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MSP430F6746A: RTC_C become slower when working with AUXVCC3

Part Number: MSP430F6746A

Hi Team,

Customer is using RTC_C of F6746A.

when they have VDD supply, RTC is accurate. 1s delay/day.

however, when it operates with AUXVCC3, it has about 30s delay/day.

VDD is 3.5V, and AUXVCC3 is CR2032 3V.

Where should I check to debug this problem?

Ted

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