Date: Wed, 15 Mar 2006 21:24:36 +0100
From: Philip Nienhuis <[EMAIL PROTECTED]>
Subject: Re: USB [WAS:Re: [LIB] Libretto 100CT at 300Mhz?!?!?!]
[EMAIL PROTECTED] wrote:
Date: Tue, 14 Mar 2006 13:52:39 -0800
From: <[EMAIL PROTECTED]>
Subject: RE: USB [WAS:Re: [LIB] Libretto 100CT at 300Mhz?!?!?!]
I am not sure, but pin 68 (page 210 of the manual), shows DOCDET - which
I interpret as Dock Detect. It should be a simple matter of monitoring
what this pin does with and without the Libby connected to the docking
station.
The other issue Ray and others were concerned with was a special
hardware chip inside the docking station that actually provided the
proper USB signals.
IIRC John M thought that chip in the EPR is just a line driver, i.e. a
buffer to allow the USB port to deliver enough power (USB cables may be
several m long, output impedance should be low enough to keep the signal
robust to interference on the cable). It seems there are many such chips
available; though I only found ads for bulk delivery of 10,000+ or so :-(
John M also mentioned that one of the linux versions he tried was able
to detect the USB controller - but he didn't specify if that was with or
without EPR attached.
It's all somewhere in the archives (last spring or so?).
Philip
