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The fourth analog channel is internal connected to the internal temperature sensor. But only three analog channels are exposed to pinout. It supports four 12-bit SAR based analog to digital converters. Note: The Raspberry Pi Pico’s GPIOs are connected to the on-board 3.3V rail and are therefore fixed at 3.3V.
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Positive edge ( transition from active low to active high).GPIO Interrupt PinsĪll GPIO pins can be configured as an external interrupt pin on the following four changes on the state of GPIO pins: These 26 GPIO pins can be used both in digital input and digital output mode.
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GP26, GP27, and GP28 are the next digital pins available. GP23, GP24, and GP25 are not exposed on the pinout. These digital pins are marked as GP0, GP1, and up to GP22. Out of these 26 pins, 23 pins are digital pins, and only 3 pins have analog read capability. Raspberry Pi Pico exposes 26 multi-function GPIO pins from a total of 36 GPIO pins available in RP2040 microcontroller. Now let’s see the pin configuration details of all peripherals which are supported by the Raspberry Pi Pico development board: GPIO Pins But only one alternate function can be used at a time. For example, GP0 and GP1 pins can be used as digital input, digital output, I2C0 ( SDA and SCK pins), UART0 ( Rx and Tx). It is a 21×51 ‘DIP’ style 1mm thick PCB.Īll GPIO pins have multiple functions. The color marking at the bottom end of this pinout diagram shows Power, ground, UART, GPIO, PWM, ADC, SPI, I2C, system control, and Debugging pins. It provides a total of 40 pins including, 26 GPIO pins, eight GND, 3 debugging, and Vcc pins. The following picture shows the pinout diagram of the Raspberry Pi Pico development board.