DB-25 parallel connector pinout
| Pin # |
Function
(standard mode) |
Direction |
| 1 | Strobe | OUT |
| 2 | Data Bit 0 | OUT |
| 3 | Data Bit 1 | OUT |
| 4 | Data Bit 2 | OUT |
| 5 | Data Bit 3 | OUT |
| 6 | Data Bit 4 | OUT |
| 7 | Data Bit 5 | OUT |
| 8 | Data Bit 6 | OUT |
| 9 | Data Bit 7 | OUT |
| 10 | ACK | IN |
| 11 | Busy | IN |
| 12 | PE (Paper End) | IN |
| 13 | SLCT | IN |
| 14 | Auto Feed | OUT |
| 15 | Error | IN |
| 16 | Init | OUT |
| 17 | SLCT IN | OUT |
| 18 | Ground | - |
| 19 | Ground | - |
| 20 | Ground | - |
| 21 | Ground | - |
| 22 | Ground | - |
| 23 | Ground | - |
| 24 | Ground | - |
| 25 | Ground | - |
Looking for parallel port low level C++ programming example ?
Download Unified IO and check out the class ParallelPort.
It contains example of using PC parallel port to control Digital IO.
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