If I want to use the serial port to realize communication between two stm32s, how should the hardware be connected?

shijizai

If I want to use the serial port to realize communication between two stm32s, how should the hardware be connected? [Copy link]

The serial port uses RS422, and the conversion chip uses MAX3490. I don't know how to connect MAX3490 with stm32. Please drop a group of masters to smash me to death

huo_hu

Just connect R0 to RX and DI to TX, and you can check the specific electrical characteristics.

ienglgge

It is explained in the manual. DI Driver Input. This is connected to the MCU serial port sending pin. RO is connected to the MCU serial port receiving pin. For other configuration pins, just pay attention to them.