UART FIFO depth

[sarun]

Hello good day,

I am using the STM32H755 Nucleo board. In the UART module, how are the FIFOs managed? According to the datasheet, there is one TX FIFO and one RX FIFO.

What is the actual depth of these FIFO?

[Andrew Neil]

Have you checked in the Reference Manual?

In ST's documentation structure, that's usually the place to find such details, rather than the Datasheet.

[sarun]

Hello @Andrew Neil 

Thank you for your response, yes I have gone through reference manual  RM0399, I haven't found anything particular mentioning  FIFO depth

[GwenoleB · Accepted solution]

Hello @sarun ,

The Tx/Rx FIFO depth is 16 bytes according to RM0399 Table 419.

Best Regards,

Gwénolé