SCSI = Small Computer System Interface
SCSI-3 External Hi D-Sub (Differential)
68 pin hi-density D-SUB female
connector at the controller and devices.
68 pin hi-density D-SUB male
connector at the cable.
| Pin | Name | Dir | Description |
|---|---|---|---|
| 1 | +DB12 | IN/OUT | +Data Bus 12 |
| 2 | +DB13 | IN/OUT | +Data Bus 13 |
| 3 | +DB14 | IN/OUT | +Data Bus 14 |
| 4 | +DB15 | IN/OUT | +Data Bus 15 |
| 5 | +DPB1 | IN/OUT | +Data Bus Parity (odd Parity) |
| 6 | GND | - | Ground |
| 7 | +DB0 | IN/OUT | +Data Bus 0 |
| 8 | +DB1 | IN/OUT | +Data Bus 1 |
| 9 | +DB2 | IN/OUT | +Data Bus 2 |
| 10 | +DB3 | IN/OUT | +Data Bus 3 |
| 11 | +DB4 | IN/OUT | +Data Bus 4 |
| 12 | +DB5 | IN/OUT | +Data Bus 5 |
| 13 | +DB6 | IN/OUT | +Data Bus 6 |
| 14 | +DB7 | IN/OUT | +Data Bus 7 |
| 15 | +DPB | IN/OUT | +Data Bus Parity (odd Parity) |
| 16 | DIFFSENSE | ? | ? |
| 17 | TERMPWR | IN/OUT | Termination Power |
| 18 | TERMPWR | IN/OUT | Termination Power |
| 19 | RES | - | Reserved |
| 20 | +ATN | IN | +Attention |
| 21 | GND | - | Ground |
| 22 | +BSY | IN/OUT | +Bus is busy |
| 23 | +ACK | IN | +Acknowledge |
| 24 | +RST | IN/OUT | +Reset |
| 25 | +MSG | OUT | +Message |
| 26 | +SEL | IN/OUT | +Select |
| 27 | +C/D | OUT | +Control or Data |
| 28 | +REQ | OUT | +Request |
| 29 | +I/O | OUT | +In/Out |
| 30 | GND | - | Ground |
| 31 | +DB8 | IN/OUT | +Data Bus 8 |
| 32 | +DB9 | IN/OUT | +Data Bus 9 |
| 33 | +DB10 | IN/OUT | +Data Bus 10 |
| 34 | +DB11 | IN/OUT | +Data Bus 11 |
| 35 | -DB12 | IN/OUT | -Data Bus 12 |
| 36 | -DB13 | IN/OUT | -Data Bus 13 |
| 37 | -DB14 | IN/OUT | -Data Bus 14 |
| 38 | -DB15 | IN/OUT | -Data Bus 15 |
| 39 | -DPB1 | IN/OUT | -Data Bus Parity (odd Parity) |
| 40 | GND | - | Ground |
| 41 | -DB0 | IN/OUT | -Data Bus 0 |
| 42 | -DB1 | IN/OUT | -Data Bus 1 |
| 43 | -DB2 | IN/OUT | -Data Bus 2 |
| 44 | -DB3 | IN/OUT | -Data Bus 3 |
| 45 | -DB4 | IN/OUT | -Data Bus 4 |
| 46 | -DB5 | IN/OUT | -Data Bus 5 |
| 47 | -DB6 | IN/OUT | -Data Bus 6 |
| 48 | -DB7 | IN/OUT | -Data Bus 7 |
| 49 | -DPB | IN/OUT | -Data Bus Parity (odd Parity) |
| 50 | GND | - | Ground |
| 51 | TERMPWR | IN/OUT | Termination Power |
| 52 | TERMPWR | IN/OUT | Termination Power |
| 53 | RES | - | Reserved |
| 54 | -ATN | IN | -Attention |
| 55 | GND | - | Ground |
| 56 | -BSY | IN/OUT | -Bus is busy |
| 57 | -ACK | IN | -Acknowledge |
| 58 | -RST | IN/OUT | -Reset |
| 59 | -MSG | OUT | -Message |
| 60 | -SEL | IN/OUT | -Select |
| 61 | -C/D | OUT | -Control or Data |
| 62 | -REQ | OUT | -Request |
| 63 | -I/O | OUT | -In/Out |
| 64 | GND | - | Ground |
| 65 | -DB8 | IN/OUT | -Data Bus 8 |
| 66 | -DB9 | IN/OUT | -Data Bus 9 |
| 67 | -DB10 | IN/OUT | -Data Bus 10 |
| 68 | -DB11 | IN/OUT | -Data Bus 11 |
Notes
- Direction is Device relative Bus (other Devices).
- For more informations, references and sources go to SCSI Technology