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还有就是MSP430FR2533 这个芯片串口是GPIO的第几个复用功能,我在数据手册哪里能找到呢?
PxSEL1 PxSEL0 I/O Function
0 0 General purpose I/O is selected
0 1 Primary module function is selected
1 0 Secondary module function is selected
1 1 Tertiary module function is selected