Raspberry Pi Pico and Other RP2040 Boards
- OP Controls the on-board SMPS Power Save pin: GP23
- IP VBUS sense - high if VBUS is present, else low: GP24
- LED: GP25
- 26 GPIO pins: GP0 - GP22 (Digital), GP 26 - 28 (Analog)
- Same GPIO: GP0 - GP22
- Extra exposed pin: GP24, GP29
- User Key: GP23
- LED: GP25

- Same GPIO: GP0 - GP22, GP26 - GP28
- Extra exposed pin: GP23 (Used in RGB LED), GP29
- WS2812 RGB LED: GP23
- USER KEY: GP24
- LED: GP25
- With a battery connector
- Adafruit KB2040
- SparkFun Pro Micro - RP2040 - DEV-18288
Other boards can be found at https://forums.raspberrypi.com/viewforum.php?f=147&sid=08057f6df74961143c3af132f24eafc3