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CC3200,上电瞬间,gpio输出1.3V ,10ms的脉冲

Other Parts Discussed in Thread: CC3200

TI工程师好,请帮我分析一下。

用CC3200的gpio控制三极管,驱动led,电路也开发板的一样。但是上电瞬间,led会闪一下,使用示波器能够量到上电瞬间有一个10ms 1.3V的脉冲。请问这是什么情况,上电瞬间,cc3200应该还没完成初始化,gpio不是应该高阻态吗?为啥会有输出呢?