Raspberry Pi Pico Board：

1. Introduction：

Raspberry Pi Pico is a low-cost, high-performance microcontroller board with flexible digital interfaces. It integrates the RP2040 microcontroller chip designed by Raspberry Pi, with dual-core Arm Cortex M0+ processor running up to 133 MHz, embedded 264KB of SRAM and 2MB of on-board Flash memory, as well as 26 multi-function GPIO pins. For software development, either Raspberry Pi’s C/C++ SDK, or the MicroPython is available. In this tutorial, we will use MicroPython.

2. Features：

  • RP2040 microcontroller chip designed by Raspberry Pi

  • Dual-core ARM Cortex M0+ processor, flexible clock running up to 133 MHz

  • 264kB of SRAM, and 2MB of on-board Flash memory

  • Castellated module allows soldering direct to carrier boards

  • USB 1.1 Host and device support

  • Low-power sleep and dormant modes

  • Drag & drop programming using mass storage over USB

  • 26 multi-function GPIO pins

  • 2×SPI, 2×I2C, 2×UART, 3×12-bit ADC, 16×controllable PWM channels

  • Accurate on-chip clock and timer

  • Temperature sensor

  • Accelerated floating point libraries on-chip

  • 8×Programmable IO (PIO) state machines for custom peripheral support

3. Parameters：

  • Microcontroller: RP2040 microcontroller chip

  • CPU: Dual-core Arm Cortex-M0+ @ 133MHz

  • USB-to-serial chip: Built-in USB1.1 PHY host and device support, drag-and-drop download program through USB identification as mass storage

  • Working voltage: 3.0V-3.6V

  • Working current: average 80mA

  • Supply current: 500mA

  • External power supply: DC power supply is 6-12V (recommended 9V), USB power supply is 5V.

  • Flash Memory: Built-in 2MB

  • SRAM: Built-in 264KB

  • Integrated crystal oscillator: 12MHz

4. Dimension Diagram：

5. Schematic Diagram：

6. Pin out

PIN

FUNCTION

GND

Ground pin

Power

VBUS(microUSB voltage)
VSYS(2-5VDC input voltage)
3V3(3.3V output voltage)
3V3_EN(Enables Pico)

System Control

run (enable or disable the RP2040 microcontroller or reset)

ADC

Raspberry Pi Pico has a total of 5 ADCs with a resolution of 12 bits,
namely ADC0 (GP26), ADC1 (GP27), ADC2 (GP28), ADC3 (GP29), ADC4.
ADC3 (GP29) is used to measure VSYS on the Pico board;
ADC4 is directly connected to the built-in temperature sensor of RP2040.
ADC_VREF can be connected to an external accurate voltmeter as ADC reference.
The ADC_GND pin serves as the ground reference.

PWM

Raspberry Pi Pico has 16 PWM channels,
each of channel can control frequency and duty cycle.GPIO pin is switched to PWM

UART

Two UART: UART0,UART1

I2C

Two types of I2C: I2C0 I2C1

SPI

Two types of SPI: SPI0,SPI1

Debugging

used in debugging code