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DRV8889-Q1: SPI Ready timing verification during testing

Vineet Anurag
Prodigy 180 points
Part Number: DRV8889-Q1

Tool/software:

Hi,

I'm currently verifying the SPI timing parameters mentioned in the datasheet, However there is no reference waveform available in the datasheet which could help me to understand on How i can measure the SPI ready time of 1ms during testing.

could you please suggest the ways in which i can ensure this parameter during testing ?

Thanks & Regards,

Vineet Anurag

  • 0
    TI__Mastermind 24585 points

    Hi Vineet,

    One way to verify SPI functionality would be to read the RSVD and REV_ID bit fields in the CTRL8 register. If the readout matches the value in the datasheet, 0x02 this will confirm correct SPI response from the device.

    You can use the below figure for reference. SPI will be ready after t READY after VM > VRST.

    Please also refer to the below specifications. Note, when nSLEEP = 0 there will not be any SPI response from the device even if VM > VRST. So for SPI communication to be active VM must be > VRST and nSLEEP = 1 and ready time must have lapsed. I hope this helps. 

    Regards, Murugavel