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Original question:

TMS320F28335:F28335 SPI communication

TMS320F28335: SPI communication rate problem

Rain Wang
Expert 1400 points
Part Number: TMS320F28335

hello TI

       Now We have a problem. When the SPI speed is 2.5M, the data is normally received, but when it reaches 5M, there is dislocation. The data received at 10M communication speed is chaotic.

What is the theoretical maximum SPI reception speed of this processor?

   

SPI2 interface slave machine only receive not send

  • 0
    TI__Mastermind 27861 points

    Hi Rain,

    The max speeds are noted in the datasheet.

    Internal clock prescalers must be adjusted such that the SPI clock speed is limited to the following SPI clock rate:

    Master mode transmit 25-MHz MAX, master mode receive 12.5-MHz MAX

    Slave mode transmit 12.5-MAX, slave mode receive 12.5-MHz MAX.

    Please note that the speeds also depend on the signal integrity of your PCB design.