Hardware design for NxPX4

NxtPx4 is designed by HKUST UAV-Group and tested and maitened with HKU Mars-Lab and SYSU Hi-Lab

NxtPx4_Pro version () has 9v 2.5A and 5V 3A peak power output

NxtPx4 version has 5V 3A power output

NxPx4_Pro/xxx_Vx.x.x_Release：KICAD project

• xxxxxxx_production: manufact files for JLC
• project_lib: Footprint lib and Symble lib for project

27mm x 29mm x 8mm

• MCU STM32H743VIH
• IMU

  IMU	SPI BUS
  ICM20649	SPI1
  ICM-42688-P	SPI2
  BMI088	SPI3

• Baro BMP388
• TF-card: SDMMC1
• External Flash: QSPI

• 6-CH Dshot 600 support
• UART tty-port serial-name mapping

  UART	TTY	SerialName	Suggest Funcion
  USART1	/dev/ttyS0	SERIAL_GPS1	AUX
  USART2	/dev/ttyS1	SERIAL_GPS2	AUX
  USART3	/dev/ttyS2	SERIAL_TEL1	ESC report
  UART4	/dev/ttyS3	SERIAL_TEL2	Connect with offboard computer
  UART5	/dev/ttyS4	SERIAL_RC	Receiver
  UART7	/dev/ttyS5	SERIAL_TEL3	AUX

• I2C2|SPI4 available
• Aux 2 PWM channel available (Heater & RGB & Buzzer control signal)
• Buzzer- available
• Aux 2 GPIO Available

for more information please reffer to /STM32H743VI_Pin_Out/STM32H743xxx_Pin_out.xlsx

In the v1.0.1 design, the original concept was to create an unusual ESC connector in order to prompt users to notice the pinout sequence. However, in practice, the placement of the Rx pin in close proximity to the Vbat pin resulted in MCU damage during power on/off if the cable was not tightly installed (causing a high voltage spark). Realizing this issue, the v1.1.0 design changed the ESC pinout order to address this problem.

If you are using v1.0.1 of the NxtPX4 flight controller (which can be found at the back of the PCB), it is important to pay attention to your connection with the ESC. Specifically, it is recommended that you do not disconnect or connect the NxtPX4 while the ESC is already powered on, as this can cause damage to the flight controller. (v1.0.1 Design)

(v1.1.0)