multi drop

[Zeevi.Ariel]

Does the STM32F7 supports the USART multi drop mode ?

[Tesla DeLorean]

Do you mean a single-wire/RS485 type thing, or a 9-bit multi-processor/8051 mode?

[Zeevi.Ariel]

i mean the 9 bit multi processor/8051 mode.

[Tesla DeLorean · Accepted solution]

Yes, the STM32 has a 9-bit mode, and I think some have an address matching functionality. It is not a mode I use, but I think it is covered in the reference manual

[Zeevi.Ariel]

Thanks for your answer. I know there is option of 9 bits, but it seems that the chip I use STM32F767II does not support the address matching functionality. What we did, we add the sign of address byte manually to the first byte of each message.