RE: H3100 flash

The second flash chip would have to be mapped into address space by Linux --
I assume it is connected to the next chip select (cs1#).

There is no JTAG connector.

Jamey

> -----Original Message-----
> From: Gopi D Flaherty [mailto:gf2e+@andrew.cmu.edu]
> Sent: Tuesday, August 14, 2001 9:13 PM
> To: familiar_at_handhelds.org
> Subject: [Familiar] H3100 flash
>
>
> Hi,
>
> I just opened up my H3100 to perform some modifications (converting it
> from stereo out to mono out + mic in, among other things; currently
> looking to see if I can set it up so that the internal speaker is left
> and the audio jack has right) and noted something odd:
>
> There's a single intel E28F128 flash memory chip there, and blank pads
> next to it. There are blank pads for two different sizes of
> flash chips,
> one the same as the existing chip, and the other with slightly fewer
> pins.
>
> Is anybody aware of what the differences are between the two
> chips that
> are accepted? Also, can I just solder (with an SMT rework station; not
> gonna even think about using a rat shack iron) a new flash
> chip on there
> to get myself 32MB?
>
> On a more insane note, there's a lot of free space
> (relatively speaking
> :) inside here. It looks to me like there's the physical
> space for more
> flash memory chips. I'm wondering about the possibility of soldering a
> (very, very) low profile connector on there, with a thin PCB,
> addressing
> circuitry, and more flash chips. I'd _love_ 6 or so 16MB flash chips
> here. I'm not sure if there's be speed issues with
> addressing, requiring
> wait states, but with 128MB of DRAM (gonna upgrade when the chips get
> here) I'd be happy to have a big cache and take a performance hit for
> that much speed...
>
> Final question: which connector is the JTAG connector? I'd like to
> ensure I can recover before I upgrade flash memory...
>
> Thanks,
>
> gopi.
>
>
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Received on Wed Aug 15 2001 - 04:35:38 EDT