| Pin | Name | Direction | Color | Description |
| 1 | Strobe | Out | | A low on this line indicates a Write, High indicates a Read |
| 2 | Data 0 | IN/OUT | | Address, Data or RLE Data Bit 0 |
| 3 | Data 1 | IN/OUT | | Address, Data or RLE Data Bit 1 |
| 4 | Data 2 | IN/OUT | | Address, Data or RLE Data Bit 2 |
| 5 | Data 3 | IN/OUT | | Address, Data or RLE Data Bit 3 |
| 6 | Data 4 | IN/OUT | | Address, Data or RLE Data Bit 4 |
| 7 | Data 5 | IN/OUT | | Address, Data or RLE Data Bit 5 |
| 8 | Data 6 | IN/OUT | | Address, Data or RLE Data Bit 6 |
| 9 | Data 7 | IN/OUT | | Address, Data or RLE Data Bit 7 |
| 10 | /ACK | In | | Interrupt Line. Interrupt occurs on Positive (Rising) Edge. |
| 11 | BUSY | In | | Used for handshaking. A EPP cycle can be started when low, and finished when high. |
| 12 | Paper Out / End | In | | Spare - Not Used in EPP Handshake |
| 13 | Select | In | | Spare - Not Used in EPP Handshake |
| 14 | Auto Linefeed | Out | | When Low, indicates Data transfer |
| 15 | Error / Fault | In | | Spare - Note used in EPP Handshake |
| 16 | Initialize | OUT | | Reset - Active Low |
| 17 | Select Printer | OUT | | When low, indicates Address transfer |
| 18 | Gnd | | | Signal Ground |
| 19 | GND | | | Signal Ground |
| 20 | GND | | | Signal Ground |
| 21 | GND | | | Signal Ground |
| 22 | GND | | | Signal Ground |
| 23 | GND | | | Signal Ground |
| 24 | GND | | | Signal Ground |
| 25 | GND | | | Signal Ground |