Raspberry Pi Debug Probe – USB to serial-debug & UART, 3-pin keyed connector, CMSIS-DAP, multi-platform

Overview

Raspberry Pi Debug Probe is a plug-and-play debug probe that bridges USB to a dedicated serial-debug interface and to an industry‑standard UART interface. Designed for Raspberry Pi Pico, XIAO RP2040, other RP2040-based microcontrollers, and microprocessor-based platforms, it uses a compact, keyed 3‑pin debug connector with a single unidirectional clock pin and a bidirectional data I/O pin. It provides standard CMSIS‑DAP debug and UART interfaces over USB and can also be used as a cost‑effective USB‑to‑UART cable.

Key Features

• All‑in‑one debug probe: bridges USB to dedicated serial debug and industry‑standard UART.
• Plug‑and‑play 3‑pin keyed debug connector; single clock (SC) and bidirectional data (SD).
• Multiple debug platforms supported: Raspberry Pi Pico and RP2040, plus other microcontroller‑ and microprocessor‑based targets.
• Raspberry Pi production quality: based on the Raspberry Pi Pico hardware design and runs the open‑source PicoProbe software.
• Arrangement can support ARM’s Serial Wire Debug (SWD) or cJTAG over SC/SD.

Specifications

Pinout

Note: The UART TX and RX labels are from the target perspective.

What’s Included

Applications

• Debugging Raspberry Pi Pico, RP2040, and other targets via CMSIS‑DAP.
• USB‑to‑UART connection for development, logging, and provisioning.

Documents

• Raspberry Pi Debug Probe Datasheet
• Raspberry Pi 3‑pin Debug Connector Specification
• Open‑source PicoProbe software

Details