ffh 00h 00h 00h 00h 00h 00h 00h ******** B 19h 00h 0fh 01h 00h 07h ffh 00h 00h 00h 00h 00h 00h 00h ******** B 19h 00h 0fh 01h 10000xx1B uuu00xx1B 01000000B 0u0001u0B - 32 - W925E/C625 6.4 Instruction The W925E/C625 executes all the instructions of the standard 8032 family. However, timing of these instructions is different. In the W925E/C625, each machine cycle consists of 4 clock periods, while in the standard 8032 it consists of 12 clock periods. Also, in the W925E/C625 there is only one fetch per machine cycle i.e. 4 clocks per fetch, while in the standard 8032 there can be two fetches per machine cycle, which works out to 6 clocks per fetch. Table 2 Instructions that affect Flag settings INSTRUCTION CARRY OVERFLOW AUXILIARY CARRY INSTRUCTION CARRY OVERFLOW AUXILIARY CARRY INC,DEC ADD ADDC SUBB MUL DIV DA A RRC A RLC A X X X 0 0 X X X X X X X X X X X SETB C CLR C CPL C ANL C, bit ANL C, bit ORL C, bit ORL C, bit MOV C, bit CJNE 1 0 X X X X X X X A “X” indicates that the modification is as per the result of instruction. A “-“ indicates that the flag is not effected by the instruction. Table 3 Instruction Timing for W925E/C625 INSTRUCTION NOP ADD A, R0 ADD A, R1 ADD A, R2 ADD A, R3 ADD A, R4 ADD A, R5 ADD A, R6 ADD A, R7 ADD A, @R0 ADD A, @R1 ADD A, direct ADD A, #data ADDC A, R0 ADDC A, R1 ADDC A, R2 ADDC A, R3 HEX OP-CODE 00 28 29 2A 2B 2C 2D 2E 2F 26 27 25 24 38 39 3A 3B BYTES 1 1 1 1 1 1 1 1 1 1 1 2 2 1 1 1 1 MACHINE CYCLES 1 1 1 1 1 1 1 1 1 1 1 2 2 1 1 1 1 INSTRUCTION ANL A, R0 ANL A, R1 ANL A, R2 ANL A, R3 ANL A, R4 ANL A, R5 ANL A, R6 ANL A, R7 ANL A, @R0 ANL A, @R1 ANL A, direct ANL A, #data ANL direct, A ANL direct, #data ANL C, bit ANL C, /bit CJNE A, direct, rel HEX OP-CODE 58 59 5A 5B 5C 5D 5E 5F 56 57 55 54 52 53 82 B0 B5 BYTES 1 1 1 1 1 1 1 1 1 1 2 2 2 3 2 2 3 MACHINE CYCLES 1 1 1 1 1 1 1 1 1 1 2 2 2 3 2 2 4 - 33 - Publication Release Date: July 4, 2005 Revision A10 W925E/C625 Table 3. Instruction Timing for W925E/C625, continued INSTRUCTION ADDC A, R4 ADDC A, R5 ADDC A, R6 ADDC A, R7 ADDC A, @R0 ADDC A, @R1 ADDC A, direct ADDC A, #data ACALL addr11 HEX OP-CODE 3C 3D 3E 3F 36 37 35 34 71,91,B1, 11,31,51, D1,F1 01,21,41, 61,81,A1, C1,E1 BF E4 F4 C3 C2 B3 B2 14 18 19 1A 1B 1C 1D 1E 1F 16 17 15 A5 84 D4 D8 D9 DA DB DC BYTES 1 1 1 1 1 1 2 2 2 MACHINE CYCLES 1 1 1 1 1 1 2 2 3 INSTRUCTION CJNE A, #data, rel CJNE @R0, #data, rel CJNE @R1, #data, rel CJNE R0, #data, rel CJNE R1, #data, rel CJNE R2, #data, rel CJNE R3, #data, rel CJNE R4, #data, rel CJNE R5, #data, rel HEX OP-CODE B4 B6 B7 B8 B9 BA BB BC BD BYTES 3 3 3 3 3 3 3 3 3 MACHINE CYCLES 4 4 4 4 4 4 4 4 4 AJMP ADDR11 CJNE R7, #data, rel CLR A CPL A CLR C CLR bit CPL C CPL bit DEC A DEC R0 DEC R1 DEC R2 DEC R3 DEC R4 DEC R5 DEC R6 DEC R7 DEC @R0 DEC @R1 DEC direct DEC DPTR DIV AB DA A DJNZ R0, rel DJNZ R1, rel DJNZ R2, rel DJNZ R3, rel DJNZ R4, rel 2 3 1 1 1 2 1 2 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 2 2 2 2 2 3 4 1 1 1 2 1 2 1 1 1 1 1 1 1 1 1 1 1 2 2 5 1 3 3 3 3 3 CJNE R6, #data, rel JC rel JNC rel JB bit, rel JNB bit, rel JBC bit, rel LCALL addr16 LJMP addr16 MUL AB MOV A, R0 MOV A, R1 MOV A, R2 MOV A, R3 MOV A, R4 MOV A, R5 MOV A, R6 MOV A, R7 MOV A, @R0 MOV A, @R1 MOV A, direct MOV A, #data MOV R0, A MOV R1, A MOV R2, A MOV R3, A MOV R4, A MOV R5, A MOV R6, A BE 40 50 20 30 10 12 02 A4 E8 E9 EA EB EC ED EE EF E6 E7 E5 74 F8 F9 FA FB FC FD FE 3 2 2 3 3 3 3 3 1 1 1 1 1 1 1 1 1 1 1 2 2 1 1 1 1 1 1 1 4 3 3 4 4 4 4 4 5 1 1 1 1 1 1 1 1 1 1 2 2 1 1 1 1 1 1 1 - 34 - W925E/C625 Table 3. Instruction Timing for W925E/C625, continued INSTRUCTION DJNZ R5, rel DJNZ R6, rel DJNZ R7, rel DJNZ direct, rel INC A INC R0 INC R1 INC R2 INC R3 INC R4 INC R5 INC R6 INC R7 INC @R0 INC @R1 INC direct INC DPTR JMP @A+DPTR JZ rel JNZ rel MOV @R1, direct MOV @R0, #data MOV @R1, #data MOV direct, A MOV direct, R0 MOV direct, R1 MOV direct, R2 MOV direct, R3 MOV direct, R4 MOV direct, R5 MOV direct, R6 MOV direct, R7 MOV direct, @R0 MOV direct, @R1 MOV direct, direct MOV direct, #data MOV DPTR, #data 16 The CPE designer may choose to set The CPE designer may choose to set HEX OP-CODE DD DE DF D5 04 08 09 0A 0B 0C 0D 0E 0F 06 07 05 A3 73 60 70 A7 76 77 F5 88 89 8A 8B 8C 8D 8E 8F 86 87 85 75 90 93 83 BYTES 2 2 2 3 1 1 1 1 1 1 1 1 1 1 1 2 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 3 1 1 MACHINE CYCLES 3 3 3 4 1 1 1 1 1 1 1 1 1 1 1 2 2 2 3 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 3 2 2 INSTRUCTION MOV R7, A MOV R0, direct MOV R1, direct MOV R2, direct MOV R3, direct MOV R4, direct MOV R5, direct MOV R6, direct MOV R7, direct MOV R0, #data MOV R1, #data MOV R2, #data MOV R3, #data MOV R4, #data MOV R5, #data MOV R6, #data MOV R7, #data MOV @R0, A MOV @R1, A MOV @R0, direct RL A RLC A RR A RRC A SETB C SETB bit SWAP A SJMP rel SUBB A, R0 SUBB A, R1 SUBB A, R2 SUBB A, R3 SUBB A, R4 SUBB A, R5 SUBB A, R6 SUBB A, R7 SUBB A, @R0 SUBB A, @R1 SUBB A, direct HEX OP-CODE FF A8 A9 AA AB AC AD AE AF 78 79 7A 7B 7C 7D 7E 7F F6 F7 A6 23 33 03 13 D3 D2 C4 80 98 99 9A 9B 9C 9D 9E 9F 96 97 95 BYTES 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 1 2 1 1 1 1 1 2 1 2 1 1 1 1 1 1 1 1 1 1 2 MACHINE CYCLES 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 1 2 1 1 1 1 1 2 1 3 1 1 1 1 1 1 1 1 1 1 2 - 35 - Publication Release Date: July 4, 2005 Revision A10 W925E/C625 Table 3. Instruction Timing for W925E/C625, continued INSTRUCTION MOVX A, @R0 MOVX A, @R1 MOVX A, @DPTR MOVX @R0, A MOVX @R1, A MOVX @DPTR, A MOV C, bit MOV bit, C ORL A, R0 ORL A, R1 ORL A, R2 ORL A, R3 ORL A, R4 ORL A, R5 ORL A, R6 ORL A, R7 ORL A, @R0 ORL A, @R1 ORL A, direct ORL A, #data ORL direct, A ORL direct, #data ORL C, bit ORL C, /bit PUSH direct POP direct RET RETI HEX OP-CODE E2 E3 E0 F2 F3 F0 A2 92 48 49 4A 4B 4C 4D 4E 4F 46 47 45 44 42 43 72 A0 C0 D0 22 32 BYTES 1 1 1 1 1 1 2 2 1 1 1 1 1 1 1 1 1 1 2 2 2 3 2 2 2 2 1 1 MACHINE CYCLES 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 2 2 2 3 2 2 2 2 2 2 INSTRUCTION SUBB A, #data XCH A, R0 XCH A, R1 XCH A, R2 XCH A, R3 XCH A, R4 XCH A, R5 XCH A, R6 XCH A, R7 XCH A, @R0 XCH A, @R1 XCHD A, @R0 XCHD A, @R1 XCH A, direct XRL A, R0 XRL A, R1 XRL A, R2 XRL A, R3 XRL A, R4 XRL A, R5 XRL A, R6 XRL A, R7 XRL A, @R0 XRL A, @R1 XRL A, direct XRL A, #data XRL direct, A XRL direct, #data HEX OP-CODE 94 C8 C9 CA CB CC CD CE CF C6 C7 D6 D7 C5 68 69 6A 6B 6C 6D 6E 6F 66 67 65 64 62 63 BYTES 2 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 2 2 2 3 MACHINE CYCLES 2 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 2 2 2 3 - 36 - W925E/C625 6.5 Power Management The W925E/C625 has 3 operation mode, normal mode, idle mode and power down mode to manage the power consumption. Normal Mode Normal mode is used in the normal operation status. All functions can be worked in the normal mode. Idle Mode The user can put the device into idle mode by writing 1 to the bit PCON.0. The instruction that sets the idle bit is the last instruction that will be executed before the device goes into Idle Mode. In the Idle mode, the clock to the CPU is halted, but not to the Interrupt, Timer, Watchdog timer, Divider, Comparator and CID blocks. This forces the CPU state to be frozen; the Program counter, the Stack Pointer, the Program Status Word, the Accumulator and the other registers hold their contents. The port pins hold the logical states they had at the time Idle was activated. The Idle mode can be terminated in two ways. Since the interrupt controller is still active, the activation of any enabled interrupt can wake up the processor. This will automatically terminate the Idle mode and clear the Idle bit. And if bit IDLT(PCON.4) is cleared the Interrupt Service Routine(ISR) will be executed, else the idle mode is released directly without any execution of ISR. After the ISR, execution of the program will continue from the instruction, which put the device into Idle mode. The Idle mode can also be exited by activating the reset. The device can be put into reset either by applying a low on the external RESET pin or a power on/fail reset condition or a Watchdog timer reset. The external reset pin has to be held low for at least two machine cycles i.e. 8 clock periods to be recognized as a valid reset. In the reset condition the program counter is reset to 0000h and all the SFRs are set to the reset condition. Since the clock is still running in the period of external reset therefore the instruction is executed immediately. In the Idle mode, the Watchdog timer continues to run, and if enabled, a time-out will cause a watchdog timer interrupt which will wake up the device. The software must reset the Watchdog timer in order to preempt the reset which will occur after 512 clock periods of the time-out. Power Down Mode The device can be put into Power Down mode by writing 1 to bit PCON.1. The instruction that does this will be the last instruction to be executed before the device goes into Power Down mode. In the Power Down mode, all the clocks are stopped and the device comes to a halt. All activity is completely stopped and the power consumption is reduced to the lowest possible value. The port pins output the values held by their respective SFRs. The W925E/C625 will exit the Power Down mode by reset or external interrupts or ring detected. An external reset can be used to exit the Power down state. The low on RESET pin terminates the Power Down mode, and restarts the clock. The on-chip hardware will now provide a delay of 65536 clock, which is used to provide time for the oscillator to restart and stabilize. Once this delay is complete, an internal reset is activated and the program execution will restart from 0000h. In the Power down mode, the clock is stopped, so the Watchdog timer cannot be used to provide the reset to exit Power down mode. The W925E/C625 can be woken from the Power Down mode by forcing an external interrupt pin activated and ring detected, provided the corresponding interrupt is enabled, while the global enable(EA) bit is set. While the power down is released, the device will experience a warm-up delay of 65536 clock cycles to ensure the stabilization of oscillation. Then device executes the interrupt service routine for the corresponding external interrupt or CID interrupt. After the interrupt service routine is completed, the program returns to the instruction after the one, which put the device into Power Down Publication Release Date: July 4, 2005 Revision A10 - 37 - W925E/C625 mode and continues from there. When RGSL(PMR.5) bit is set to 1, the CPU will use the internal RC oscillator instead of crystal to exit Power Down mode. The micro-controller will automatically switch from RC oscillator to crystal after a warm-up delay of 65536 crystal clocks. The RC oscillator runs at approximately 2−4 MHz. Using RC oscillator to exit from Power Down mode saves the time for waiting crystal start-up. It is useful in the low power system which usually be awakened from a short operation then returns to Power Down mode. 6.6 Reset The user has several hardware related options for placing the W925E/C625 into reset condition. In general, most register bits go to their reset value irrespective of the reset condition, but there are few flags that initial states are dependant on the source of reset. User can recognize the cause of reset by reading the flags. There are three ways of putting the device into reset state. They are External reset, Power on reset and Watchdog reset. External Reset The device continuously samples the RESET pin at state C4 of every machine cycle. Therefore, the RESET pin must be held for at least 2 machine cycles to ensure detection of a valid RESET low. The reset circuitry then synchronously applies the internal reset signal. Thus, the reset is a synchronous operation and requires the clock to be running to cause an external reset. Once the device is in reset condition, it will remain so as long as RESET is 0. Even after RESET is deactivated, the device will continue to be in reset state for up to two machine cycles, and then begin program execution from 0000h. There is no flag associated with the external reset condition. However, since some flags indicate the cause of other two reset, the external reset can be considered as the default reset if those two flags are cleared. Watchdog Timer Reset The Watchdog timer is a free running timer with programmable time-out intervals. The user can reset the watchdog timer at any time to avoid producing the flag WDIF. If the Watchdog reset is enabled and the flag WDIF is set high, the watchdog timer reset is performed after the additional 512 clocks come. This places the device into the reset condition. The reset condition is maintained by hardware for two machine cycles. Once the reset is removed the device will begin execution from 0000h. 6.7 Interrupt The W925E/C625 has a two priority levels interrupt structure with 11 interrupt sources. Each of the interrupt sources has an individual priority bit, flag, interrupt vector and enable bit. In addition, the interrupts can be globally enabled or disabled. Interrupt Sources The External Interrupts INT0 and INT1 can be either edge triggered or level triggered, depending on bits IT0 and IT1. The bits IE0 and IE1 in the TCON register are the flags which are checked to generate the interrupt. In the edge triggered mode of the INT0 and the INT1 inputs are sampled in every machine cycle. If the sample is high in one cycle and low in the next, then a high to low transition is detected and the interrupts request flag Iex in TCON is set. The flag bit requests the interrupt. Since the external interrupts are sampled every machine cycle, they have to be held high or low for at least one complete machine cycle. The Iex flag is automatically cleared when the service routine is called. If the level triggered mode is selected, then the requesting source has to hold the pin low until the interrupt is serviced. The Iex flag will not be cleared by the hardware on entering the - 38 - W925E/C625 service routine. If the interrupt continues to be held low even after the service routine is completed, then the processor may acknowledge another interrupt request from the same source. Note that the external interrupts INT2 to INT3 are edge triggered only. The TF0, TF1 flags generate the Timer 0, 1 Interrupts. These flags are set by the overflow in the Timer 0, Timer 1. The TF0 and TF1 flags are automatically cleared by the hardware when the timer interrupt is serviced. The Watchdog timer can be used as a system monitor or a simple timer. In either case, when the timeout count is reached, the Watchdog timer interrupt flag WDIF (WDCON.3) is set. If the enable bit EIE.5 enables the interrupt, then an interrupt will occur. The Serial block can generate interrupts on reception or transmission. There are one interrupt sources from the Serial block, which are obtained by SF1 in the SCON1. SF1 is cleared automatically when the serial port interrupt is serviced. The divider interrupt is generated by DIVF that is set when divider overflows. DIVF is set by hardware and cleared when divider interrupt is serviced. The divider interrupt is enable/disable if the bit EDIV is high/low. The comparator interrupt is produced by COMPF, which is set when the RESC bit is changed from low to high. RESC, which is the real-time result of comparator, set when the voltage of reference input is higher than the voltage of analog input. The CID interrupt is generated by CIDF. The CIDF is a logic OR output of all CID flags which are set by hardware and cleared by software. The structure of the CID flags is shown in Figure 6-4. Each of the individual interrupts can be enabled or disabled by setting or clearing the corresponding bits in the IE and EIE SFR. A bit EA, which is located in IE.7, is a global control bit to enable/disable the all interrupt. When bit EA is zero all interrupts are disable and when bit EA is high each interrupt is enable individually by the corresponding bit. RNGF FDRF ALGOF DTMFDF FSF CIDF D System clock Clear by software R Figure 6-4 The Structure of CID Flags Priority Level Structure There are two priority levels for the interrupts, high and low. The interrupt sources can be individually set to either high or low levels. Naturally, a higher priority interrupt cannot be interrupted by a lower priority interrupt. However there exists a pre-defined hierarchy amongst the interrupts themselves. This hierarchy comes into play when the interrupt controller has to resolve simultaneous requests having the same priority level. This hierarchy is defined as shown below; the interrupts are numbered starting from the highest priority to the lowest. - 39 - Publication Release Date: July 4, 2005 Revision A10 W925E/C625 Table 4 Interrupt table. INTERRUPT FLAG NAME FLAG LOCATION EN BIT EN BIT LOCATION PRIORITY FLAG INTERRUPT CLEARED BY VECTOR External interrupt 0 Timer0 overflow External interrupt 1 Timer1 overflow Serial port External interrupt 2 External interrupt 3 CID Divider overflow Compare difference Watchdog timer IE0 TF0 IE1 TF1 SF1 IE2 IE3 CIDF DIVF COMPF WDIF TCON.1 TCON.5 TCON.3 TCON.7 SCON1.7 EXIF.0 EXIF.1 EXIF.2 EXIF.3 EXIF.4 WDCON.3 EX0 ET0 EX1 ET1 ES1 EX2 EX3 ECID EDIV ECOMP EWDI IE.0 IE.1 IE.2 IE.3 IE.6 EIE.0 EIE.1 EIE.2 EIE.3 EIE.4 EIE.5 1 (highest) 2 3 4 5 6 7 8 9 10 11 (lowest) hardware + software hardware + software hardware + software hardware + software hardware + software hardware + software hardware + software software hardware + software hardware + software software 03h 0Bh 13h 1Bh 3Bh 43h 4Bh 53h 5Bh 63h 6Bh Ps: The flags marked as the italic font are not bit-addressable. The interrupt flags are sampled every machine cycle. In the same machine cycle, the sampled interrupts are polled and their priority is resolved. If certain conditions are met then the hardware will execute an internally generated LCALL instruction which will vector the process to the appropriate interrupt vector address. The conditions for generating the LCALL are 1. An interrupt of equal or higher priority is not currently being serviced. 2. The current polling cycle is the last machine cycle of the instruction currently being executed. 3. The current instruction does not involve a write to IP, IE, EIP or EIE registers and is not a RETI. If any of these conditions is not met, then the LCALL will not be generated. The polling cycle is repeated every machine cycle, with the interrupts being sampled in the same machine cycle. If an interrupt flag is active in one cycle but not responded to, and is not active when the above conditions are met, the denied interrupt will not be serviced. This means that active interrupts are not remembered. Note that every polling cycle is new. Execution continues from the vectored address until an RETI instruction is executed. On execution of the RETI instruction, the processor pops out the top content of Stack to the PC. The processor is not notified anything if the content of stack was changed. Note that a RET instruction would perform exactly the same process as a RETI instruction, but it would not inform the Interrupt Controller that the interrupt service routine is completed, and would leave the controller still thinking that the service routine is underway. - 40 - W925E/C625 6.8 Programmable Timers/Counters The W925E/C625 has 2 16-bit timer/counters. There are two 8-bit registers to perform a 16-bit counting register in every timer/counter. In timer/counter 0, TH0 is the upper 8 bits register and TL0 is the lower 8 bits register. Similarly timer/counter 1 have two 8-bit registers, TH1 and TL1. Each timer/counter has 4 kind of clock sources which are Fosc/4, Fosc/64, Fosc/1024 and Fs. There are 3 operating modes in each timer/counter 0 and 1. The operating modes of timer/ counter0 is identical to timer/counter1. The overflow signal of each timer/counter is sampled at phase 2 in every system machine cycle, therefore when the system clock and the timer/counter clock both are from suboscillator, if the overflow frequency is higher than Fs/4 the overflow flag can not be sampled correctly. Only one overflow flag can be sampled in a machine cycle others will be missed. MODE 0 In Mode 0, the timer/counters act as 13-bit timer/counters. The 13 bits consist of 8 bits of THx and lower 5 bits of TLx. The upper 3 bits of TLx are ignored. The negative edge of the clock causes the content of the TLx register to increase one. When the fifth bit in TLx moves from 1 to 0, then the count in the THx register is incremented. When the count in THx moves from FFh to 00h, then the overflow flag TFx is set. The counted input is enabled only if TRx is set and either GATE=0 or INTx =1. When C/ T is set to 0, then it will count clock cycles, and if C/ T is set to 1, then it will count 1 to 0 transitions on T0 (P3.4) for timer 0 and T1 (P3.5) for timer 1. When the 13-bit count reaches 1FFFh, the next count will cause it to rollover to 0000h. The timer overflow flag TFx of the relevant timer is set and if enabled an interrupts will occur. Note that when they are used as a timer, the bits of the CKCON1 select the time-base. MODE1 Mode 1 is similar to Mode 0 except that the counting register forms a 16-bit counter, rather than a 13 bit counter. TM0=CKCON1.2, CKCON1.3 (TM1=CKCON1.4, CKCON1.5) Fosc/4 Fosc/64 Fosc/1024 Fs T0 = P3.4 (T1 = P3.5) TR0 = TCON.4 (TR1 = TCON.6) GATE = TMOD.3 (GATE = TMOD.7) INT0 = P3.2 (INT1 = P3.3) 00 01 10 11 mux C/T = TMOD.2 (C/T = TMOD.6) 0 1 0 4 TL0 (TL1) M1,M0 = TMOD.1,TMOD.0 (M1,M0 = TMOD.5,TMOD.4) 00 7 01 0 TH0 (TH1) 7 TFx TF0 (TF1) Interrupt PS: Functions of timer1 are shown in brackets Figure 6-5 Mode 0 & Mode 1 of Timer/Counter 0 & 1 - 41 - Publication Release Date: July 4, 2005 Revision A10 W925E/C625 MODE 2 Mode 2 is the Auto Reload Mode. In mode 2, TLx acts as an 8-bit count register, while THx holds the reload value. When the TLx register overflows from FFh to 00h, the TFx bit is set and TLx is reloaded with the content of THx, and the counting process continues from the reloaded TLx. The reload operation leaves the content of the THx register unchanged. Counting is controlled by the TRx bit and the proper setting of GATE and INTx pins. BUZZER In mode 2, timer 0 can be use to output an arbitrary frequency to the BUZ pin by programming bit6 and bit7 of CKCON2. BUZ pin can be configured as key tone (KT) output by setting BUZSL to high. When disable buzzer output by clearing ENBUZ to low, the BUZ output is in floating status. In the case where timer 0 clock input is FT, the desired frequency for BUZ output = FT / (255 – preset value + 1) / 2 (HZ). CKCON2.5, CKCON2.4 Low 512Hz 1024Hz 2048Hz 00 01 10 11 TM0=CKCON1.2, CKCON1.3 (TM1=CKCON1.4, CKCON1.5) Fosc/4 Fosc/64 Fosc/1024 Fs 00 01 10 11 mux CKCON2.6 CKCON2.7 =BUZSL =ENBUZ KT 1/2 From TM0 Pin BUZ floating mux C/T = TMOD.2 (C/T = TMOD.6) 0 FT 1 TL0 (TL1) T0 = P3.4 (T1 = P3.5) TR0 = TCON.4 (TR1 = TCON.6) GATE = TMOD.3 (GATE = TMOD.7) INT0 = P3.2 (INT1 = P3.3) 0 7 TFx TF0 (TF1) Interrupt 0 TH0 (TH1) 7 PS: Functions of timer1 are shown in brackets Figure 6-6 Mode 2 of Timer/Counter 0 & 1 When FT equals 32768 Hz, depending on the preset value of TM0, the BUZ pin will output a single tone signal in the tone frequency range from 64 Hz to 16384 Hz. The relation between the tone frequency and the preset value of TM0 is shown in the table below. - 42 - W925E/C625 Table 5 The relation between the tone frequency and the preset value of TM0 3rd octave Tone frequency TM0 preset value & BUZ frequency 83H 8AH 90H 97H 9DH A2H A7H ACH B1H B6H BAH BEH 131.07 138.84 146.28 156.03 165.49 174.30 184.09 195.04 207.39 221.40 234.05 248.24 4th octave Tone frequency 261.63 277.18 293.66 311.13 329.63 349.23 369.99 392.00 415.30 440.00 466.16 493.88 TM0 preset value & BUZ frequency C1H C5H C8H CBH CEH D1H D4H D6H D9H DBH DDH DF H 260.06 277.69 292.57 309.13 327.68 348.58 372.35 390.08 420.10 442.81 468.11 496.48 5th octave Tone frequency 523.25 554.37 587.33 622.25 659.26 698.46 739.99 783.99 830.61 880.00 932.23 987.77 TM0 preset value & BUZ frequency E1H E3H E4H E6H E7H E9H EAH EBH ECH EDH EEH EFH 528.51 564.96 585.14 630.15 655.36 712.34 744.72 780.19 819.20 862.84 910.22 963.76 C C# D D# E F F# G G# A A# B 130.81 138.59 146.83 155.56 164.81 174.61 185.00 196.00 207.65 220.00 233.08 246.94 T O N E Note: Central tone is DB (440 Hz). WATCHDOG TIMER The Watchdog timer is a free-running timer that can be programmed by the user to serve as a system monitor, a time-base generator or an event timer. It is a set of dividers that divides the system clock. The divider output is selectable and determines the time-out interval. In the condition of the timer-out expiring, the WDT interrupt and WDT reset may be executed if the corresponding enable control bits are set. The interrupt will occur if the individual interrupt enable and the global enable are set. The interrupt and reset functions are independent of each other and may be used separately or together depending on the users software. Fsub Fosc 1 12 WD1,WD0 WDIF EWDI(EIE.5) Interrupt WFS(WDCON.4) 13 15 00 01 10 11 Time-out WTRF 16 18 selector Reset Watchdog RWT (WDCON.0) 19 21 512 clock delay Reset Enable Watchdog timer reset EWT(WDCON.1) Figure 6-7 Watchdog Timer - 43 - Publication Release Date: July 4, 2005 Revision A10 W925E/C625 The Watchdog timer should first be restarted by using RWT. This ensures that the timer starts from a known state. The RWT bit is used to restart the watchdog timer. This bit is self clearing, i.e. after writing a 1 to this bit the software will automatically clear it. The watchdog timer will now count clock cycles. The time-out interval is selected by the two bits WD1 and WD0 (CKCON.7 and CKCON.6). When the selected time-out occurs, the Watchdog interrupt flag WDIF (WDCON.3) is set. After the time-out has occurred, the watchdog timer waits for an additional 512 clock cycles. The software must issue a RWT to reset the watchdog before the 512 clocks have elapsed. If the Watchdog Reset EWT (WDCON.1) is enabled, then 512 clocks after the time-out, if there is no RWT, a system reset due to Watchdog timer will occur. This will last for two machine cycles, and the Watchdog timer reset flag WTRF (WDCON.2) will be set. This indicates to the software that the watchdog was the cause of the reset. When used as a simple timer, the reset and interrupt functions are disabled. The timer will set the WDIF flag each time the timer completes the selected time interval. The WDIF flag is polled to detect a time-out and the RWT allows software to restart the timer. The Watchdog timer can also be used as a very long timer. The interrupt feature is enabled in this case. Every time the time-out occurs an interrupt will occur if the global interrupt enable EA is set. Table 6 Time-out values for the Watchdog timer WD1 WD0 WATCHDOG NUMBER OF INTERVAL CLOCKS 12 15 18 21 FOSC= 3.579545 MHZ FOSC= 32768 HZ RESET OF CLOCKS 0 0 1 1 0 1 0 1 2 2 2 2 4096 32786 262144 2097152 1.14 Ms 9.15 Ms 73.23 Ms 585.87 Ms 0.125 S 1S 8S 64 S 4608 33280 262656 2097664 The Watchdog timer will de disabled by a power-on/fail reset. The Watchdog timer reset does not disable the watchdog timer, but will restart it. In general, software should restart the timer to put it into a known state. The control bits that support the Watchdog timer are discussed below. WATCHDOG CONTROL WDIF: WDCON.3 – Watchdog Timer Interrupt flag. This bit is set whenever the time-out occurs in the watchdog timer. If the Watchdog interrupt is enabled (EIE.5), then an interrupt will occur (if the global interrupt enable is set and other interrupt requirements are met). Software or any reset can clear this bit. WTRF: WDCON.2 – Watchdog Timer Reset flag. This bit is set whenever a watchdog reset occurs. This bit is useful for determined the cause of a reset. Software must read it, and clear it manually. A Power-fail reset will clear this bit. If EWT = 0, then this bit will not be affected by the watchdog timer. EWT: WDCON.1 – Enable Watchdog timer Reset. This bit when set to 1 will enable the Watchdog timer reset function. Setting this bit to 0 will disable the Watchdog timer reset function, but will leave the timer running - 44 - W925E/C625 RWT: WDCON.0 – Reset Watchdog Timer. This bit is used to clear the Watchdog timer and to restart it. This bit is self-clearing, so after the software writes 1 to it the hardware will automatically clear it. If the Watchdog timer reset is enabled, then the RWT has to be set by the user within 512 clocks of the time-out. If this is not done then a Watchdog timer reset will occur. CLOCK CONTROL WD1,WD0: CKCON.7, CKCON.6 – Watchdog Timer Mode select bits. These two bits select the time-out interval for the watchdog timer. The reset time is longer 512 clocks time than the interrupt time-out value. 12 The default Watchdog time-out is 2 clocks, which is the shortest time-out period. 6.9 Serial Port 1 The P4.0 and P4.1 can be used as a 8-bit serial input/output port1. P4.0 is the serial port 1 clock I/O pin and P4.1 is the serial port 1 data I/O pin. The serial port 1 is controlled by SCON1 register which is described as below. SF1: Serial port 1 interrupt flag. When 8-bits data is transited completely, SF1 is set by hardware. SF1 is cleared when serial interrupt1 routine is executed or cleared by software. REN1: Set REN1 from 0 to 1 to start the serial port1 to receive 8-bit serial data. SFQ: SFQ= 0 Serial clock output frequency is equal to fOSC /2 SFQ= 1 Serial clock output frequency is equal to fOSC / 256 SEDG: SEDG= 0 Serial data latched at falling edge of clock, SCLK=Low initially. SEDG= 1 Serial data latched at rising edge of clock, SCLK=High initially. CLKIO: CLKIO= 0 P4.0(SCLK) work as output mode CLKIO= 1 P4.0(SCLK) work as input mode SIO: SIO= 0 P4.0 & P4.1 work as normal I/O pin SIO= 1 P4.0 & P4.1 work as Serial port1 function Any instruction causes a write to SBUF1 will start the transmission of serial port 1. As the REN1 is from 0 to 1, the serial port 1 begins to receive a byte into SBUF1 in the frequency of the serial clock. REN1 could be cleared by software after receive function begins. The LSB is transmitted/ received first. The I/O mode of serial clock pin is controlled by CLKIO. User has to take care the initial state of the serial port pins. - 45 - Publication Release Date: July 4, 2005 Revision A10 W925E/C625 C1 C2 C3 C4 REN1 SEDG=1, rising latch P4.0 P4.0 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 SEDG=0, falling latch SF1 Data Input P4.1 NOTE: The serial clock frequency is fosc/2 Figure 6-8 Timing of the Serial Port 1 Input Function C1 C2 C3 C4 Ins. P4.0 P4.0 serial out instruction SEDG=1, falling changed 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 SEDG=0, rising changed SF1 P4.1 Data output NOTE: The serial clock frequency is fosc/2 Figure 6-9 Timing of the Serial Port 1 Output Function - 46 - W925E/C625 6.10 Comparator A built-in comparator to compare the analog signal. There is a analog input paths from pin VNEG. Two reference inputs, one is from pin VPOS and other is from regulator output. When the voltage of positive input is higher than the negative input, the comparator output will be high. The RESEC(COMPR.3) is the result of the comparison. An internal rising signal on RESC produces interrupt flag of COMPF (EXIF.4). The flag COMPF is cleared when comparator interrupt routine is executed or cleared by software. Set COMPEN to enable the comparator function. VNEG(P4.2) D VPOS(P4.4) REF1 REF X.XV REGULATOR EN C3 RESET RESC Clr D CK COMPF=0 CK Clr EXIF.4 (COMPF) COMPEN SCON1.5(REGON) Figure 6-10 The Configuration of Comparator 6.11 DTMF Generator W925E/C625 provides a DTMF generator which outputs the dual tone multi-frequency signal to the DTMF pin. The DTMF generator can work well at the operating frequency of 3.58MHz. A DTMF generator register DTMFG controls the DTMF output and specifies the desired low/high frequency. The tones are divided into two groups (low group and high group). When the generator is disable, the DTMF pin is in tri-state. The relation between the DTMF signal and the corresponding touch tone keypad is shown in Figure 6-11. Row/Col R1 R2 R3 R4 C1 C2 C3 C4 Frequency 697 Hz 770 Hz 852 Hz 941 Hz 1209 Hz 1336 Hz 1477 Hz 1633 Hz C1 R1 R2 R3 R4 1 4 7 * C2 2 5 8 0 C3 3 6 9 # C4 A B C D Figure 6-11 The Relation Between DTMF and Keypad - 47 - Publication Release Date: July 4, 2005 Revision A10 W925E/C625 Bit: 7 - 6 DTGE 5 HE 4 LE 3 L1 2 L0 Address: Bah 1 H1 0 H0 Mnemonic: DTMFGR L1 L0 H1 H0 SELECTED TONE x x x x 0 0 1 1 x x x x 0 1 0 1 0 0 1 1 x x x x 0 1 0 1 x x x x 1209Hz 1336Hz 1477Hz 1633Hz 697Hz 770Hz 852Hz 941Hz LE: Enable low group frequency output. HE: Enable high group frequency output. DTGE: Enable dual tone output to DTMF pin. 6.12 FSK Generator W925E/C625 provides a FSK generator which outputs the FSK signal to the DTMF pin. The FSK output share with DTMF output pin. It can out FSK signal with 1200Hz baud rate of ITU-T V.23 or Bellcore 202 signal. A FSK transmit data register (FSKTB) specifies the desired output data. The FSK Transmit Control Register (FSKTC) can control whether the FSK signal will be output or not. The relation timing is shown in Figure 6-12. Enable signal (FTE) Latch clock [FSF] Data latch Flag (FDS) Data (FSKTB) bit0 FSK Signal (DTMF pin) Auto clear Interrupt occur when rising edge 1 Hi-Z 1 833us 0 1 1 0 0 Hi-Z 0 1 1 0 Figure 6-12 FSK Modulator - 48 - W925E/C625 FSK TRANSIMT CONTROL REGISTER Bit: 7 FTE Mnemonic: FSKTC FTE: FTM: FDS: FSK transmit Enable. Enable=1, Disable=0 FSK signal Standard. Bellcore 202=1, V.23=0 FSK data sending status FSK output level 150Mv 120Mv 95Mv 75Mv FSK TRANSMIT DATA BUFFER Bit: 7 6 5 4 3 LO1 0 0 1 1 LO0 0 1 0 1 (initial=00H) 2 Address: C7h 1 0 6 FTM 5 FDS 4 3 (initial=00H) 2 Address: C6h 1 LO1 0 LO0 LO0, LO1: FSK transmit level option FSKTB.7 FSKTB.6 FSKTB.5 FSKTB.4 FSKTB.3 FSKTB.2 FSKTB.1 FSKTB.0 Mnemonic: FSKTB FSKTB.0: Only This bit will be latched and send out as FSK signal When FTE enable will set the FDS to high to enable the internal latch clock in 1200Hz. When FDS is in high state, FSKTB bit0 will be sent out by FSK modulator at the rising edge of latch clock. FDS could be cleared by software to inform no more data will be sent out after the last bit is sent completely. If the FDS is cleared then FTE will become low at next rising latch clock to disable FSK modulator and clear FDS by hardware automatically. When FTE is set, FSK modulation flag (FSF) will be set at every rising edge of latch clock to produce an interrupt shared with CID interrupt routine. If a CID interrupt occurs, user can check FSF to know if this interrupt is caused by FSK modulator. The only way to stop FSK signal immediately is to disable FTE by software. 6.13 I/O Ports There are six 8-bit ports named from P0 to P4 in W925E/C625. All ports can be configured as input or output mode. Except P0, every port has pull high resistor enable/disable by PxH register. After reset the initial state of each port is in input mode and the value of the registers from P0 to P3 are FFh. The I/O port is described as below: P0: I/O mode is controlled by P0IO. Only P0 output as open drain mode and without pull high resistor. - 49 - Publication Release Date: July 4, 2005 Revision A10 W925E/C625 P1: I/O mode is controlled by P1IO. Pull high is controlled by P1H. P1.0~P1.3 work as INT2, P1.4~P1.7 work as INT3. Falling edge on P1 pins to produce INT2 and INT3 flag. P1 is configured as INT2/INT3 by P1EF register. P2: I/O mode is controlled by P2IO. Pull high is controlled by P2H. P3: I/O mode is controlled by P3IO. Pull high is controlled by P3H. P3.5 P3.4 P3.3 P3.2 T1 T0 INT1 INT0 Timer/counter 1 external count input Timer/counter 0 external count input External interrupt 1 External interrupt 0 P4: I/O mode is controlled by P4IO. Pull high is controlled by P4H. Special function of P4 is described below. P4.4 P4.2 P4.1 P4.0 Vpos Vneg SDATA SCLK Positive input of the comparator Negative input of the comparator Serial port output Serial port input 6.14 Divider A built-in 13/14-bit binary up-counter designed to generate periodic interrupt. The clock source is from sub-oscillator. When the frequency of sub-crystal is 32768Hz, it provides the divider interrupt in the period of 0.25/0.5 second. Bit DIVS controls the degree of divider. When DIVA is high to enable the divided counter, when DIVA is low to reset divider and stop counting. As the divider overflows, the divider interrupt flag DIVF is set. DIVF is clear by software or serving divider interrupt routine. DIVS (CKCON1.1) overflow D ck CR Q DIVF (EXIF.3) Fs DIVA (DIVC.0) 1 13 14 Executing DIV Int Clear by software Figure 6-13 13/14-bit Divider - 50 - W925E/C625 6.15 LCD 1792 dots: 56 Segments x 32 Common, 1/5 bias An internal voltage pump is enable/disable by option code. The LCD on/off is controlled by bit LCDON (SCON1.6). If the voltage pump is enable, when LCDON is high to pump voltage and the LCD waveform is output to LCD pins according the LCD memory, when LCDON is low to turn off the voltage pump. The voltage of internal regulator is the base voltage of the voltage pump which 5 times of the base voltage. The output voltage of the regulator is tunable by 4 bits in regulator voltage control register (REGVC). When REGVC is equal to 0AH, the output voltage is 1.0V. The higher value of REGVC the lower voltage output of regulator. The adjustable voltage range is about from 0.72V to 1.48V . Accordingly, the LCD contrast is controlled by the value of REGVC. The variation of the voltage depends on the VDD. Following is the table of REGVC vs. regulator voltage. Regvc No Loading(3V) No Loading(5V) With LCD Loading(3v) With LCD Loading(5v) 00 01 02 03 04 05 06 07 08 09 0ah 0bh 0ch 0dh 0eh 0fh 1.497 1.4464 1.3941 1.3426 1.2899 1.238 1.186 1.1352 1.081 1.029 0.976 0.924 0.869 0.815 0.762 0.7112 1.500 1.449 1.397 1.345 1.292 1.241 1.188 1.137 1.083 1.031 0.978 0.925 0.87 0.816 0.763 0.712 1.46 1.41 1.36 1.31 1.330 1.26 1.21 1.16 1.11 1.05 1 0.95 0.9 0.85 0.80 0.75 0.71 1.484 1.433 1.381 1.278 1.227 1.176 1.125 1.072 1.024 0.975 0.926 0.874 0.825 0.773 0.723 LCD Frequency The alternating frequency of the LCD can be set as 16Hz, 32Hz, 64Hz and 128Hz that are determined by 2 bits of option code. Structure of the LCD alternating frequency (FLCD) is shown in Figure 6-14. 32K Sub-oscillator clock Q1 16K Q2 8K Q3 4K Q4 2K 00 01 M 10 u 11 x 2 bits of option code LCD COM Waveform Generator F LCD Figure 6-14 LCD alternating frequency (FLCD) circuit diagram Fw = 32.768 KHz, the LCD frequency is shown in the table below. - 51 - Publication Release Date: July 4, 2005 Revision A10 W925E/C625 Table7 The relationship between the FLCD and the 2 bits option code Option Code FLCD LCD RAM MAP The LCD memory address is list as below. Each dot is controlled by the corresponding bit and the content high to light the LCD dot and low to off the LCD dot. OUTPUT COM0 COM1 COM2 COM3 COM4 COM5 COM6 COM7 COM8 COM9 COM10 COM11 COM12 COM13 COM14 COM15 COM16 COM17 COM18 COM19 COM20 COM21 COM22 COM23 COM24 COM25 COM26 COM27 COM28 COM29 COM30 COM31 S55-S48 BIT7-0 2006H 200EH 2016H 201EH 2026H 202EH 2036H 203EH 2046H 204EH 2056H 205EH 2066H 206EH 2076H 207EH 2086H 208EH 2096H 209EH 20A6H 20AEH 20B6H 20BEH 20C6H 20CEH 20D6H 20DEH 20E6H 20EEH 20F6H 20FEH S47-S40 BIT7-0 2005H 200DH 2015H 201DH 2025H 202DH 2035H 203DH 2045H 204DH 2055H 205DH 2065H 206DH 2075H 207DH 2085H 208DH 2095H 209DH 20A5H 20ADH 20B5H 20BDH 20C5H 20CDH 20D5H 20DDH 20E5H 20EDH 20F5H 20FDH S39-S32 BIT7-0 2004H 200CH 2014H 201CH 2024H 202CH 2034H 203CH 2044H 204CH 2054H 205CH 2064H 206CH 2074H 207CH 2084H 208CH 2094H 209CH 20A4H 20ACH 20B4H 20BCH 20C4H 20CCH 20D4H 20DCH 20E4H 20ECH 20F4H 20FCH S31-S24 BIT7-0 2003H 200BH 2013H 201BH 2023H 202BH 2033H 203BH 2043H 204BH 2053H 205BH 2063H 206BH 2073H 207BH 2083H 208BH 2093H 209BH 20A3H 20ABH 20B3H 20BBH 20C3H 20CBH 20D3H 20DBH 20E3H 20EBH 20F3H 20FBH S23-S16 BIT7-0 2002H 200AH 2012H 201AH 2022H 202AH 2032H 203AH 2042H 204AH 2052H 205AH 2062H 206AH 2072H 207AH 2082H 208AH 2092H 209AH 20A2H 20AAH 20B2H 20BAH 20C2H 20CAH 20D2H 20DAH 20E2H 20EAH 20F2H 20FAH S15-S08 BIT7-0 2001H 2009H 2011H 2019H 2021H 2029H 2031H 2039H 2041H 2049H 2051H 2059H 2061H 2069H 2071H 2079H 2081H 2089H 2091H 2099H 20A1H 20A9H 20B1H 20B9H 20C1H 20C9H 20D1H 20D9H 20E1H 20E9H 20F1H 20F9H S07-S00 BIT7-0 2000H 2008H 2010H 2018H 2020H 2028H 2030H 2038H 2040H 2048H 2050H 2058H 2060H 2068H 2070H 2078H 2080H 2088H 2090H 2098H 20A0H 20A8H 20B0H 20B8H 20C0H 20C8H 20D0H 20D8H 20E0H 20E8H 20F0H 20F8H 00 16Hz 01 32Hz 10 64Hz 11 128Hz - 52 - W925E/C625 LCD Power Connection The LCD power connection of bias is shown in Figure 6-15 1/5 Bias DH1 0.1uF C H I P DH2 VSS C5 VLCD5 VLCD4 VLCD3 VLCD2 Regulator VLCD1 0.1uF C4 C3 C2 C1 C6 C1=C2=C3=C4=C5=C6=0.1uF Figure 6-15 1/5 Bias LCD Power Connection LCD Waveform The LCD waveform is B type. Figure 6-16 is an example for 1/5 bias LCD waveform. COM0 COM1 COM2 COM3 LCD outputs for only seg. on COM0 & COM2 side being lit Figure 6-16 LCD waveform for 1/5 bias - 53 - Publication Release Date: July 4, 2005 Revision A10 W925E/C625 6.16 Calling Identity Delivery (CID) W925E/C625 provides type I and type II of CID system. Type I is on-hook calling with CID message and type II is off-hook call on waiting. The CID function includes FSK decoder, dual tone alert signal detector, ring detector and DTMF receiver. The FSK demodulation function can demodulate Bell 202 and ITU-T V.23 Frequency Shift keying (FSK) with 1200 baud rate. The Tone Alert Signal detect function can detect dual tones of Bellcore Customer Premises Equipment(CPE) Tone Alerting Signal(CAS) and BT Idle State and Loop State Tone Alert Signal. The line reversal for BT, ring burst for CCA or ring signal for Bellcore can be detected by ring detector. It is compatible with Bellcore TRNWT-000030 & ST-TSV-002476, British Telecom(BT) SIN227, U.K. Cable Communications Association(CCA) specification. The DTMF receiver can be programmed as DTMF decoder to decode 16 DTMF signals or tone detector to detect the signal which frequency is in DTMF band. The tone detector can be an auxiliary detector to improve the performance of detecting tone alerting signal(CAS), said as talk down-off, in type II system. The FSK decoder, alert tone detector and DTMF receiver can be enable/disable individually by the bits of FSKE, CASE and DTMFE in FSK DATA REGISTER(FSKDR). CIDE is the global control bit to enable/disable FSK decoder, alert tone detector and DTMF receiver. However, the ring detector is always active. CIDGD CIDGA DTMFE PGD High Tone Bandpass Filter PHAD High Tone Detector Low Tone Detector INP2 INN2 GCFB2 Input Pre-processor + - Guard Time Timer ESt Decode data and Latch PGAF Anti-alias Filter PGD Low Tone Bandpass Filter DTMFD DD3-DD0 FSKE DTMFPT/DTMFAT FDATA FSK Demodulation Circuit FSK Bandpass Filter INP1 INN1 GCFB1 VREF CAP CIDE,RST VADD Input Pre-processor + - FSK Demodulator PHFL FSK Data Output Interface PGAF FD7-FD0 FDR FCD Anti-alias Filter FSK Carrier Detector DATE To internal circuit Bias Voltage Generator High Tone Bandpass Filter PHAD Low Tone Bandpass Filter PHFL Dual Tone Alert Signal Detection Circuit High Tone Detector Low Tone Detector Guard Time Circuit Interrupt Generator ALGO CASPT/CASAT Clock Driver VASS Ring Detector To internal circuit RNG Fm RNGDI RNGRC PS: The signals noted in italic and underline type are CID pins on the chip. Figure 6-17 The CID Block Diagram - 54 - W925E/C625 Ring Detector The application circuit in Figure 6-18 illustrates the relationship between the RNGDI, RNGRC and RNG signals. The combination of RNGDI and RNGRC is used to detect an increase of the RNGDI voltage from ground to a level above the Schmitt trigger high going threshold voltage VT+. C1=0.1uF Tip/A R3=200K RNGDI R1=470K C1=0.1uF Ring/B R2=470K R4=300K R5=150K RNGRC RNG C3=0.22uF Allowance minimal ring voltage (peak to peak) is: Vpp (max ring) = 2 (VT+(max) (R1 + R3 + R4) / R4 + 0.7) Tolerance to noise between Tip and Ring and VSS is: Vpeak (max noise) = VT+(min) (R1 + R3 + R4) / R4 + 0.7 Time constant is: T = R5 C3 ln [VDD / (VDD - VT+)] VT+(min) = 45mS (up to 5Sec) D = 80 - 262mS E = 45 - 75mS F = 200mS Figure 6-29 Input and Output Timing of BT Idle State (On-hook) Data Transmission Notes: 1. SIN227 specifies that the AC and DC loads should be applied at 20 ± 5Ms after the end of the dual tone alert signal. 2. SIN227 specifies that the AC and DC loads should be removed between 50 – 150Ms after the end of the FSK signal. 3. The FSKE bit should be set low to disable the FSK decoder when FSK is not expected. The tone alerting signal speech and the DTMF tones are in the same frequency band as the FSK signal. - 65 - Publication Release Date: July 4, 2005 Revision A10 W925E/C625 CPE goes off-hook Start Point Tip/Ring Note 1 A Note 3 CAS B CPE mutes handset & disables keypad CPE sends ACK C D E Mark F Message G CPE unmutes handset and enable keypad H ASE CIDF t REC t ABS ... ALGO FSKE Note 2 Note 4 Note 5 FCD FDR ... FCLK FDATA Data A = 40 - 50mS B = 80 - 85mS C