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CC2642R: cc2642的串口悬空接收数据异常。

Part Number: CC2642R

1.在使用cc2642  uart时,在接串口板时可以正常使用,但当cc2642的uart rx和串口板的tx断开时,cc2642将不停的接收一些异常数据。

2.在配置中将rx的设置成上拉,但在uart打开之后rx将无上下拉。

3.请问怎么做可以使cc2642悬空下,无异常数据?