SULILGH743_DX_STM32H743VIH6 flight controller

Project Parameters

: Main Controller: STM32H743VIH6
; Gyroscope: 2 ICM42688_P;
Barometer: MS5611;
Magnetic Compass:
IST8310; : SD Card
; OSD: AE7456;
BEC: Supports 8S 12V1.5A 5V1.5A.

Hardware Details

: Main Controller: STM32H743VIH6; Frequency: 480MHz; Flash: 2048MB; RAM: 1024MB; Uses TFBAG100 package, can accommodate 0.45mm balls, relatively easy to solder with soldering skills
. Gyroscopes: Two ICM42688_P, allowing for more redundancy. Compared to the BMI088

ICM-42688-P, the accelerometer noise density is approximately 60 µg/√Hz, and the gyroscope noise density is approximately 3.1 mdps/√Hz, giving it better performance in short-term angular velocity measurements
. Although its accelerometer has a lower noise density of 40 µg/√Hz, its gyroscope has a noise density of 0.014 °/s/√Hz, making it more accurate in measuring extremely low angular rates (such as small angle changes). However, its high noise density may affect accuracy under high dynamic conditions.
The ICM-42688-P has a data output rate of up to 8kHz, while the BMI088's maximum output rate is only 1.6kHz. A higher data output rate means the ICM-42688-P can capture more data points in a shorter time, thus providing more accurate measurements in fast-moving or high-frequency vibration scenarios. The response may also be more intense, potentially measuring more noise, so vibration damping is crucial.

**BEC: Uses MP4560 with an input voltage of 3.8V-55V.
** **LDO: LP5912: Quiescent current is 12 µA, which is very low among similar LDOs. The dropout voltage at full load (500 mA) is 120 mV. The LP5912 provides ±1% output voltage accuracy. The LP5912 has a PSRR of 70 dB at 1 kHz and maintains a high rejection ratio at higher frequencies (e.g., 10 kHz to 100 kHz). The LP5912's output noise density is 6.5. µVrms (10 Hz to 100 kHz) perform well in this type of LDO and are suitable for applications with stringent low-noise requirements, such as powering high-precision measurement circuits or noise-sensitive sensors. It uses two LP5912 chips, one for sensor power and one for main control power.

Functional interfaces

include: Serial ports: USART1, USART2, USART3, UART4, UART5, USART6, UART7, UART8 . The APM firmware adds synchronization functionality to the USART chip, making it an enhanced version of UART. USART functionality is only used in the APM firmware; other firmware uses UART
. The APM firmware adds USART_RTS and USART_CTS pin functions to USART2 and USART3, allowing connection to ESCs/data transmissions (cross-wiring is required). (This function is used for current limiting, controlling the amount of data sent via the serial port.)
RTS: Used by the MCU to notify the module whether the MCU is ready and whether the module can send information to the MCU. CTS
: Used by the module to notify the MCU whether the module is ready and whether the MCU can send information to the module
. I2C: I2C1, I2C2, I2C3, I2C4. I2C1 connects to the internal magnetic compass, but has solder pads for future connection.
PWM: S1-S10, plus an LED strip S11.
CAN bus: CAN1, CAN2. The CAN bus is an interface for connecting peripherals to the CAN bus under the APM firmware. Commonly used for connecting GPS devices, RTk devices, and galvanometers to the CAN bus, it can also be used as an expansion module for the CAN bus. This expansion module can connect serial devices, I2C devices, and SPI devices.
Analog image transmission: VI image input interface (connects to the camera signal line), VO image output port (connects to the image transmission signal line).
Analog input: CURR (for galvanometer analog signal input), RSSI (for signal strength input, generally used for receiver signal strength interface), and one unused ADC pin that can be configured to connect to an analog airspeed meter (3.3V analog signal, cannot be connected to 6.6V).
Debug interfaces: SWDIO, SWCLK, USB_DM_USB_DP.

[Rendering ,
soldering effect,
wiring diagram
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