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:


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. Among them, 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