Usb Host And Client, How does it work Options

[Mjolinor]

Does anyone know enough about the host / client system on the Zaurus to tell me how it prevents damage when a client cable is plugged in.

With a client cable 5 volts is supplied from the host. This comes in the same pin as the 5 volt comes out of when a host cable is plugged in (I think). Why does this not cause a problem?

Reason for knowing.
I just bought a Nokia 770 and the USB native mode is client but it can be made into a host port. Given that the Zaurus does both at the same time and that the only difference between the two physically is the shape of the metal surround (small pliers and brute force fix that problem) I was going to look at making the 770 the same.

[louigi600]

In the USB OTG mini-A receptable in the pack of the Z there is 5 pins:
4 are the ordinary usb
1 is fevoted to sensing whether it sould operate on clinet or host mode.

The plug must therefor gave pin n.5 grounded to make the Z operate live a usb host ... or pin n. 5 not connected to anything (ot very high resistance to ground) to make the Z operate as client.

I've notes on my home page on howto make your own host adapter cable from scrap usb cables.