MCU: STM32L431xC, 256KB Flash
CAN transceiver data rates up to 5 Mbit/s in the CAN FD fast phase
1x CAN, DroneCAN Protocol (2x GH-4P connectors in parallel)
3x UARTs
UART1, spare
UART2, MSP default, DFU
UART3, GPS default
1x I2C for peripheral Airspeed sensor/peripheral Barometer/peripheral Compass QMC5883L
1x SPI for peripheral RM3100
4x ADC (BATT_VOLT, PIN 5, BATT_CURR, PIN 6, BATT2_VOLT, PIN 15, BATT2_CURR, PIN 16)
5x PWM outputs
1x GPIO with TIM16 for buzzer
ST debug, SWCLK & SWDIO
LED definition:
Blue, Fast blinking, Booting
Blue, Slow blinking, working
Red, 3.3V indicator
Input voltage range: 4.5~5.5V @5V pad/pin
Power consumption: 40mA
Operating Temperatures: -20~80 °C

Physical
2x JST-GH-4P(SM04B-GHS-TB) for CAN
1x JST-GH-4P(SM04B-GHS-TB) for I2C
1x JST-GH-6P(SM06B-GHS-TB) for UART3+I2C
Board Size: 26mm*26mm*6mm. 3.7g

Firmware
ArduPilot AP_Periph MatekL431-Periph, or MatekL431-Airspeed
Update via DroneCAN GUI Tool
Package includes:
1x CAN-L431 board
1x JST-GH-4P to JST-GH-4P 20cm silicon wire
1x JST-GH-6P to JST-GH-6P 20cm silicon wire