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kindx · 02-12-2010, 10:48 AM

Hi,

looking at USB OTG specification shows that a additional (5!) pin is used to toggle between USB B (client mode, mem/charge/usbnetwork) and USB A Mode (host mode!) by connecting it to gnd or leave it open.

I tried to connect a Micro USB A to USB A Adapter plain and with a USB-Stick and with a USB-Hub (external powered), nothing happend

There are no signals raised like when normaly connected to a host (pc), no messages in the log.

So what does it mean?
Either it is a MicroUSB B port only, or it is a MicroUSB AB port and needs some configuration.

There must be USB host drivers because the modem in DXI uses the USB host pins on the mini pci-e connector.

Can anybody figure out if (from software) USB hub / sticks are supported,
if yes I would take the risk and solder some wires to the mini pci-e connector to get the USB pins.

any idea?

02-12-2010, 10:48 AM	#2
kindx Member Posts: 11 Karma: 10 Join Date: Feb 2010 Device: kindle dxi	Micro USB OTG Host Mode A? Hi, looking at USB OTG specification shows that a additional (5!) pin is used to toggle between USB B (client mode, mem/charge/usbnetwork) and USB A Mode (host mode!) by connecting it to gnd or leave it open. I tried to connect a Micro USB A to USB A Adapter plain and with a USB-Stick and with a USB-Hub (external powered), nothing happend There are no signals raised like when normaly connected to a host (pc), no messages in the log. So what does it mean? Either it is a MicroUSB B port only, or it is a MicroUSB AB port and needs some configuration. There must be USB host drivers because the modem in DXI uses the USB host pins on the mini pci-e connector. Can anybody figure out if (from software) USB hub / sticks are supported, if yes I would take the risk and solder some wires to the mini pci-e connector to get the USB pins. any idea?