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WL1831MOD: Wifi BT interface with power save mode

Pradeep Prabhu G
Intellectual 560 points
Part Number: WL1831MOD

Hi Team,

For power saving, We have connected a separate BUCK regulator for VBAT power and when wifi interface is not required we are disabling this regulator.

But for IO voltage supply(1.8V) is shared with other interfaces. So we are not disabling this regulator.

So IO 1.8V is always supplied to IC even if there is no main VBAT power.

Please clarify is there any problem if we supplied IO voltage to IC even if VBAT is not supplied.

Also please clarify is there any recommendation to connect pullup resistor to WIFI_EN and BT_EN pins