The Raspberry Pi Pico is a microcontroller development board built by the same makers of the Raspberry Pi. As seen in the Raspberry Pi Pico pinout diagram below, it has 40 GPIO pins with 3 analog inputs. It features the RP2040, a 32-bit dual ARM cortex M0+ microcontroller chip with a processing speed of 133 Mhz. The Raspberry Pi Pico is just one of many dev boards featuring the RP2040.
The Pico can run code either through CMAKE , Arduino IDE, or Python. Its pins are at a 3.3V level, just like most ARM-based microcontrollers.
Raspberry Pi Pico Pinout Description
Multiple pins for the Pico have multiple functions. In general, you can categorize the pin functions as GPIO, UART, I2C, ADC, or SPI.
General Purpose Pins
[one_fifth]Pin Name[/one_fifth][one_fifth]UART?[/one_fifth][one_fifth]I2C?[/one_fifth][one_fifth]SPI?[/one_fifth][one_fifth_last]ADC?[/one_fifth_last]
[one_fifth]GPIO0[/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth_last][/one_fifth_last]
[one_fifth]GPIO1[/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth_last][/one_fifth_last]
[one_fifth]GPIO2[/one_fifth][one_fifth][/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth_last][/one_fifth_last]
[one_fifth]GPIO3[/one_fifth][one_fifth][/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth_last][/one_fifth_last]
[one_fifth]GPIO4[/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth_last][/one_fifth_last]
[one_fifth]GPIO5[/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth_last][/one_fifth_last]
[one_fifth]GPIO6[/one_fifth][one_fifth][/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth_last][/one_fifth_last]
[one_fifth]GPIO7[/one_fifth][one_fifth][/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth_last][/one_fifth_last]
[one_fifth]GPIO8[/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth_last][/one_fifth_last]
[one_fifth]GPIO9[/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth_last][/one_fifth_last]
[one_fifth]GPIO10[/one_fifth][one_fifth][/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth_last][/one_fifth_last]
[one_fifth]GPIO11[/one_fifth][one_fifth][/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth_last][/one_fifth_last]
[one_fifth]GPIO12[/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth_last][/one_fifth_last]
[one_fifth]GPIO13[/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth_last][/one_fifth_last]
[one_fifth]GPIO14[/one_fifth][one_fifth][/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth_last][/one_fifth_last]
[one_fifth]GPIO15[/one_fifth][one_fifth][/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth_last][/one_fifth_last]
[one_fifth]GPIO16[/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth_last][/one_fifth_last]
[one_fifth]GPIO17[/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth_last][/one_fifth_last]
[one_fifth]GPIO18[/one_fifth][one_fifth][/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth_last][/one_fifth_last]
[one_fifth]GPIO19[/one_fifth][one_fifth][/one_fifth][one_fifth]✓[/one_fifth][one_fifth]✓[/one_fifth][one_fifth_last][/one_fifth_last]
[one_fifth]GPIO20[/one_fifth][one_fifth][/one_fifth][one_fifth]✓[/one_fifth][one_fifth][/one_fifth][one_fifth_last][/one_fifth_last]
[one_fifth]GPIO21[/one_fifth][one_fifth][/one_fifth][one_fifth]✓[/one_fifth][one_fifth][/one_fifth][one_fifth_last][/one_fifth_last]
[one_fifth]GPIO22[/one_fifth][one_fifth][/one_fifth][one_fifth][/one_fifth][one_fifth][/one_fifth][one_fifth_last][/one_fifth_last]
[one_fifth]GPIO26[/one_fifth][one_fifth✓][/one_fifth][one_fifth][/one_fifth][one_fifth][/one_fifth]✓[one_fifth_last][/one_fifth_last]
[one_fifth]GPIO27[/one_fifth][one_fifth]✓[/one_fifth][one_fifth][/one_fifth][one_fifth][/one_fifth]✓[one_fifth_last]✓[/one_fifth_last]
[one_fifth]GPIO28[/one_fifth][one_fifth][/one_fifth][one_fifth][/one_fifth][one_fifth][/one_fifth][one_fifth_last]✓[/one_fifth_last]
Power Pins
The Pico runs on 3.3 V logic levels. While VBUS is generally 5 V, it is not recommended to power other devices from it.
[one_third]Pin Name[/one_third][one_third]Pin Number(s)[/one_third][one_third_last]Description[/one_third_last]
[one_third]3.3 V[/one_third][one_third]36[/one_third][one_third_last]3.3V Power Source[/one_third_last]
[one_third]3.3 V EN[/one_third][one_third]37[/one_third][one_third_last]SMPS/Regulator enable pin. Shorting this to ground disables 3.3 V output and also turns off the Pico[/one_third_last]
[one_third]RUN[/one_third][one_third]30[/one_third][one_third_last]RP2040 enable pin. Shorting this to ground resets the RP2040[/one_third_last]
[one_third]VBUS[/one_third][one_third]40[/one_third][one_third_last]The microUSB input voltage, usually 5V [/one_third_last]
[one_third]VSYS[/one_third][one_third]39[/one_third][one_third_last]System voltage used by the SMPS/Regulator to provide 3.3V to RP2040. Can be between 1.8V to 5.5V[/one_third_last]
[one_third]GND[/one_third][one_third]3,8,13,18,33,28,23[/one_third][one_third_last]Ground[/one_third_last]
[one_third]ADC_VREF[/one_third][one_third]35[/one_third][one_third_last]Reference voltage for the analog-to-digital converter[/one_third_last]
SWD Pins
The SWD pins are used to reprogram the Raspberry Pi Pico's flash memory or for interactive code debugging.
[one_half]Pin Name[/one_half][one_half_last]Description[/one_half_last]
[one_half]SWDIO[/one_half][one_half_last]SWD data pin[/one_half_last]
[one_half]SWCLK[/one_half][one_half_last]SWD clock pin[/one_half_last]
[one_half]GND[/one_half][one_half_last]Ground pin[/one_half_last]
Raspberry Pi Pico Schematic
