STPMIC1 - PONKEYn POWER_ON POWER_DOWN trigger

[SYEH]

For STPMIC1, when it is powered on by asserting the PONKEYn signal low, what would happen if the PONKEYn remains asserted low even after the initial POWER_ON trigger? Would it subsequently trigger a POWER_DOWN if PONKEYn long press turn off is activated? Or is the PONKEYn event triggered only when there is a HIGH to LOW edge transition (edge trigger) ?

Thanks.

Steven

[Olivier GALLIEN · Accepted solution]

Hi @SYEH​ 

In that case STPMIC1 will not trig a POWER DOWN. You need another HIGH to LOW edge transition to start the Long Key Press timer.

Hope it help,

Olivier

[SYEH]

Hi Olivier,

Thanks for the reply. Understood.

Is that the same for the WAKEUP pin? As in the WAKEUP POWER_ON event will only trigger from LOW to HIGH edge transition, and does not require to stay HIGH after the initial trigger?

Thanks.

Steven.

[Olivier GALLIEN]

Yes WAKEUP pin is edge sensitive. Except in the situation explain in DataSheet Figure 58. Turn-on condition before VIN_POR_Rise.

Olivier

[SYEH]

Hi Olivier,

Thanks for the response. Much appreciated.

All clear now.

Cheers.

Steven