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RTOS/MSP432P401R: UART max baud rate simplelink

miha
Intellectual 960 points

Part Number: MSP432P401R

Tool/software: TI-RTOS

Hi,

I would like to ask what is the max. baud rate of a MSP432 ?

I've got up to 921600 while testing but if I try this speed connected to a external modem it is not working as it should and I don't know if the problem is the uart or data processing speed.
My starting project is powersleep.

Thank you
Miha

  • 0
    TI__Guru 69541 points

    Dear Miha,

     There are a couple of things to consider for the maximum signaling rate.  First is the maximum baud rate provided in the datasheet:

    The second is to consider the error rate which the application can withstand:

    Beyond these typical rates you can use the equation also found in the TRM

    Can you test by either increasing the processing speed or slowing the uart communication to see what the issue is?

    Regards,

    Chris

  • 0 in reply to Chris Sterzik
    Intellectual 960 points
    Hi Chris,

    If I lower the baud rate to 460800 I communicate with the module smoothly.

    Can you please explain me the table 5.35?

    thank you
  • 0 in reply to miha
    Intellectual 960 points
    Hi Chris,

    So if I understand correctly it is possible to go to higher speed but there are more errors, therefore useless?

    Thank you
  • 0 in reply to miha
    TI__Guru 69541 points

    Hello,

        Given that the maximum 'typical' baud rate found in table 22-5 is 460800 Baud, there will be challenges going faster.  The increased error rate can be addressed by including checksums or other means of verifying an error free transmission and then retrying but this would decrease the overall effective baud rate.  

    Regards,

    Chris

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