Hello,
When two TUSB8041s are connected as the below figure, I would like to confirm what signal should be connected to USB_VBUS pin of the 2nd TUSB.
Should PWRCTLx/BATENx be connected to USB_VBUS pin of the 2nd TUSB?
Or should 3.3V or 1.1V hub power be connected to it? If so, what resistance value should be used in resistor divider?
Regards,
Oba
Hello,
Thanks for your reply and I’m very sorry to my late response.
So the below is my understanding (also added more detail about the system). Is it correct?
One of my concern is 4th port of 1st TSUB8041 requires power control.
And from the below my previous post, your team suggested to configure it as ganged power control.
In this configuration, USB_VBUS of 2nd TUSB8041 is always ON if VBUS exists.
But when 4th port power is switched off, because it is configured as ganged, I feel the host thinks all other ports also are switched off
although USB_VBUS of 2nd TUPS8041 is still ON. Doesn’t it cause any strange behavior?
Because I’m not so familiar with USB hub specification, my concern may not make sense, but could you please make clear?
Regards,
Oba
Hello,
I think I understand.
So is it OK that USB_VBUS of 2nd TUSB8041 is simply connected to the same pin of 1st TUSB8041 like the below figure?
Regards,
Oba
