- Ask a related questionWhat is a related question?A related question is a question created from another question. When the related question is created, it will be automatically linked to the original question.
Hello,
Recently I found out an issue with switching from buspowered to selfpowered mode.The hub works fine in most cases, however when I
connect the hub to the host, connect a device on one of the downstream ports above number 4 (the exclusively self powered ones) and then connect the hub on a external power supply, the
HUB is not resetting and the downstream port won't work before a manual reset. I expected if there is a logic change on the BUSPWR pin that there will be a reset.
The strangest thing is when I connect the external power supply quickly after connecting the host, it will work fine. It needs to be at least 10 seconds or something to not work anymore.
Anyone familiar with this issue?
Kind regards,
Gert-Jan
Yes, PWRONx does not recover after about 6 seconds without external power supply. before the 6 seconds the PWRONx works fine. the red PORTPWR Led turns on aswell. 
