RTC and power source

[troide]

Hello Community,

I use RTC API in MQX 4.1 to keep the track of time in my application. Based on K60 RM, the RTC is an always powered block that is powered by the battery power supply(VBAT) but in my case it loses the track of time every time I recycle the power. I should mention that I use twr-k60f120 and I have the coin battery in the slot. Any idea what's wrong?

Cheers!

[Jorge_Gonzalez · Accepted solution]

Hello S M:

There is a jumper to select VBAT power (J9). Check the jumper is in position 2-3 so that VBAT can be supplied from coin battery:

Regards!,
Jorge Gonzalez

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