This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

HD3SS3220在DFP模式无法正常切换

Other Parts Discussed in Thread: HD3SS3220

Dear TI FAE;

我们在使用HD3SS3220的时候遇到了在DFP模式无法正常切换的情况,具体现象如下。

1)在U盘正插的情况下。测得CC1=0.4V,CC2=4.83V

2)在U盘反插的情况下。测得CC1=4.83V,CC2=0.4V

但无论在U盘正向插入还是反向插入的情况下DIR管脚输出都是高电平,且都只能在TX1测到信号输出,无法正常的切换到TX2。另外ID管脚的输出也是高电平。

 请问这是什么原因造成的?