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Microcontroller · Development Board
Seeed Studio XIAO nRF54L15
XIAO on Nordic's nRF54L15, with Bluetooth LE, Thread, Zigbee, and Matter support.
- GPIO
- I2C
- SPI
- UART
- ADC
- PWM
- USB
- Bluetooth
- Zigbee
- Thread
- SWD
- Processor
- Nordic nRF54L15 (M33 + RISC-V)
- Logic
- 3.3 V GPIOTreat as not 5 V tolerant
- Power
- USB-C, battery pads, 5 V/3.3 V pins
- Format
- Tiny castellated module (21 x 17.8 mm)
Before you wire
4 cautions- 3.3 V GPIO; the 5 V pad is USB power, not a logic level.
- USB goes through an onboard SAMD11 bridge; the nRF54L15 has no native USB.
- On the Sense variant, back pads D11/D12 (P0.03/P0.04) are the onboard IMU's I2C bus.
- P1.02/P1.03 are the NFC antenna pads; P2.03/P2.05 control the RF switch.
Pin map
Connector
XIAO 14 castellated pads
USB-C at top, component side up, 7 pads down each long edge
Simplified technical illustration. Pin data is source-backed; verify against the linked documentation before wiring.
Pin
Hover, tap, or arrow to a pad to inspect it.
- USB-C at top, component side up; labels follow Seeed's XIAO nRF54L15 pin map, schematic, and the Zephyr xiao_d connector map.
- The nRF54L15 runs from the board's VSYS_3V3 rail.
- Back-side pads D11-D15, SWD, and NFC are not shown on this 14-pad map.
All 14 pins (table)
| # | Signal | Role | Net | Also / notes |
|---|---|---|---|---|
| 1 | ADC | P1.04 / AIN0 | ||
| 2 | ADC | P1.05 / AIN1 | ||
| 3 | ADC | P1.06 / AIN2 | ||
| 4 | ADC | P1.07 / AIN3 | ||
| 5 | I2C | I2C | P1.10 | |
| 6 | I2C | I2C | P1.11 | |
| 7 | UART | UART | P2.08 | |
| 14 | Power | 5V | ||
| 13 | Ground | GND | ||
| 12 | Power | 3V3 | ||
| 11 | SPI | SPI | P2.02 | |
| 10 | SPI | SPI | P2.04 | |
| 9 | SPI | SPI | P2.01 | |
| 8 | UART | UART | P2.07 |
Revision notes
- On the Sense variant, back pads D11/D12 (P0.03/P0.04) are the onboard IMU's I2C bus.
Source references
Why it matters
- 128 MHz Cortex-M33 application core plus a 128 MHz RISC-V (FLPR) coprocessor.
- Programmed through nRF Connect SDK / Zephyr; an onboard SAMD11 provides USB and SWD.
- A Sense variant adds an IMU and a PDM microphone.
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