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USB interface adapter无法识别UCD9081芯片

Other Parts Discussed in Thread: UCD9081, UCD9248

刚买了3个USB interface adapter,配置UCD9081芯片时无法找到芯片,目前了解的情况:

1、板卡以前在别人那里已经配置过UCD9081了,所以板卡应该是好的;别人的adapter是TI技术支持帮弄好的,现在技术支持找不到了。

2、三个adapter都无法找到芯片;

3、示波器抓取IIC总线有时序,但是尾部好想不怎么对。

请问是不是adapter的Firmware有问题,怎么解决,谢谢