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TM4C123GH6PZ PD7口无法正常置高置低



只是将PD7链接到插针上,中间没有连接其他的东西。单独将PD7口置高置低,并没有达到预期的电压,都是0.5~0.8V左右,仿佛不受控制。其他的PD口都可以正常的配置,换了开发板和芯片都不行。是不是这款芯片的PD7口都有问题???求解释?