TMAG5170-Q1: Changing the threshold value

Chad,

Thanks for reaching out on E2E with this question.  There are two options to clear the threshold counter.  You may either perform a read on the SYS_STATUS register or perform a write on ALERT_CONFIG. This means that if you change the threshold mid count, that it should carry over.

Thanks,

Scott

Chad,

When using the threshold settings, it is necessary to configure ALERT as an output pin.  There are two modes for this pin.  In switch mode, the ALERT pin is only asserted as long as the threshold conditions are met.  So if the threshold changes and the input is no longer at the threshold level, then I would expect the ALERT pin to release.  The other mode sets this pin as latched, and ALERT will stay set until cleared.  

Since it requires a read on the STATUS registers or a read on a data register to clear, I would expect it to stay latched after changing the threshold value.

Chad,

My understanding is that the only way that the counter is reset through the read on SYS_STATUS or by performing a write on ALERT_CONFIG. This means that if you change the threshold mid count, it should carry over.

Thanks,

Scott