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TUSB322I: CC状态一直读取的是默认状态

Part Number: TUSB322I
Other Parts Discussed in Thread: TUSB542

实验现象如下:
1)不插入任何设备,上电读出TUSB322i的寄存器值为(0~0x10):32 32 33 42 53 55 54 00 00 20 00 00 00 00 00 00
2)做主机,插入u盘,读出TUSB322i的寄存器值为(0~0x10):32 32 33 42 53 55 54 00 00 20 00 00 00 00 00 00,
反过来插则读出寄存器的值不变。
3)做从机,通过数据线连接到另外一个USB主设备的3.0端口,在此设备上查看不到我们的usb设备,
读出TUSB322i的寄存器值为(0~0x10):32 32 33 42 53 55 54 00 0e f0 00 00 00 00 00 00,
反过来插则读出寄存器的值不变SCHEMATIC1 20.USB.pdf