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MSP430FR6047: UART interface based on LFXT gets locked up

Part Number: MSP430FR6047


We've been seeing an UART lock up issue on several boards.

The boards started with any issues and the lockup issue randomly happened.

When the issue happens, LFXTOFFG in CTL5 register is set.

However, even after the crystal output was recovered, the UART port still didn't work

We are using exactly same circuit and crystal part as the Eval board has.



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