Loading source-backed pinouts…
Linux SBC · SBC
Arduino UNO Q
UNO-footprint board pairing a Debian-capable Qualcomm MPU with an STM32U585 real-time MCU.
- GPIO
- I2C
- SPI
- UART
- ADC
- DAC
- PWM
- CAN
- USB
- Wi-Fi
- Bluetooth
- CSI
- Processor
- Qualcomm QRB2210 + STM32U585
- Logic
- 3.3 V MCU headers; 1.8 V MPUTreat as not 5 V tolerant
- Power
- USB-C 5 V / 3 A, 7-24 V VIN, or 5 V on 5V_SYS
- Format
- UNO-format board with 60-pin bottom connectors
Before you wire
9 cautions- JDIGITAL lines are 3.3 V outputs. Most are 5 V-tolerant only as inputs; D3 (PB0) is 3.6 V-tolerant and must never see 5 V in any mode.
- A0-A5 are not 5 V-tolerant when used as ADC or any analog function; keep them at or below VDD + 0.3 V.
- JANALOG pin 1 is the MCU BOOT0 strap where a classic UNO header has NC; check that a shield leaves that position unconnected.
- IOREF mirrors the 3.3 V rail and is output only; do not back-feed it.
- JMEDIA, JCTL, and the MPU lines on JMISC are 1.8 V. Level-shift before joining them to the 3.3 V MCU side.
- The JCTL SE4 UART is the Linux system console and should not be repurposed for user I/O.
- USB-C DisplayPort and JMEDIA MIPI-DSI share one signal; only one display output can be active.
- USB Power Delivery requests only 5 V / 3 A; use a supply and cable rated for it.
- This map covers JDIGITAL and JANALOG only. JSPI (PC2 MISO, PC3 MOSI, PD1 SCK), Qwiic (PD13 SDA, PD12 SCL), and the 60-pin JMISC/JMEDIA connectors are not drawn.
Pin map
Connector
UNO-style JDIGITAL (18-pin) and JANALOG (14-pin) headers
Component side up, shield headers along the long edges
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.
- Positions are the datasheet's JDIGITAL1 and JANALOG1 pin numbers; MCU pins are STM32U585 ports.
- All JDIGITAL and JANALOG signals are 3.3 V STM32U585 I/O. The 1.8 V MPU lines are on JMISC, JMEDIA, and JCTL, not on these headers.
- D20/D21 next to AREF carry I2C2; A4/A5 can instead act as I2C3 (PC1/PC0).
All 32 pins (table)
| # | Signal | Role | Net | Also / notes |
|---|---|---|---|---|
| JDIGITAL | ||||
| 1 | UART | UART | PB7 / USART1_RX | |
| 2 | UART | UART | PB6 / USART1_TX | |
| 3 | GPIO | PB3 | ||
| 4 | PWM | PB0 · 3.6 V max; never 5 V. | ||
| 5 | GPIO | CAN | PA12 / FDCAN1_TX | |
| 6 | PWM | CAN | PA11 / FDCAN1_RX | |
| 7 | PWM | PB1 | ||
| 8 | GPIO | PB2 | ||
| 9 | GPIO | PB4 | ||
| 10 | PWM | PB8 | ||
| 11 | SPI | SPI | PB9 / SPI2_SS | |
| 12 | SPI | SPI | PB15 / SPI2_MOSI | |
| 13 | SPI | SPI | PB14 / SPI2_MISO | |
| 14 | SPI | SPI | PB13 / SPI2_SCK | |
| 15 | Ground | GND | ||
| 16 | Alt | Not a GPIO. | ||
| 17 | I2C | I2C | PB11 / I2C2_SDA | |
| 18 | I2C | I2C | PB10 / I2C2_SCL | |
| JANALOG | ||||
| 1 | System | BOOT0 strap. | ||
| 2 | Power | IOREF | Output only. | |
| 3 | System | MCU_NRST | ||
| 4 | Power | 3V3 | ||
| 5 | Power | 5V | Input or output. | |
| 6 | Ground | GND | ||
| 7 | Ground | GND | ||
| 8 | Power | VIN | 7-24 V input. | |
| 9 | ADC | D14 / PA4 / DAC0 | ||
| 10 | ADC | D15 / PA5 / DAC1 | ||
| 11 | ADC | D16 / PA6 | ||
| 12 | ADC | D17 / PA7 | ||
| 13 | ADC | D18 / PC1 / I2C3_SDA | ||
| 14 | ADC | D19 / PC0 / I2C3_SCL | ||
Revision notes
- UNO-style headers only; JSPI, Qwiic, JMISC, and JMEDIA are not drawn.
Source references
Why it matters
- Quad Cortex-A53 QRB2210 runs Debian; the STM32U585 Cortex-M33 runs the Arduino core on Zephyr.
- The MPU and MCU talk through Arduino Bridge, an RPC layer on both sides.
- UNO-style JDIGITAL/JANALOG headers, plus JSPI and Qwiic, are all driven by the STM32U585.
- Two variants: ABX00162 (2 GB RAM, 16 GB eMMC) and ABX00173 (4 GB RAM, 32 GB eMMC).