MSP430F67471A: UART communication at 750kbps

Probably not. The "A" in "UART" stands for "asynchronous", which means that both transmitter and receiver must have their own clocks that match. And the DCO is not very precise, and the FLL introduces jitter. And 8 MHz cannot be exactly divided down to 750 kHz.

Can't you use a synchronous protocol like SPI?

Uchida-K said:

Part Number: MSP430F67471A

Is it possible to realize 750kbps UART communication using SMCLK sourced from 8MHz FLL DCO referenced 32.768kHz crystal ?

There are some MSP baudrate web calculators that will display BR divider and error. So you can check all possible combination.

MSP430F5xx/6xx with 8 MHz sourced from XT2 can work with UART on 1 Mbps.

Clemens Ladisch said:

And 8 MHz cannot be exactly divided down to 750 kHz.

Chosing another DCO frequency always shall be considered as an option. 12MHz or 24MHz for instance.

Uchida-K said:

I am going to use it as an example and also waiting for TI's comment.

Note that this is "free for all" forum, many "TI employees" writing here are just interns, so your mileage of "TI's comment" can vary :)

Hi ilmars,

Thank you for your advice.

I'll try to explore this solution with reference to advices from everyone.

First, I will try to confilm that it is possible to down this boudrate, or raise DCO frequency.

please let me know if you have other solutions.

Best   regards,

uchida-k