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VBAT and VBAK connection for RTC in MSP430F6636

smitesh mali
Prodigy 60 points
Other Parts Discussed in Thread: MSP430F6636

Hi,

I am using  MSP430F6636 micro controller.

I am using internal RTC_B.

I have disabled Back supply switching in BAKCTL register as i am not using back up battery.

VBAT pin is connected with Vcc and VBAK is Not connected.

Currently , I am facing problem of RTC failure during first time power on.

After first power on , if i reset the supply then RTC works properly.

In RTCCTL01 register RTCOFIFG flag is found high when problem occurs.

External Crystal of 32.768 KHz is working properly.

Kindly suggest solution.

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