Pin Numbering

Understand the Raspberry Pi Pico's pin numbering system and the role of each pin.

By Kevin McAleer,    5 Minutes

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Overview

Welcome to Lesson 2 of the Raspberry Pi Pico with MicroPython - GPIO Mastery course. In this lesson, we will discuss the Raspberry Pi Pico’s pin numbering system and the role of each pin.

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Course Content

In this lesson, you will learn:

• The Raspberry Pi Pico’s pin numbering system
• The role of each pin and how to identify them

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The Raspberry Pi Pico has several types of GPIO pins, including digital I/O, PWM, ADC, I2C, and SPI pins. Each pin has a specific function and can be used to connect different electronic components to the board.

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Raspberry Pi Pico’s Pin Numbering System

The GPIO pins on the Raspberry Pi Pico are numbered from 0 to 29. The pins are arranged in two rows on the board, with the odd-numbered pins on the left row and the even-numbered pins on the right row. The pins are numbered in a way that reflects their basic functions and groupings.

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Identifying Pins on the Raspberry Pi Pico

To identify the pins on the Raspberry Pi Pico, we can refer to the pinout diagram in the datasheet or on the board itself. The pinout diagram shows the function and number of each pin, as well as its physical location on the board.

In addition, the Raspberry Pi Pico has labels on the board that indicate the function of each pin. For example, the pins labeled “GP0” to “GP28” are digital I/O pins, and the pins labeled “ADC0” to “ADC3” are ADC pins.

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Pinouts

Pin Number	Type	Capabilities
GP0	Digital I/O	General purpose I/O, can be used as input or output
GP1	Digital I/O	General purpose I/O, can be used as input or output
GP2	Digital I/O	General purpose I/O, can be used as input or output
GP3	Digital I/O	General purpose I/O, can be used as input or output
GP4	Digital I/O	General purpose I/O, can be used as input or output
GP5	Digital I/O	General purpose I/O, can be used as input or output
GP6	Digital I/O	General purpose I/O, can be used as input or output
GP7	Digital I/O	General purpose I/O, can be used as input or output
GP8	Digital I/O	General purpose I/O, can be used as input or output
GP9	Digital I/O	General purpose I/O, can be used as input or output
GP10	Digital I/O	General purpose I/O, can be used as input or output
GP11	Digital I/O	General purpose I/O, can be used as input or output
GP12	Digital I/O	General purpose I/O, can be used as input or output
GP13	Digital I/O	General purpose I/O, can be used as input or output
GP14	Digital I/O	General purpose I/O, can be used as input or output
GP15	Digital I/O	General purpose I/O, can be used as input or output
GP16	Digital I/O	General purpose I/O, can be used as input or output
GP17	Digital I/O	General purpose I/O, can be used as input or output
GP18	Digital I/O	General purpose I/O, can be used as input or output
GP19	Digital I/O	General purpose I/O, can be used as input or output
GP20	Digital I/O	General purpose I/O, can be used as input or output
GP21	Digital I/O	General purpose I/O, can be used as input or output
GP22	Digital I/O	General purpose I/O, can be used as input or output
GP26	Digital I/O	General purpose I/O, can be used as input or output
GP27	Digital I/O	General purpose I/O, can be used as input or output
GP28	Digital I/O	General purpose I/O, can be used as input or output
GP29	Digital I/O	General purpose I/O, can be used as input or output
GP14	ADC	Analog-to-digital converter input
GP15	ADC	Analog-to-digital converter input
GP16	ADC	Analog-to-digital converter input
GP17	ADC	Analog-to-digital converter input
GP18	PWM	Pulse-width modulation output
GP19	PWM	Pulse-width modulation output
GP20	PWM	Pulse-width modulation output

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Key Results

After you have completed this lesson, you will be familiar with the Raspberry Pi Pico’s pin numbering system. You will be able to identify and locate each pin, which will allow you to correctly connect components and devices to the appropriate pins in your projects.

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