TM4C1294 battery drain help

Hello Ken,

Is it just that the battery has been connected and there is no code on the TM4C device which has started the hibernate module?

Regards
Amit

I believe the hibernation module has been started. The following are run in the RTC_Init function

// Enable the hibernate module.
SysCtlPeripheralEnable(SYSCTL_PERIPH_HIBERNATE);
while(!SysCtlPeripheralReady(SYSCTL_PERIPH_HIBERNATE));

// Configure Hibernate module clock.
HibernateEnableExpClk(g_ui32SysClkFreq);

// Configure the module clock source.
HibernateClockConfig(HIBERNATE_OSC_HIGHDRIVE);

// Enable RTC mode.
HibernateRTCEnable();

// Configure the hibernate module counter to 24-hour calendar mode.
HibernateCounterMode(HIBERNATE_COUNTER_24HR);

RTCRead(); //setup tsNow with current info

Hello Ken,

There is an errata on the TM4C129x devices for VBAT conenction. Has the RC filter circuit been installed on the VBAT pin?

Regards
Amit

Yes, there is a filter on the VBAT pin.

Hello Ken,

Could you please share the schematics if possible? Also can you also check if any of the other device pins like VDD, VDDS and VDDC are showing a stray voltage on them? At the same time it would be good to check what is the signal level on the Hibernate Signals (other than XOSC0/1)

Regards
Amit