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单片机引脚功能复用

Other Parts Discussed in Thread: MSP430F5244

当单片机的一个引脚具有多个复用功能时该如何处理?

我使用USCB0的I2C功能后,发现配置USCB0的SPI模式时,寄存器里一直保持为I2C的UCMODE_3,不能修改成SPI的UCMODE_0。

试问这种情况该如何解决?