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CC2540低功耗模式下串口是否可以实现?

Other Parts Discussed in Thread: CC2540, CC2530

看了之前的讨论,似乎认为系统进入PM3状态后,因为没有晶振,无法实现串口的收发。但是如果系统不进入PM3,只是在PM1和PM2之间有些状态切换,一定程度上也实现了低功耗,是否可以实现串口的收发呢?