STM32G431KB schematic review

[stfarmer]

Hi,

I am a hobbyst, and my goal is to create a development board with

- STM32431KB MCU

- LED status lights using high efficiency leds to eliminate the needs of hex latches

- USB-C connector for power and USB UART CH340N

- Standalone 5V input using APS2112K-3.3

- BLE UART Bridge based on CH9141K with u.FL/IPX antenna

I got this far, and I am not sure what else would I need to program the MCU.

I don't have too much experiences with PCB design and none with this microcontroller family.

Any feedback would be greatly appreciated. Thank You!

[Pavel A.]

Here you can find help with schematic and PCB review and programming your STM32.

[TDK]

You'll need a programmer and a way to program and debug the board.

I'd recommend the STLINK-V3MINIE | Tool - STMicroelectronics

Put a FTSH‑107‑01‑L‑D or equivalent header down on the board and connect the GND/SWDIO/SWCLK/VCC pins.

Otherwise the schematic seems okay, apart from the BLE stuff which I make no judgement on.

[Mike_ST]

Hello,

It seems like uC_RX uc_TX signals are going to more than 2 peripherals. not sure that can work. Maybe to use a different UART for each peripheral. I like to drive the LEDs with an Open Drain I/O as well.

[stfarmer]

This was one of the main design idea, to make the UART accessible transparently both via wired and wireless conenction.

I can easily develop an communicate with the board using wires on the bench, but it might be chellenging to get access to it in-situ, therefore the BLE UART bridge.

I am thinking about addig an additional W25Q80 flash chip to the game to be able to store bigger amount of data.

[Mike_ST]

Hello,

My meaning is that you have multiple drivers of the uC_RX line, you might have electrical conflict.

UART is point to point (i.e communication between 2 devices).