Z80 Home

Z80 Serial In/out


NOTE: the asterisk means ACTIVE LOW

Z 80 SIO/0 Pin Use Pin Use Pin Use Pin Use
1 D1 11 *SYNC A 21 *RESET 31 GND
2 D3 12 RxDA 22 *DCDB 32 *RD
3 D5 13 *RxCA 23 *CTSB 33 C/*D
4 D7 14 *TxCA 24 *RTSB 34 B/*A
5 *INT 15 TxDA 25 *DTRB 35 *CE
6 IEI 16 *DTRA 26 TxDB 36 *IORQ
7 IEO 17 *RTSA 27 *RxTxCB 37 D6
8 *M1 18 *CTSA 28 RxDB 38 D4
9 + 5V 19 *DCDA 29 *SYNCB 39 D2
10 *W/RDYA 20 CLOCK 30 *W/RDYB 40 D0

Z 80 SIO/1 Pin Use Pin Use Pin Use Pin Use
1 D1 11 *SYNC A 21 *RESET 31 GND
2 D3 12 RxDA 22 *DCDB 32 *RD
3 D5 13 *RxCA 23 *CTSB 33 C/*D
4 D7 14 *TxCA 24 *RTSB 34 B/*A
5 *INT 15 TxDA 25 TxDB 35 *CE
6 IEI 16 *DTRA 26 TxCB 36 *IORQ
7 IEO 17 *RTSA 27 *RxCB 37 D6
8 *M1 18 *CTSA 28 RxDB 38 D4
9 + 5V 19 *DCDA 29 *SYNCB 39 D2
10 *W/RDYA 20 CLOCK 30 *W/RDYB 40 D0

Z 80 SIO/2 Pin Use Pin Use Pin Use Pin Use
1 D1 11 *SYNC A 21 *RESET 31 GND
2 D3 12 RxDA 22 *DCDB 32 *RD
3 D5 13 *RxCA 23 *CTSB 33 C/*D
4 D7 14 *TxCA 24 *RTSB 34 B/*A
5 *INT 15 TxDA 25 *DTRB 35 *CE
6 IEI 16 *DTRA 26 TxDB 36 *IORQ
7 IEO 17 *RTSA 27 *TxCB 37 D6
8 *M1 18 *CTSA 28 *RxCB 38 D4
9 + 5V 19 *DCDA 29 RxDB 39 D2
10 *W/RDYA 20 CLOCK 30 *W/RDYB 40 D0


Docs about how to program this device.