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flash memory corrupted on msp430f54838a after low battery

Other Parts Discussed in Thread: MSP430F5438A

On a couple of our sensors based on the msp430f5438a, when the battery goes to end of life, the flash memory is corrupted. We see few bytes to 0 instead of the right value.

I repeat a manipulation on a device on which I put a loop on a ramp from 1V to 3.2V periodicity 5 sec. After 2 or 3 days, I have the same problem with a corrupted memory.

Have you an idea from where could be came the problem?

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