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Compact development board based on the RP2350A microcontroller, supporting dual Arm Cortex-M33 or dual Hazard3 RISC-V cores running at up to 150MHz. Features 520KB SRAM, 2MB Flash, two female USB-C ports including a dedicated PIO-USB interface, and 15 GPIO connections. Supports SPI, I2C, UART, ADC, PWM, and development with C/C++, MicroPython, and Arduino. Castellated PCB edges allow direct soldering onto custom carrier boards. Waveshare RP2350-USB-C
The Waveshare RP2350-USB-C development board features an RP2350A microcontroller designed by Raspberry Pi. The device can operate with two Arm Cortex-M33 cores or two Hazard3 RISC-V cores running at up to 150MHz, with the processor architecture selected through software. It provides 520KB SRAM and an external 2MB NOR Flash chip. Its compact design supports the development of USB devices, control interfaces, communication adapters, and small embedded systems.
The board features two female USB-C connectors. The first uses the RP2350A hardware USB 1.1 controller for power, programming, and host or device communication. The second connector provides PIO-USB, allowing an additional USB interface to be implemented using programmable I/O resources. PIO-USB operation requires suitable firmware, while configurable CC resistors support different USB-C source and sink roles. The additional interface is suitable for experimenting with USB peripherals and custom USB communication implementations.
The microcontroller exposes 15 GPIO connections, two SPI controllers, two I2C controllers, two UARTs, four 12-bit ADC channels, and 14 PWM channels available on the board. Twelve programmable I/O state machines support custom communication protocols and accurate signal timing. Additional hardware includes a WS2812 RGB LED, BOOT and RUN buttons, an internal temperature sensor, and a 3.3V LDO regulator. Software can be developed in C/C++, MicroPython, and Arduino, with drag-and-drop firmware loading through USB mass storage mode.
The board measures 17.5 × 33mm and features castellated edges for direct soldering onto custom PCBs. The offered Waveshare 34641 version provides a female PIO-USB-C connector. The RP2350-USB-CM version with a male PIO-USB connector is sold separately. The RP2350A does not integrate Wi-Fi or Bluetooth connectivity.

The RP2350-USB-C version with a female PIO-USB connector is shown on the left. The RP2350-USB-CM version with a male connector is shown on the right for comparison and is not included.
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