BQ27427: What triggers the watchdog reset WDRESET ?

Johann

Part Number: BQ27427
Other Parts Discussed in Thread: BQ24010

Tool/software:

Hello,

I notice that during charging or recharging, the WDRESET pin goes high, leading to an ITPOR and causing me to lose all my configuration.

What conditions, other than undervoltage, can cause the WDRESET pin to go high?

The issue occurs during the charge and discharge cycle when I leave my MCU powered off.

Could you also check the schematics? There might be an issue since we are using the BQ24010 as a charge controller.

7 months ago

0 Jonny 7 months ago

TI__Mastermind 24931 points

Hello,

To me it seems that the gauge is either experiencing a brownout, or there is an unintentional reset command being sent to the gauge. The reason I believe this is that the only way for the ITPOR bit to be set is if either the gauge loses power, or the reset command is sent to the gauge.

Otherwise, I do not see any obvious issues with your schematic from the gauge perspective.

Regards,

Jonny.