您好
因为需求需要，想实现msp430F5659再VCC掉电情况下的RTC时间保持功能。
问题①请问以下连接可行么，DVCC3 = 3.3V，VBAT = 2.7V。
②掉电前和掉电后每次读取是否需要加上这段代码
while(BAKCTL & LOCKBAK)
BAKCTL &= ~(LOCKBAK);
③是否需要掉电前必需设置为PM3.5模式，DVCC3恢复后系统就reset了吧。
谢谢
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