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BQ76940EVM: Alert pin interrupt

smash Micheal
Intellectual 1000 points
Part Number: BQ76940EVM

Dear all,

Are their any chances that Alert interrrupt will not come?

As am seeing some chances at when Alert is not coming. So please share your experiences , if Alert will come @ 250msec or not.?

I believe if not change is data occurs AFE will not provide Alert interrupt. Is it correct or not?

Rohit

  • 0
    TI__Guru 54715 points

    Hi Rohit,

    The ALERT will set if the status register changes.  If there is no change ALERT does not set.  Other than faults the normal ALERT output is from the CC_READY.  If the CC is operated continuously and the status is cleared each time ALERT is set, it will happen on the 250ms interval.  If ALERT is not cleared, it will not toggle.

    Also note that the CC_Enable must be synchronized to the device timeline, when you set CC_Enable it might arrive just in time to start the scheduler interval and the result will be available in 250 ms, or it might arrive just after the start of the scheduler interval and it will need to wait 250 ms before starting the CC so ALERT will set 500 ms after the enable.