I got a strange problem on lpm1 (low power mode 1). After intialized msp430fr5989, I set it to __bis_SR_register(LPM1_bits | GIE); // low power mode 1 and enable global interrupt. Once in a while, the timer interrupt stops to work. If I set it without lpm1, then I don't see any problem. Is the lpm1 really causing this problem? My timer interrupt clock source is ACLK, which should be active during lpm1.
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