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关于430G2353的ad问题



我使用的是430G2353单片机 ,要进行P1.1 脚进行ad采样,在程序编写过程中遇到了疑惑,对于P1.1 脚的设置,我需要将P1.1 脚(功能选择寄存器P1SEL)设置为外围模块功能还是输入/输出功能?P1DIR设置为输入还是输出?