RP2350-USB-C User Guide

Features

Utilizes the RP2350A microcontroller chip designed by Raspberry Pi
Unique dual-core, dual-architecture, featuring dual-core ARM Cortex-M33 processors and dual-core Hazard3 RISC-V processors, both operating at up to 150MHz, allowing users to flexibly switch between the two architectures
Built-in 520KB of SRAM and 2MB of on-chip Flash
Utilizes a Type-C port, eliminating the hassle of plug orientation
USB1.1 host and slave device support
Supports low-power sleep and dormant modes
Drag-and-drop programming using mass storage over USB
15 × multi-function GPIO pins of the RP2350A are brought out
2 × SPI, 2 × I2C, 2 × UART, 4 × 12-bit ADC and 14 × controllable PWM channels
Accurate on-chip clock and timer
Built-in temperature sensor for real-time chip temperature monitoring
12 × programmable I/O (PIO) state machines for custom peripheral support

Onboard Resources

RP2350A Dual-core, dual-architecture processor, up to 150MHz operating frequency
W25Q16JVUXIQ 2MB NOR Flash
PIO-USB CCX pull‑up/pull‑down resistors Supports Sink / Source switching via resistor configuration
PIO-USB For using as a USB host or device via PIO
RT9013-33GB 500mA low dropout, low noise, ultra‑fast LDO
BOOT button Press while resetting to enter download mode
USB Type-C Port For programming, supports USB1.1 host and device
RUN Reset Button For resetting the board
WS2812 Colorful RGB LED

Interface Introduction

Dimensions

Working with MicroPython

This chapter contains the following sections. Please read as needed:

MicroPython Getting Started Tutorial

New to Pico MicroPython development and want to get started quickly? We have prepared a general introductory tutorial for you. These tutorial is designed to help developers quickly become familiar with Thonny IDE and start developing. It covers environment setup, project creation, component usage, and peripheral programming, helping you take the first step in MicroPython programming.

Setting Up the Development Environment

Please refer to the Install and Configure Thonny IDE Tutorial to download and install the Thonny IDE.

Example

The MicroPython examples are located in the examples\MicroPython directory of the example package.

Example	Basic Program Description	Dependency Library
01_RGB	Onboard RGB LED example	-

01_RGB

Example Description

Uses GPIO16 to drive a WS2812B RGB LED via PIO, cycling through colors.

Hardware Connection

Connect the board to the computer using a USB cable.

Operation Result

After flashing, the WS2812B RGB LED continuously fades through red, green, and blue.

Working with C/C++

This chapter contains the following sections. Please read as needed:

Setting Up the Development Environment

Please refer to the Install and Configure Pico C/C++ Development Environment Tutorial to download and install the Pico VSCode.

Example

The C/C++ examples are located in the examples\C directory of the example package.

Example	Basic Program Description	Dependency Library
01_USB	PIO‑USB emulation of USB device/host examples	-
02_RGB	Onboard RGB LED example	-

01_USB

The examples are modified from sekigon-gonnoc's Pico-PIO-USB.
Example version: 0.5.3
PICO SDK version: 2.2.0

Example Description

usb_device
- Example path: examples/usb_device
- Uses PIO‑USB to emulate an HID keyboard/mouse device. After the computer recognizes it, the mouse cursor moves periodically.
host_hid_to_device_cdc
- Example path: examples/host_hid_to_device_cdc
- Uses PIO‑USB as a host to read HID reports from a keyboard/mouse and outputs them to the computer's serial port via native USB CDC.
- Note: When compiling this example, you must comment out the return statements in the file SDK\lib\tinyusb\src\portable\raspberrypi\pio_usb\hcd_pio_usb.c, as shown below:
```
bool hcd_edpt_abort_xfer(uint8_t rhport, uint8_t dev_addr, uint8_t ep_addr) {
  uint8_t const pio_rhport = RHPORT_PIO(rhport);
  // return pio_usb_host_endpoint_abort_transfer(pio_rhport, dev_addr, ep_addr);
}      

uint32_t hcd_frame_number(uint8_t rhport) {
  (void) rhport;
  // return pio_usb_host_get_frame_number();
}  
```

Hardware Connection

Connect the board to the computer using a USB cable

Operation Result

usb_device
PIO‑USB emulates a mouse and moves the mouse cursor every 0.5 seconds.
host_hid_to_device_cdc
Similar to capture_hid_report, prints mouse/keyboard reports from the host port to the device port's CDC.