UART transfer error rate

RE: UART transfer error rate

Susheel Nuguru — Fri, 30 Apr 2021 08:01:27 GMT

I think it depends on

HF clock accuracy you are using
Jitter caused by internal clock division logic as mentioned with the actual baudrate vs selected baudrate shown here

I do not think we have any other data other than that

RE: UART transfer error rate

moon.kim — Fri, 30 Apr 2021 00:48:07 GMT

Hi,

I have seen the following data in the datasheet when using other MCUs.

This shows the error rate that occurs according to the UART setting or clock setting.

However, I can't find this information in the nRF52820's datasheet.
I need this information to set the proper baud rate when using the internal clock.

RE: UART transfer error rate

Susheel Nuguru — Thu, 29 Apr 2021 11:37:31 GMT

[quote user=""]It will be different for each MCU. I would like to know information about the nRF52's UART transfer error rate to set the optimal speed.[/quote]

I am assuming that you are talking about the error rate when NOT using the flow control?

There is no general (or easy) formula for getting the error rate in this case. It depends on application/driver on each side and how fast each side is flooding and consuming the data (given the baudrate is fixed).

What are you trying to achieve here? trying to optimize something based on the known error rate?