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Pinout von Programmable Communication Interface (8251)
| DB2 | <> |
1 | O |
28 | <> |
DB1 |
| DB3 | <> |
2 | 8251 | 27 | <> |
DB0 |
| RxD | −> |
3 | 26 | VCC | ||
| VSS | 4 | 25 | <− |
RxC | ||
| DB4 | <> |
5 | 24 | −> |
DTR | |
| DB5 | <> |
6 | 23 | −> |
RTS | |
| DB6 | <> |
7 | 22 | <− |
DSR | |
| DB7 | <> |
8 | 21 | <− |
RESET | |
| TxC | −> |
9 | 20 | <− |
CLK | |
| WR | −> |
10 | 19 | −> |
TxD | |
| CS | −> |
11 | 18 | −> |
TxEMPTY | |
| C/D Sel | −> |
12 | 17 | <− |
CTS | |
| RD | −> |
13 | 16 | <> |
SYNDET/BRKDET | |
| RxRDY | <− |
14 | 15 | −> |
TxRDY |