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.
您好，如果使用AM3354+TUSB2046BIVFR+TPS2044BDR（就是1扩4的USB设计方案），我的板子使用的是HOST（可插优盘键盘鼠标，USB host with USB hub----checklist）模式；请问：
USBx_DRVVBUS should be connected to the enable of the 5V VBUS power source. 没有使能端怎么办？
USBx_VBUS should be connected to the output of the 5V VBUS power source. It is also connected to the VBUS detect on the hub, which then allows the hub to selectively enable/disable typically through a power switch to each downstream port. 关键是输出5V有4路，连到哪一个上面？也没有 VBUS detect 。
