| Function | pico, pico2 | vgaboard |
| --- | --- | --- |
| UART TX | GPIO 0 (UART0) | GPIO 20 (UART1) |
| UART RX | GPIO 1 (UART0) | GPIO 21 (UART1) |
| SD SPI CS | N/A | GPIO 22 |
| SD SPI MOSI | N/A | GPIO 18 |
| SD SPI MISO | N/A | GPIO 19 |
| SD SPI CLK | N/A | GPIO 5 |
| PIO & DMA | N/A | 1 SM, 2 DMA |