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TMS320F280025: UART STOP/START interval

rei
Mastermind 6135 points
Part Number: TMS320F280025

Hi,

My customers have a question about TMS320F28002x UART. They want to use serial communication over 5Mbps. They would like to know how long it actually takes to transfer 48bit data via UART. (Transfer 8bit x 6times) 

Now we want to know the interval from the STOP to the next START bit. If baudrate is 5Mbps, is interval 0.2us?

  • 0
    TI__Mastermind 19775 points

    Hi,

    Thanks for your question! For the effective actual achievable baud rates, please see the calculations shown in chapter 26.12 of the TRM (see 26.12 SCI Baud Rate Calculations). 

    If you are specifically wanting to know these interim timings, please let me know, as this is currently not in the specification.

    Regards,

    Vince

  • 0 in reply to Vince
    Mastermind 6135 points

    Hi Vince,

    Thank you for your reply. I would like to know the timing. Because my customers want to connect the C2000 to FPGA via high speed serial communication. When they decide the FPGA's settings, need the information about the timings.

    Best regards,

    Rei

  • 0 in reply to rei
    TI__Mastermind 19775 points

    Hi Rei,

    Unfortunately after looking into this further, we are unable to provide this information. We can add additional spread when using the FIFO, but this is likely not what you are looking for in this case due to the high-speed nature of the application.

    However, as long as the clocks of the FPGA/C2000 themselves are within typical ranges of one another, inter-byte delay will likely not directly impact communication stability.

    Let me know if you have any additional questions!

    Regards,

    Vince