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MSP430F2419: P6DIR无法正常设置

Part Number: MSP430F2419


P6设置如下,箭头左侧为GPIO配置。IAR在线调试时运行到P6处无法正常通过。暂停调试,显示P6DIR结果如箭头右侧所示。

使用断点,则P6能正常配置,如下图所示。

请教下,出现这中情况的原因及解决的办法。