Specifications

• MCU: STM32G474CE, 170MHz Cortex-M4 , 512KB Flash
• IMU: ICM42688-P
• Baro: SPL06
• Blackbox: 128MB Flash (1G-bit NAND)
• 3.5x UARTs (full UART1/UART3/UART4, and UART2_Rx)
• 6x PWM (4x Servos, 1x Motors, RPM)
• 1x ADC (VBAT sense)
• No I2C pad breakout
• USB Type-C(USB2.0)

Electrical characteristics

• Input voltage range: 4.5V~14V on “Vx” pad
• BEC 5V 1.5A output for FC components and peripherals
• Battery Voltage divider 1K:10K (Scale 110)
• Static power: 60mA@5V
• No current sensor integrated.

Physical

• Dimensions: 30 x 23 x H13 mm
• Mounting: 16 x 16mm, Φ4mm with Grommets Φ3mm
• Weight: 9g (w/o pins)
• 3D step file

Including

• 1x G474-HLITE
• 2x 20cm JST-GH-4P to JST-GH-4P cable
• Dupont 2.54 pins  (Board is shipped unsoldered)

Flahing firmware /config

• Rotorflight  / MATEKG474HELI

• Rotorflight configurator 2.x  https://github.com/rotorflight/rotorflight-configurator/releases
• Rotorflight Wiki  https://github.com/rotorflight/rotorflight/wiki
• [Firmware preloaded in factory]   rotorflight_4.3.0_rc2.
• [Flashing with latest RF2 fw]  Select “MATEKG474HELI” target in Rotorflight configurator –> Load firmware (online) –> Flash firmware.
• [Flashing with latest RF2 fw]  Select “STM32G47X” target in Rotorflight configurator –> Load firmware (online) –> Flash firmware.   After flashing and G474-HELI rebooting,  connect G474-HELI to RF configurator,   go into CLI mode,  copy and paste all config lines into CLI,  type “save”,  press ENTER.
• MATEKG474HELI.config

Tips

• There are silicon grommets for vibration damping.  Additional damping is not must.
• No UART2_Tx(Tx2) breakout on this board.
• No “M2” breakout pad on this board, If use it for helicopter with motorised tail rotor,  You can remap sv4(servo 4) to M2(motor 2) by CLI command ” resource SERVO 4 none,  resource motor 2 A06 “
• No “Curr” breakout pad for external current sensor, You can use “Rx2” as current ADC pin. CLI command ” resource SERIAL_RX 2 none,  resource ADC_CURR 1 A03 ”  or use “RPM” pin, CLI command ” resource FREQ 1 none,  resource ADC_CURR 1 B02 ” 
• Due to leakage voltage on MCU I/O, there is floating current readout when no external current sensor connected.  You can ” set current_meter = NONE “, or just ignore it.
• If the FC is mounted with arrow facing backward.   set gyro_1_sensor_align = CW0FLIP 
• Blheli bi-direction Dshot ESC,  enabled RPM filter:  feature rpm_filter