2008-06-30 08:44:42 BF527 host mode connected to USB hub
Mike Forster (UNITED KINGDOM)
This may be more of a hardware question but perhaps someone here can answer.
I would like to use the BF527 USB controller as only a Host, never a Device. I need to be able to talk to two USB devices so was proposing to use a USB hub to provide this capability.
On page 26-32 of BF52xPeriphHWR03.pdf it says -
"When the HOST_MODE bit is set to 1, the USB controller operates as a host
for point-to-point communications with another USB device. This second
device may be either a high-speed, full-speed, or low-speed USB function,
but it may not be a hub."
Why can't it be a hub? Has anyone tried connecting it to a hub and if so does it work?
2008-06-30 08:50:30 Re: BF527 host mode connected to USB hub
Mike Frysinger (UNITED STATES)
the BF52x and BF54x do not work with hubs. it is a hardware limitation and cannot be worked around.