Sleep Mode Current Consumption

[briancavanagh9]

Posted on December 29, 2015 at 21:40

Hi, I'm using the STM32F427ZGT6 uC.  During VBAT operation mode, I'm not certain how much current the battery would need to source.  Can anyone give a idea?  Thanks, Brian

#vbat #sleep

[Tesla DeLorean]

Posted on December 29, 2015 at 21:55

Sleep suggests other parts of the circuit/system have power connected. What else is the battery connected too?

Watch what's connected to PC13,14,15 and one of the PH pins in the backup power domain.

[briancavanagh9]

Posted on December 29, 2015 at 23:37

The battery is only connected to pin 6 on the STM32.  The idea was if power was lost, data would be quickly saved.

[Tesla DeLorean]

Posted on December 30, 2015 at 01:17

I'm not sure of the mechanics there, but Standby is the mode you are looking for. The Data Sheet does go over the VBAT specifics, and options with/without the LSE/RTC and Backup RAM.

PI8 was the other pin I was thinking about in the backup domain.