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problem reading data of bq20z90.

Remony
Expert 1560 points
Other Parts Discussed in Thread: BQ20Z90, BQEVSW

Hi,

I read data of bq20z90 continously.

bq20z90 sends incorrect data when I send read command without delay.

data is response of revious comman.

But I send read command with delay, bq20z90 sends correct data. (approximately 100us)

 The delay time is required between command and command?

What is minimum delay time?

  • 0
    TI__Intellectual 2120 points

    The complete SMBus data set is only updated every 1s so reading faster than this could cause repeated data to be returned, this is valid. If you are using the bqEVSW to read the data then there is also delay associated with the EV2300 USB to SMBus interface and the number of selected commands to scan/log by the bqEVSW.

    Best regards

    Garry