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请问MSP430F5340在低功耗模式4下,其电流消耗怎么能够达到2uA以下?

Other Parts Discussed in Thread: MSP430F5340

芯片手册上说在LPM4下,其电流消耗典型值为1.1uA,目前电路采用1.9V供电,按理说电流消耗更低,可是实测目前单片机没有连接外部电路,在关闭IO(全部设为输入)后(Timer0打开,其他的ADC、DAC,串口等其他都没有打开),进入LPM4后,电流消耗达到60uA,请问怎么降低功耗?