you know, we use the Vdcdc2 to pull up the Power_on, if we use VBat,in deep sleep mode,we can pull PB_in to low to power on all rails. however, in deep sleep mode,DC_IN/USB_IN does not trig power up event,the PMU will still in deep sleep mode even there is DC-IN or USB-IN.could you please help advise what we need to do if we want to let the DC_INor USB_IN to trig the power on event in deep sleep mode?
You will need to design so that AC and/or USB briefly pull /PB_IN low when attached to exit DEEP SLEEP.
do you mean we need to add external circuit for this function? could you please offer the circuit to me?
Yes, you will need to add an external circuit.
The following circuit should work:
When AC or SYS are connected they will pull PB_IN low. This will turn on the converters.
The processor will then need to assert the "Stay Awake Key" GPIO to release /PB_IN.
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