| Pin | FT | A Assignment | FT | B Assignment |
|---|---|---|---|---|
| 0 | Rotary CLK | |||
| 1 | Rotary DAT | |||
| 2 | Rotary SW | Y | NA (BOOT1) | |
| 3 | Y | Amiga KB_DAT | ||
| 4 | Y | Amiga KB_CLK | ||
| 5 | SPI1.SCK | |||
| 6 | Y | I2C SCL | ||
| 7 | Disp.Out.SPI1 | Y | I2C SDA | |
| 8 | Y | CSYNC/HSYNC | Y | User Out (U0) |
| 9 | Y | Serial Tx | Y | User Out (U1) |
| 10 | Y | Serial Rx | Y | User Out (U2) |
| 11 | Y | Y | Atari KB | |
| 12 | Y | Y | ||
| 13 | Y | NA (SWDIO) | Y | SPI2.SCK |
| 14 | Y | NA (SWCLK) | Y | VSYNC |
| 15 | Y | Disp.Enable | Y | Disp.Out. (RGB) |