GPIB (IEEE 488.1) is the 24-pin parallel bus for controlling oscilloscopes, signal generators, and spectrum analyzers from computers at up to 8 MB/s.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | DIO1 | Data bit 1 | I/O |
| 2 | DIO2 | Data bit 2 | I/O |
| 3 | DIO3 | Data bit 3 | I/O |
| 4 | DIO4 | Data bit 4 | I/O |
| 5 | EOI | End or identify | I/O |
| 6 | DAV | Data valid | I/O |
| 7 | NRFD | Not ready for data | I/O |
| 8 | NDAC | Not data accepted | I/O |
| 9 | IFC | Interface clear | I/O |
| 10 | SRQ | Service request | I/O |
| 11 | ATN | Attention | I/O |
| 12 | SHIELD | Cable shield | GND |
| 13 | DIO5 | Data bit 5 | I/O |
| 14 | DIO6 | Data bit 6 | I/O |
| 15 | DIO7 | Data bit 7 | I/O |
| 16 | DIO8 | Data bit 8 | I/O |
| 17 | REN | Remote enable | I/O |
| 18-24 | GND | Ground wires | GND |