| Pin | Name | Description |
|---|---|---|
| 1 | VCC | +5 VDC |
| 2 | ? | ? Connected on Game Boy, but not used on Game Paks. |
| 3 | /RESET | Reset |
| 4 | /WR | Write |
| 5 | ? | ? Used by paging PAL on high capacity Game Paks. |
| 6 | A0 | Address 0 |
| 7 | A1 | Address 1 |
| 8 | A2 | Address 2 |
| 9 | A3 | Address 3 |
| 10 | A4 | Address 4 |
| 11 | A5 | Address 5 |
| 12 | A6 | Address 6 |
| 13 | A7 | Address 7 |
| 14 | A8 | Address 8 |
| 15 | A9 | Address 9 |
| 16 | A10 | Address 10 |
| 17 | A11 | Address 11 |
| 18 | A12 | Address 12 |
| 19 | A13 | Address 13 |
| 20 | A14 | Address 14 |
| 21 | /CS | Chip Select |
| 22 | D0 | Data 0 |
| 23 | D1 | Data 1 |
| 24 | D2 | Data 2 |
| 25 | D3 | Data 3 |
| 26 | D4 | Data 4 |
| 27 | D5 | Data 5 |
| 28 | D6 | Data 6 |
| 29 | D7 | Data 7 |
| 30 | /RD | Read |
| 31 | ? | ? Connected on Game Boy, but not used on Game Paks. |
| 32 | GND | Ground |
