部分单片机脚功能

56778rrrre

Z80CTC, Z8430Z80 Counter-Timer Circuit.  +-----+--+-----+ D4 |1 +--+ 28| D3 D5 |2 27| D2 D6 |3 26| D1 D7 |4 25| D0 GND |5 24| VCC /RD |6 23| CLK0 TRG0ZC0 TO0 |7 Z8430 22| CLK1 TRG1ZC1 TO1 |8 CTC 21| CLK2 TRG2ZC2 TO2 |9 20| CLK3 TRG3 /IORQ |10 19| A1 IEO |11 18| A0 /INT |12 17| /RST IEI |13 16| /CE /M1 |14 15| CLK +--------------+Z80DART, Z8470Z80 dual async/sync serial I/O. Z8470 (DART) has no synchronous capabilities.  +-----+--+-----+ D1 |1 +--+ 40| D0 D3 |2 39| D2 D5 |3 38| D4 D7 |4 37| D6 /INT |5 36| /IORQ IEI |6 35| /CE IEO |7 34| A0 B/A /M1 |8 33| A1 C/D VCC |9 32| /RD/W_RDYA |10 Z8440 31| GND/SYNCA |11 SIO-0 30| /W_RDYB RxDA |12 29| /SYNCB /RxCA |13 28| RxDB /TxCA |14 27| /RxTxCB TxDA |15 26| TxDB /DTRA |16 25| /DTRB /RTSA |17 24| /RTSB /CTSA |18 23| /CTSB /DCDA |19 22| /DCDB CLK |20 21| /RST +--------------+Z80DMA, Z8410Z80 DMA controller.  +-----+--+-----+ A5 |1 +--+ 40| A6 A4 |2 39| A7 A3 |3 38| IEI A2 |4 37| /INT /PULSE A1 |5 36| IEO A0 |6 35| D0 CLK |7 34| D1 /WR |8 33| D2 /RD |9 32| D3 /IORQ |10 Z8410 31| D4 VCC |11 DMA 30| GND /MREQ |12 29| D5 /BAO |13 28| D6 /BAI |14 27| D7 /BUSRQ |15 26| /M1/CE /WAIT |16 25| RDY A15 |17 24| A8 A14 |18 23| A9 A13 |19 22| A10 A12 |20 21| A11 +--------------+Z80PIO, Z8420Z80 parallel I/O.  +-----+--+-----+ D2 |1 +--+ 40| D3 D7 |2 39| D4 D6 |3 38| D5 /CE |4 37| /M1C/D A1 |5 36| /IORQB/A A0 |6 35| /RD PA7 |7 34| PB7 PA6 |8 33| PB6 PA5 |9 32| PB5 PA4 |10 Z8420 31| PB4 GND |11 PIO 30| PB3 PA3 |12 29| PB2 PA2 |13 28| PB1 PA1 |14 27| PB0 PA0 |15 26| VCC/ASTB |16 25| CLK/BSTB |17 24| IEI ARDY |18 23| /INT D0 |19 22| IEO D1 |20 21| BRDY +--------------+Z80SIO, Z80SIO0, Z8440, Z8470Z80 dual async/sync serial I/O. Z8470 (DART) has no synchronous capabilities.  +-----+--+-----+ D1 |1 +--+ 40| D0 D3 |2 39| D2 D5 |3 38| D4 D7 |4 37| D6 /INT |5 36| /IORQ IEI |6 35| /CE IEO |7 34| A0 B/A /M1 |8 33| A1 C/D VCC |9 32| /RD/W_RDYA |10 Z8440 31| GND/SYNCA |11 SIO-0 30| /W_RDYB RxDA |12 29| /SYNCB /RxCA |13 28| RxDB /TxCA |14 27| /RxTxCB TxDA |15 26| TxDB /DTRA |16 25| /DTRB /RTSA |17 24| /RTSB /CTSA |18 23| /CTSB /DCDA |19 22| /DCDB CLK |20 21| /RST +--------------+MAX703uP supervisor circuit with battery backup. /RST remains low for 200ms after VCC exceeds 4.65V. On power failure VCCo is connected to VBAT, PFI and /MR are dISAbLED, /RST and /PFO are low.  +---+--+---+VCCo |1 +--+ 8| VBATVCC |2 MAX 7| /RSTGND |3 703 6| /MRPFI |4 5| /PFO +----------+765Floppy disk controller.  +-----+--+-----+ RST |1 +--+ 40| VCC /RD |2 39| /RW SEEK /WR |3 38| LCT DIR /CE |4 37| FR STEPD/S A0 |5 36| HDL D0 |6 35| RDY D1 |7 34| WP TS D2 |8 33| FLT TR00 D3 |9 32| PS0 D4 |10 765 31| PS1 D5 |11 FDC 30| WDA D6 |12 29| US0 D7 |13 28| US1 DRQ |14 27| HD/DACK |15 26| MFM TC |16 25| WE IDX |17 24| VCO SYNC INT |18 23| RDD CLK |19 22| RDW GND |20 21| WCLK +--------------+Z80SIO1, Z8441Z80 dual async/sync serial I/O (bonding option #1).  +-----+--+-----+ D1 |1 +--+ 40| D0 D3 |2 39| D2 D5 |3 38| D4 D7 |4 37| D6 /INT |5 36| /IORQ IEI |6 35| /CE IEO |7 34| A0 B/A /M1 |8 33| A1 C/D VCC |9 32| /RD/W_RDYA |10 Z8441 31| GND/SYNCA |11 SIO-1 30| /W_RDYB RxDA |12 29| /SYNCB /RxCA |13 28| RxDB /TxCA |14 27| /RxCB TxDA |15 26| /TxCB /DTRA |16 25| TxDB /RTSA |17 24| /RTSB /CTSA |18 23| /CTSB /DCDA |19 22| /DCDB CLK |20 21| /RST +--------------+Z80SIO2, Z8442Z80 dual async/sync serial I/O (bonding option #2).  +-----+--+-----+ D1 |1 +--+ 40| D0 D3 |2 39| D2 D5 |3 38| D4 D7 |4 37| D6 /INT |5 36| /IORQ IEI |6 35| /CE IEO |7 34| A0 B/A /M1 |8 33| A1 C/D VCC |9 32| /RD/W_RDYA |10 Z8442 31| GND /SYNCA |11 SIO-2 30| /W_RDYB RxDA |12 29| RxDB /RxCA |13 28| /RxCB /TxCA |14 27| /TxCB TxDA |15 26| TxDB /DTRA |16 25| /DTRB /RTSA |17 24| /RTSB /CTSA |18 23| /CTSB /DCDA |19 22| /DCDB CLK |20 21| /RST +--------------+SAA1064I2C 4 digit common-anode LED driver. I2C address is 01110xx where xx CAN be specified by the voltage on the ADR input (GND=00 3/8VCC=01 5/8VCC=10 VCC=11).  +---+--+---+ ADR |1 +--+ 24| SCLCext |2 23| SDA1Y8 |3 22| 2Y81Y7 |4 21| 2Y71Y6 |5 20| 2Y61Y5 |6 19| 2Y51Y4 |7 1064 18| 2Y41Y3 |8 17| 2Y31Y2 |9 16| 2Y21Y1 |10 15| 2Y1MX1 |11 14| MX2GND |12 13| VCC +----------+DS1202Real-time cLOCk with 3-wire serial interface and 24 bytes RAM.  +---+--+---+ |1 +--+ 8| VCCX1 |2 DS 7| CLKX2 |3 1202 6| DQGND |4 5| /RST +----------+DS1210Nonvolatile SRAM controller Chip. TOL selects power-fail VCC level, based on 5% tolerance when 0 or 10% tolerance when 1.  +---+--+---+ +---+----*---+VCCo |1 +--+ 8| VCC |/EN|VCC |/Y |VBAT1 |2 DS 7| VBAT2 +===+====*===+ TOL |3 1210 6| /Y | 1 | OK | 1 | GND |4 5| /EN | 0 | OK | 0 | +----------+ | X | LO | 1 | +---+----*---+DS12111-of-8 inverting decoder/nonvolatile SRAM controller chip. TOL selects power-fail VCC level, based on 5% tolerance when 0 or 10% tolerance when 1. The Dallas SEMI data book suggests this is actually a rePACkaged DS1212.  +---+--+---+ +---+---+---+---+----*---+---+---+---+---+VBAT1 |1 +--+ 20| VCC |/EN| S2| S1| S0|VCC |/Y0|/Y1|...|/Y7|/PF|VCCo |2 19| VBAT2 +===+===+===+===+====*===+===+===+===+===+ TOL |3 18| /EN | X | X | X | X | LO | 1 | 1 | 1 | 1 | 0 | /PF |4 17| /Y0 | 1 | 0 | 0 | 0 | OK | 0 | 1 | 1 | 1 | 1 | /Y7 |5 DS 16| /Y1 | 0 | 0 | 0 | 1 | OK | 1 | 0 | 1 | 1 | 1 | /Y6 |6 1211 15| /Y2 | 0 | . | . | . | OK | 1 | 1 | . | 1 | 1 | S2 |7 14| /Y3 | 0 | 1 | 1 | 1 | OK | 1 | 1 | 1 | 0 | 1 | S1 |8 13| +---+---+---+---+----*---+---+---+---+---+ S0 |9 12| /Y4 GND |10 11| /Y5 +----------+DS12121-of-16 inverting decoder/nonvolatile SRAM controller chip. TOL selects power-fail VCC level, based on 5% tolerance when 0 or 10% tolerance when 1.  +-----+--+-----+ +---+---+---+---+---+----*---+---+---+----+---+VBAT1 |1 +--+ 28| VCC |/EN| S3| S2| S1| S0|VCC |/Y0|/Y1|...|/Y15|/PF|VCCo |2 27| VBAT2 +===+===+===+===+===+====*===+===+===+====+===+ TOL |3 26| /EN | X | X | X | X | X | LO | 1 | 1 | 1 | 1 | 0 | /PF |4 25| /Y0 | 1 | 0 | 0 | 0 | 0 | OK | 0 | 1 | 1 | 1 | 1 |/Y15 |5 24| /Y1 | 0 | 0 | 0 | 0 | 1 | OK | 1 | 0 | 1 | 1 | 1 |/Y14 |6 23| /Y2 | 0 | . | . | . | . | OK | 1 | 1 | . | 1 | 1 |/Y13 |7 DS 22| /Y3 | 0 | 1 | 1 | 1 | 1 | OK | 1 | 1 | 1 | 0 | 1 |/Y12 |8 1212 21| /Y4 +---+---+---+---+---+----*---+---+---+----+---+/Y11 |9 20| /Y5 S3 |10 19| /Y6 S2 |11 18| /Y7 S1 |12 17| /Y8 S0 |13 16| /Y9 GND |14 15| /Y10 +--------------+DS1285, DS1287, DS1287AReal-time clock with 50 bytes RAM. DS1287(A) has built-in quartz Crystal and lihium battery, and therefore the X1, X2 and VBAT PINs are no-connect. On the (older) DS1287 the /RCLR pin is no-connect as well.  +-----+--+-----+MOT |1 +--+ 24| VCCX1 |2 23| SQWX2 |3 22|AD0 |4 21| /RCLRAD1 |5 20| VBATAD2 |6 DS1285 19| /INTAD3 |7 18| /RSTAD4 |8 17| DSAD5 |9 16| GNDAD6 |10 15| R//WAD7 |11 14| ASGND |12 13| /CE +--------------+Z16C30Dual universal serial controller. PLCC68+---------------+---------------+---------------+---------------+| 10 /RxACKA | 27 /TxREQA | 44 /RxREQB | 61 /TxACKB || 11 /INTA | 28 /RxCA | 45 VCC | 62 /PITACK || 12 IEIA | 29 RxDA | 46 GND | 63 R//W || 13 IEOA | 30 /DCDA | 47 AD15 | 64 /WR || 14 GND | 31 /TxCA | 48 AD14 | 65 /RD || 15 VCC | 32 TxDA | 49 AD13 | 66 /DS || 16 AD0 | 33 /CTSA | 50 AD12 | 67 /AS || 17 AD1 | 34 GND | 51 AD11 | 68 VCC || 18 AD2 | 35 GND | 52 AD10 | 1 VCC || 19 AD3 | 36 GND | 53 AD9 | 2 VCC || 20 AD4 | 37 /CTSB | 54 AD8 | 3 /RST || 21 AD5 | 38 TxDB | 55 VCC | 4 /CE || 22 AD6 | 39 /TxCB | 56 GND | 5 D//C || 23 AD7 | 40 /DCDB | 57 IEOB | 6 A//B || 24 GND | 41 RxDB | 58 IEIB | 7 /SITACK || 25 VCC | 42 /RxCB | 59 /INTB | 8 /WAIT//RDY || 26 /RxREQA | 43 /TxREQB | 60 /RxACKB | 9 /TxACKA |+---------------+---------------+---------------+---------------+Z16C33Mono universal serial controller with ISDN time slot assigner. PLCC68+---------------+---------------+---------------+---------------+| 10 /RxACK | 27 /TxREQ | 44 PORT7 | 61 || 11 /INT | 28 /RxC | 45 VCC | 62 /PITACK || 12 IEI | 29 RxD | 46 GND | 63 R//W || 13 IEO | 30 /DCD | 47 AD15 | 64 /WR || 14 GND | 31 /TxC | 48 AD14 | 65 /RD || 15 VCC | 32 TxD | 49 AD13 | 66 /DS || 16 AD0 | 33 /CTS | 50 AD12 | 67 /AS || 17 AD1 | 34 GND | 51 AD11 | 68 VCC || 18 AD2 | 35 GND | 52 AD10 | 1 VCC || 19 AD3 | 36 GND | 53 AD9 | 2 VCC || 20 AD4 | 37 PORT0 | 54 AD8 | 3 /RST || 21 AD5 | 38 PORT1 | 55 VCC | 4 /CE || 22 AD6 | 39 PORT2 | 56 GND | 5 D//C || 23 AD7 | 40 PORT3 | 57 | 6 PS || 24 GND | 41 PORT4 | 58 | 7 /SITACK || 25 VCC | 42 PORT5 | 59 | 8 /WAIT//RDY || 26 /RxREQ | 43 PORT6 | 60 | 9 /TxACK |+---------------+---------------+---------------+---------------+6520, 68216800 and 6502 families peripheral interface adapters.  +-----+--+-----+ GND |1 +--+ 40| CA1 PA0 |2 39| CA2 PA1 |3 38| /IRQA PA2 |4 37| /IRQB PA3 |5 36| RS0 PA4 |6 35| RS1 PA5 |7 34| /RST PA6 |8 33| D0 PA7 |9 32| D1 PB0 |10 MC6821 31| D2 PB1 |11 6520 30| D3 PB2 |12 29| D4 PB3 |13 28| D5 PB4 |14 27| D6 PB5 |15 26| D7 PB6 |16 25| E (P2) PB7 |17 24| CE1 CB1 |18 23| /CE2 CB2 |19 22| CE0 VCC |20 21| R//W +--------------+65306502 family versatile interface adapter.  +-----+--+-----+ GND |1 +--+ 40| PA1 PA0 |2 39| PA2 E (P2) |3 38| PA3 RS |4 37| PA4 A9 |5 36| PA5 A8 |6 35| PA6 A7 |7 34| PA7 A6 |8 33| DB0 R/W |9 32| DB1 A5 |10 6530 31| DB2 A4 |11 30| DB3 A3 |12 29| DB4 A2 |13 28| DB5 A1 |14 27| DB6 A0 |15 26| DB7 /RST |16 25| PB0/IRQ PB7 |17 24| PB1CS1 PB6 |18 23| PB2CS2 PB5 |19 22| PB3 VCC |20 21| PB4 +--------------+65516502 family asynchronous serial interface controller.  +-----+--+-----+GND |1 +--+ 28| R//WCE0 |2 27| CLK/CE1 |3 26| /IRQ/RST |4 25| D7RxC |5 24| D6 X1 |6 23| D5 X0 |7 6551 22| D4/RTS |8 21| D3/CTS |9 20| D2TxD |10 19| D1/DTR |11 18| D0RxD |12 17| /DSRRS0 |13 16| /DCDRS1 |14 15| VCC +--------------+6818Real-time clock with 50 bytes RAM.  +-----+--+-----+ |1 +--+ 24| VCCX1 |2 23| SQWX2 |3 22|AD0 |4 21| /RCLRAD1 |5 20| VBATAD2 |6 146818 19| /INTAD3 |7 18| /RSTAD4 |8 17| DSAD5 |9 16| GNDAD6 |10 15| R//WAD7 |11 14| ASGND |12 13| /CE +--------------+68456800 family CRT Controller.  +-----+--+-----+ GND |1 +--+ 40| VSYNC /RST |2 39| HSYNCLPSTB |3 38| RA0 MA0 |4 37| RA1 MA1 |5 36| RA2 MA2 |6 35| RA3 MA3 |7 34| RA4 MA4 |8 33| D0 MA5 |9 32| D1 MA6 |10 6845 31| D2 MA7 |11 CRTC 30| D3 MA8 |12 29| D4 MA9 |13 28| D5 MA10 |14 27| D6 MA11 |15 26| D7 MA12 |16 25| /CE MA13 |17 24| A0DISPEN |18 23| IORQCURSOR |19 22| R/W VCC |20 21| CLK +--------------+68506800 family asynchronous communICations interface.  +-----+--+-----+ GND |1 +--+ 24| /CTS RxD |2 23| /DCDRxCLK |3 22| D0TxCLK |4 21| D1/RTS |5 20| D2 TxD |6 19| D3/IRQ |7 6850 18| D4 CE0 |8 17| D5/CE2 |9 16| D6 CE1 |10 15| D7 RS |11 14| E VCC |12 13| R//W +--------------+68526800 family synchronous serial data adapter.  +-----+--+-----+ GND |1 +--+ 24| /CTS RxD |2 23| /DCD RxCLK |3 22| D0 TxCLK |4 21| D1SM /DTR |5 20| D2 TxD |6 19| D3 /IRQ |7 6852 18| D4 TUF |8 17| D5 /RST |9 16| D6 /CE |10 15| D7 RS |11 14| E VCC |12 13| R//W +--------------+82438048 Port expander.  +-----+--+-----+P5.0 |1 +--+ 24| VCCP4.0 |2 23| P5.1P4.1 |3 22| P5.2P4.2 |4 21| P5.3P4.3 |5 20| P6.0/CE |6 19| P6.1PROG |7 8243 18| P6.2P2.3 |8 17| P6.3P2.2 |9 16| P7.3P2.1 |10 15| P7.2P2.0 |11 14| P7.1GND |12 13| P7.0 +--------------+8250Asynchronous serial interface controller.  +-----+--+-----+ D0 |1 +--+ 40| VCC D1 |2 39| /RI D2 |3 38| /DCD D3 |4 37| /DSR D4 |5 36| /CTS D5 |6 35| MR D6 |7 34| /OUT1 D7 |8 33| /DTR RCLK |9 32| /RTS RxD |10 16450 31| /OUT2 TxD |11 8250 30| INTR CE0 |12 29| CE1 |13 28| A0 /CE2 |14 27| A1/CLKOUT |15 26| A2 X1 |16 25| /ADS X0 |17 24| CSOUT /WR |18 23| DDIS WR |19 22| RD GND |20 21| /RD +--------------+8251Universal asynchronous receiver/transmitter.  +-----+--+-----+ D2 |1 +--+ 28| D1 D3 |2 27| D0 RxD |3 26| VCC GND |4 25| /RxC D4 |5 24| /DTR D5 |6 23| /RTS D6 |7 8251 22| /DSR D7 |8 21| RST/TxC |9 20| CLK /WR |10 19| TxD /CE |11 18| TxEMPTYC//D |12 17| /CTS /RD |13 16| SYCDET BDRxRDY |14 15| TXRDY +--------------+8253, 8254Programmable interval timer/counter.  +-----+--+-----+ D7 |1 +--+ 24| VCC D6 |2 23| /WR D5 |3 22| /RD D4 |4 21| /CE D3 |5 20| A1 D2 |6 8253 19| A0 D1 |7 8254 18| CLK2 D0 |8 17| OUT2CLK0 |9 16| G2OUT0 |10 15| CLK1 G0 |11 14| G1GND |12 13| OUT1 +--------------+8255Parallel Peripheral Interface.  +-----+--+-----+PA3 |1 +--+ 40| PA4PA2 |2 39| PA5PA1 |3 38| PA6PA0 |4 37| PA7/RD |5 36| /WR/CE |6 35| RSTGND |7 34| D0A1 |8 33| D1A0 |9 32| D2PC7 |10 8255 31| D3PC6 |11 30| D4PC5 |12 29| D5PC4 |13 28| D6PC0 |14 27| D7PC1 |15 26| VCCPC2 |16 25| PB7PC3 |17 24| PB6PB0 |18 23| PB5PB1 |19 22| PB4PB2 |20 21| PB3 +--------------+Z8530, Z8531Zilog Serial Communications Controller. Z8531 has no synchronous capabilities.  +-----+--+-----+ D1 |1 +--+ 40| D0 D3 |2 39| D2 D5 |3 38| D4 D7 |4 37| D6 /INT |5 36| /RD IEO |6 35| /WR IEI |7 34| A0 A/B /INTAK |8 33| /CE VCC |9 32| A1 D/C /W_REQA |10 Z8530 31| GND /SYNCA |11 SCC 30| /W_REQB /RTxCA |12 29| /SYNCB RxDA |13 28| /RTxCB /TRxCA |14 27| RxDB TxDA |15 26| /TRxCB/DTR_REQA |16 25| TxDB /RTSA |17 24| /DTR_REQB /CTSA |18 23| /RTSB /DCDA |19 22| /CTSB CLK |20 21| /DCDB +--------------+8574, 8574AI2C parallel I/O expander. I2C address is 0100xxx for the 8574 and 0111xxx for the 8574A, where xxx can be specified by the A0-2 inputs.  +---+--+---+ A0 |1 +--+ 16| VCCA1 |2 15| SDAA2 |3 14| SCLP0 |4 13| /INTP1 |5 8574 12| P7P2 |6 11| P6P3 |7 10| P5GND |8 9| P4 +----------+8584I2C bus controller. Bus controller ties to either Z80-style bus or to 68000-style bus, and determines the mode from the first few cycles.  +---+--+---+  CLK |1 +--+ 20| VCCSDAo SDA |2 19| /RST /STBSCLo SCL |3 18| /WR R//WSDAi /IACK |4 17| /CSSCLi /INT |5 16| /RD /DTACK A0 |6 8584 15| D7 D0 |7 14| D6 D1 |8 13| D5 D2 |9 12| D4 GND |10 11| D3 +----------+16450Asynchronous serial interface controller.  +-----+--+-----+ D0 |1 +--+ 40| VCC D1 |2 39| /RI D2 |3 38| /DCD D3 |4 37| /DSR D4 |5 36| /CTS D5 |6 35| MR D6 |7 34| /OUT1 D7 |8 33| /DTR RCLK |9 32| /RTS RxD |10 16450 31| /OUT2 TxD |11 8250 30| INTR CE0 |12 29| CE1 |13 28| A0 /CE2 |14 27| A1/CLKOUT |15 26| A2 X1 |16 25| /ADS X0 |17 24| CSOUT /WR |18 23| DDIS WR |19 22| RD GND |20 21| /RD +--------------+16550Asynchronous serial interface controller with DMA support and 16-byte FIFOs.  +-----+--+-----+ D0 |1 +--+ 40| VCC D1 |2 39| /RI D2 |3 38| /DCD D3 |4 37| /DSR D4 |5 36| /CTS D5 |6 35| MR D6 |7 34| /OUT1 D7 |8 33| /DTR RCLK |9 32| /RTS RxD |10 16550 31| /OUT2 TxD |11 30| INTR CE0 |12 29| /RXRDY CE1 |13 28| A0 /CE2 |14 27| A1/CLKOUT |15 26| A2 X1 |16 25| /ADS X0 |17 24| /TXRDY /WR |18 23| DDIS WR |19 22| RD GND |20 21| /RD +--------------+16552Dual asynchronous serial interface controller with DMA support and 16-byte FIFOs, and an 8-bit parallel printer port. PLCC68+---------------+---------------+---------------+---------------+| 10 2TxD | 27 GND | 44 1BD | 61 /2RXRDY || 11 /2DTR | 28 /1CTS | 45 1INT | 62 2RxD || 12 /2RTS | 29 /1DCD | 46 PD7 | 63 /ERR || 13 /2CTS | 30 /1RI | 47 PD6 | 64 VCC || 14 D0 | 31 /1DSR | 48 PD5 | 65 SLCT || 15 D1 | 32 /1CE | 49 PD4 | 66 BUSY || 16 D2 | 33 A2 | 50 PD3 | 67 PE || 17 D3 | 34 A1 | 51 PD2 | 68 /ACK || 18 D4 | 35 A0 | 52 PD1 | 1 PEMD || 19 D5 | 36 /WR | 53 PD0 | 2 2TR || 20 D6 | 37 /RD | 54 GND | 3 /2CE || 21 D7 | 38 /PCE | 55 /STB | 4 CLK || 22 /1TXRDY | 39 /RST | 56 /AFD | 5 /2DSR || 23 VCC | 40 VCC | 57 /INIT | 6 /2RI || 24 /1RTS | 41 1RxD | 58 /SLIN | 7 GND || 25 /1DTR | 42 /2TXRDY | 59 PINT | 8 /2DCD || 26 1TxD | 43 /ENIRQ | 60 2INT | 9 /1RXRDY |+---------------+---------------+---------------+---------------+16554Quad asynchronous serial interface controller with DMA support and 16-byte FIFOs. PLCC68+---------------+---------------+---------------+---------------+| 10 /1DSR | 27 /2DCD | 44 /3DSR | 61 /4DCD || 11 /1CTS | 28 /2RI | 45 /3CTS | 62 /4RI || 12 /1DTR | 29 2RxD | 46 /3DTR | 63 4RxD || 13 VCC | 30 VCC | 47 VCC | 64 VCC || 14 /1RTS | 31 | 48 /3RTS | 65 /INTN || 15 1INT | 32 A2 | 49 3INT | 66 D0 || 16 /1CE | 33 A1 | 50 /3CE | 67 D1 || 17 1TxD | 34 A0 | 51 3TxD | 68 D2 || 18 /WR | 35 X1 | 52 /RD | 1 D3 || 19 2TxD | 36 X2 | 53 4TxD | 2 D4 || 20 /2CE | 37 RST | 54 /4CE | 3 D5 || 21 2INT | 38 /RXRDY | 55 4INT | 4 D6 || 22 /2RTS | 39 /TXRDY | 56 /4RTS | 5 D7 || 23 GND | 40 GND | 57 GND | 6 GND || 24 /2DTR | 41 3RxD | 58 /4DTR | 7 1RxD || 25 /2CTS | 42 /3RI | 59 /4CTS | 8 /1RI || 26 /2DSR | 43 /3DCD | 60 /4DSR | 9 /1DCD |+---------------+---------------+---------------+---------------+68153680x0 family bus interrupter.  +-----+--+-----+ VCC |1 +--+ 40| A3 R//W |2 39| A2 /CE |3 38| A1/DTACK |4 37| D7/IACK |5 36| D6/IACKi |6 35| D5/IACKo |7 34| D4/IRQ1 |8 33| D3 GND |9 32| D2 GND |10 31| GND VCC |11 68153 30| VCC/IRQ2 |12 29| D1/IRQ3 |13 28| D0/IRQ4 |14 27| /INTAE/IRQ5 |15 26| INTAL1/IRQ6 |16 25| INTAL0/IRQ7 |17 24| /INT3 CLK |18 23| /INT2/INT0 |19 22| /INT1 GND |20 21| VCC +--------------+68230 (PLCC)680x0 family Parallel Interface and Timer (PI/T) PLCC52+---------------+---------------+---------------+---------------+| 8 | 21 | 34 PC0 | 47 R//W || 9 PA4 | 22 PB2 | 35 PC1 | 48 D0 || 10 PA5 | 23 PB3 | 36 PC2 TIN | 49 D1 || 11 PA6 | 24 PB4 | 37 PC3 TOUT | 50 D2 || 12 PA7 | 25 PB5 | 38 PC4 /DMARQ | 51 D3 || 13 VCC | 26 PB6 | 39 PC5 /PIRQ | 52 D4 || 14 H1 | 27 PB7 | 40 PC6 /PIACK | 1 D5 || 15 H2 | 28 A4 | 41 PC7 /TIACK | 2 D6 || 16 H3 | 29 A3 | 42 GND | 3 D7 || 17 H4 | 30 A2 | 43 /RST | 4 PA0 || 18 PB0 | 31 A1 | 44 CLK | 5 PA1 || 19 PB1 | 32 A0 | 45 /CE | 6 PA2 || 20 | 33 | 46 /DTACK | 7 PA3 |+---------------+---------------+---------------+---------------+68230 (DIP)680x0 family Parallel Interface and Timer (PI/T)  +-----+--+-----+D5 |1 +--+ 48| D4D6 |2 47| D3D7 |3 46| D2PA0 |4 45| D1PA1 |5 44| D0PA2 |6 43| R//WPA3 |7 42| /DTACKPA4 |8 41| /CEPA5 |9 40| CLKPA6 |10 39| /RSTPA7 |11 38| GNDVCC |12 37| PC7 /TIACKH1 |13 68230 36| PC6 /PIACKH2 |14 35| PC5 /PIRQH3 |15 34| PC4 /DMAREQH4 |16 33| PC3 TOUTPB0 |17 32| PC2 TINPB1 |18 31| PC1PB2 |19 30| PC0PB3 |20 29| RS0PB4 |21 28| RS1PB5 |22 27| RS2PB6 |23 26| RS3PB7 |24 25| RS4 +--------------+68452680x0 family bus arbiter.  +-----+--+-----+ VCC |1 +--+ 28| GND VCC |2 27| /BCLR /GT4 |3 26| /GT0/REQ3 |4 25| /REQ4 /GT5 |5 24| /GT1/REQ2 |6 23| /REQ5/REQ1 |7 22| /REQ6 GND |8 68452 21| /REQ7/REQ0 |9 20| /BG /LEI |10 19| /BR/BGACK |11 18| /GT2 /GT7 |12 17| /GT3 /GT6 |13 16| VCC GND |14 15| VCC +--------------+68901 (DIP)680x0 multi-function peripheral.  +-----+--+-----+R//W |1 +--+ 48| /CERS0 |2 47| /DSRS1 |3 46| /DTACKRS2 |4 45| /IACKRS3 |5 44| D7RS4 |6 43| D6 TC |7 42| D5 SO |8 41| D4 SI |9 40| D3 RC |10 39| D2VCC |11 38| D1 |12 37| D0TAO |13 68901 36| GNDTBO |14 35| CLKTCO |15 34| /IEITDO |16 33| /IEO X1 |17 32| /IRQ X0 |18 31| /RRTAI |19 30| /TRTBI |20 29| INT7/RST |21 28| INT6INT0 |22 27| INT5INT1 |23 26| INT4INT2 |24 25| INT3 +--------------+68901 (PLCC)680x0 multi-function peripheral. PLCC52+---------------+---------------+---------------+---------------+| 8 TC | 21 | 34 /TR | 47 D6 || 9 SO | 22 TAI | 35 /RR | 48 D7 || 10 SI | 23 TBI | 36 /IRQ | 49 /IACK || 11 RC | 24 /RST | 37 /IEO | 50 /DTACK || 12 VCC | 25 INT0 | 38 /IEI | 51 /DS || 13 | 26 INT1 | 39 CLK | 52 /CE || 14 | 27 INT2 | 40 GND | 1 || 15 TAO | 28 INT3 | 41 D0 | 2 R//W || 16 TBO | 29 INT4 | 42 D1 | 3 RS0 || 17 TCO | 30 INT5 | 43 D2 | 4 RS1 || 18 TDO | 31 INT6 | 44 D3 | 5 RS2 || 19 X1 | 32 INT7 | 45 D4 | 6 RS3 || 20 X0 | 33 | 46 D5 | 7 RS4 |+---------------+---------------+---------------+---------------+146818Real-time clock with 50 bytes RAM.  +-----+--+-----+ |1 +--+ 24| VCCX1 |2 23| SQWX2 |3 22|AD0 |4 21| /RCLRAD1 |5 20| VBATAD2 |6 146818 19| /INTAD3 |7 18| /RSTAD4 |8 17| DSAD5 |9 16| GNDAD6 |10 15| R//WAD7 |11 14| ASGND |12 13| /CE +--------------+