SCSI = Small Computer System Interface
50 PIN HI-DENSITY D-SUB FEMALE at
the controller and devices
50 PIN HI-DENSITY D-SUB MALE at the
cable
| Pin | Name | Dir | Description |
|---|---|---|---|
| 01 | GND | - | Ground |
| 02 | +DB0 | IN/OUT | +Data Bus 0 |
| 03 | +DB1 | IN/OUT | +Data Bus 1 |
| 04 | +DB2 | IN/OUT | +Data Bus 2 |
| 05 | +DB3 | IN/OUT | +Data Bus 3 |
| 06 | +DB4 | IN/OUT | +Data Bus 4 |
| 07 | +DB5 | IN/OUT | +Data Bus 5 |
| 08 | +DB6 | IN/OUT | +Data Bus 6 |
| 09 | +DB7 | IN/OUT | +Data Bus 7 |
| 10 | +DBP | IN/OUT | +Data Bus Parity (odd Parity) |
| 11 | DIFFSENS | ? | ??? |
| 12 | res | - | Reserved |
| 13 | TERMPWR | IN/OUT | Termination Power |
| 14 | res | - | Reserved |
| 15 | +ATN | IN | +Attention |
| 16 | GND | - | Ground |
| 17 | +BSY | IN/OUT | +Bus is busy |
| 18 | +ACK | IN | +Acknowledge |
| 19 | +RST | IN/OUT | +Reset |
| 20 | +MSG | OUT | +Message |
| 21 | +SEL | IN/OUT | +Select |
| 22 | +C/D | OUT | +Control or Data |
| 23 | +REQ | OUT | +Request |
| 24 | +I/O | OUT | +In/Out |
| 25 | GND | - | Ground |
| 26 | GND | - | Ground |
| 27 | -DB0 | IN/OUT | -Data Bus 0 |
| 28 | -DB1 | IN/OUT | -Data Bus 1 |
| 29 | -DB2 | IN/OUT | -Data Bus 2 |
| 30 | -DB3 | IN/OUT | -Data Bus 3 |
| 31 | -DB4 | IN/OUT | -Data Bus 4 |
| 32 | -DB5 | IN/OUT | -Data Bus 5 |
| 33 | -DB6 | IN/OUT | -Data Bus 6 |
| 34 | -DB7 | IN/OUT | -Data Bus Parity7 |
| 35 | -DBP | IN/OUT | -Data Bus Parity (odd Parity) |
| 36 | GND | - | Ground |
| 37 | res | - | Reserved |
| 38 | TERMPWR | IN/OUT | Termination Power |
| 39 | res | - | Reserved |
| 40 | -ATN | IN | -Attention |
| 41 | GND | - | Ground |
| 42 | -BSY | IN/OUT | -Bus is busy |
| 43 | -ACK | IN | -Acknowledge |
| 44 | -RST | IN/OUT | -Reset |
| 45 | -MSG | OUT | -Message |
| 46 | -SEL | IN/OUT | -Select |
| 47 | -C/D | OUT | -Control or Data |
| 48 | -REQ | OUT | -Request |
| 49 | -I/O | OUT | -In/Out |
| 50 | GND | - | Ground |
Notes
- Direction is Device relative Bus (other Devices).
- For more informations, references and sources go to SCSI Technology