XIAO RA4M1

The board as it appears on the Velxio canvas, with its full pin map read live from the simulator (regenerated by scripts/gen-boards.mjs, so it always matches what you can wire).

Family: Pro boards · Languages: Arduino C++

About this board

The Renesas RA4M1 — the same MCU as the Arduino UNO R4 Minima — in the XIAO footprint, with a 12-bit DAC on A0. The in-browser engine boots the firmware Seeed’s Renesas core produces; Serial is the USB CDC port and Serial1 sits on D6/D7.

Start here

• Blink — the shortest check that the board and toolchain work.
• OLED over I2C — an SSD1306 on the header pins.
• Knob and button — analog in, digital in, an LED out.

Pins (25)

• 14
• D0
• 0
• D1
• 1
• D2
• 2
• D3
• 38
• D4
• 16
• D5
• 50
• D6
• 5V
• GND
• 3V3
• 25
• D10
• 26
• D9
• 27
• D8
• 49
• D7

Every pin above is clickable on the canvas — click one to start a wire. Board-level behavior, quirks and example links live on the family page.