RP2040 Breakout Board

Minimal RP2040 breakout with USB Micro-B, 16 MB QSPI flash, and full GPIO headers in a breadboard-friendly form factor.

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Pin Reference

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Specifications

Parameter	Value
MCU	RP2040 (dual-core Arm Cortex-M0+ @ up to 133 MHz)
Flash	16 MB W25Q128JVS (QSPI) or compatible
Supply voltage	5 V via USB Micro-B; 3.3 V via onboard AP1117-33 LDO
Internal 1.1 V rail	Generated by RP2040 internal LDO (VREG)
Clock	12 MHz external crystal
USB	USB Micro-B (power + data)
GPIO headers	2 × 12-pin 2.54 mm (J2, J3)
Status	Tested - fully functional

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Schematic and PCB

Schematic	Board

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Boot & Reset

Control	Component	Behaviour
BOOT	SW1 (USB_BOOT)	Hold while connecting USB to enter USB bootloader (UF2 mode). Pulls QSPI_SS low via R1 (1 kΩ); R2 (47 kΩ) pulls QSPI_SS high normally.
RESET	SW2 (RESET)	Momentarily pulls RUN low. R3 (10 kΩ) holds RUN high during normal operation.

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Manufacturing

Gerber files are in the gerber/ directory, ready to upload to JLCPCB, PCBWay, or equivalent.

Suggested fab settings:

Setting	Value
Layers	4 (F_Cu, In1_Cu, In2_Cu, B_Cu)
Thickness	1.6 mm
Surface finish	HASL (lead-free) or ENIG

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Status

• Designed, not yet ordered
• Ordered — awaiting boards
• Assembled, untested
• Tested and working

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Building / Programming

USB Bootloader (UF2)

# 1. Hold SW1 (BOOT button) and connect USB — board appears as RPI-RP2 mass storage
# 2. Drag and drop a UF2 firmware image
cp firmware.uf2 /media/$USER/RPI-RP2

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License

Licensed under the MIT License