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msp430的IO口，当用作输入口的时候最高可输入的电压是多少？5v可以吗？
一般只能支持3.6V。
但是MSP430F51x2系列的可以支持5V 输入，最多12个IO口可以支持。请参考MSP430F51x2 数据手册
www.ti.com/.../msp430f5152.pdf
