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CC2540 keyfob 功耗问题

Other Parts Discussed in Thread: CC2540

hi 各位

我现在在做的一个cc2540 的东西,用的keyfob工程为原型,发现它平时的电流在400uA左右,网上有人说进入pm2电流才0.9ua,怎么实现的啊?给位关于功耗的问题在软件上有什么提示吗?