Re: H5400-port Digest, Vol 48, Issue 3

Hi Erik...
I might not have expressed my self precisely .... That's what I call
switchboard http://www.ipaqrepair.co.uk/images/54xxswitchboard.jpg .

I know what things people have been doing with that hardware (yes, I
do like the idea of usb host:) ) What I am precisely interested in is
providing DC power to the mainboard - if anybody has tried that
without this magical switchboard ?

Also - after reading the JTAG (???) description for h5000 series - I
see that some of connectors might be the answer :

# pin 13 - RS232 RXD
# pin 15 - RS232 TXD

# pin 45 - VCC 3.3V
# pin 47 - Gnd
# pin 48 - Gnd
# pin 49 - Gnd
# pin 50 - Gnd

Do I understand correctly that all of these connectors are on the edge
of motherboard and not on the switchboard? Or maybe Jamey meant the
connector on the mainboard that the switchboard is connected ?

Cheers
Michal Panczyk

>
> On Mon, Mar 05, 2007 at 04:19:49AM +0100, Michal Panczyk wrote:
> > Hi all!
> >
> > I am thinking of getting (buying) a h5500 board for some development
> > purposes, but I am not sure if it is going to work... The trick is
> > that I can but the board only - no shell , no battery and I what is
> > the most problematic part , no switch board. I guess that the ipaq is
> > powered from the AC adapter through this switch board, so it might be
> > problematic to skip it.
>
> No switch board? I not familiar with this part. Do you mean you would
> remove the connector that provides the serial port, usb and DC charging?
> You wouldn't need to disconnect it and I doubt the thing would be very
> useful w/out it.
>
> The only thing to be careful of besides totally borking your handheld, is
> making sure that the board thinks a battery is connected. It depends on
> the continuity of the battery circuit to stay on. You either have to
> connect the battery or fake it. The h5550 JTAG page talks about how to
> do fake it by connecting the right battery connector pins.
>
> > Has any one tried that, had any experience with powering the device
> > without the switch board?
>
> At least a few people have cracked open their h555x and done stuff like
> soldered onto the USB hub chip. So anything is possible.
>
> E
>
> --
> Erik Hovland
> mail: erik_at_hovland.org
> web: http://hovland.org/
> PGP/GPG public key available on request
>
>
>
> ------------------------------
Received on Mon Mar 05 2007 - 12:38:45 EST