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MSP430F5438A休眠电流问题



我的设备调试休眠待机电流可以控制在9uA,并且能够稳定在这个数值,但是遇到下雨阴天时功耗会升高到100uA左右,用热风枪加热单片机后恢复正常,但是过后又会升高,室内开空调或者天气恢复晴朗后电流又恢复正常,该问题已经发现好几次了,

求教这个问题如何解决?