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程序下载后IO口异常

Other Parts Discussed in Thread: OMAP-L138

你好!

我使用的官方上的历程,单独启动DSP核,下载到NANDFLASH中启动,使用仿真器调试的时候所有的都是正常的,下载到FLASH中后启动,IO口异常,有一个电平加上上面,外部驱动到低电平的话拉不下来;请问是什么原因啊