| GPIO Name | Peripheral | Alternate |
|---|---|---|
| PB 00 | - | - |
| PB 01 | - | - |
| PB 02 | Push Buttons | EXTINT_6 |
| PB 03 | Push Buttons | EXTINT_7 |
| PB 04 | USART interface | CTS |
| PB 05 | USART interface | RTS |
| PB 06 | Joystick | SCAN_4 |
| PB 07 | Joystick | SCAN_5 |
| PB 08 | Joystick | SCAN_6 |
| PB 09 | Joystick | SCAN_7 |
| PB 10 | - | - |
| PB 11 | - | - |