On Tue, 02 May 2000, [EMAIL PROTECTED] wrote:
> So far I found this from Winbond's homepage:
>
> JPEG USB Dual Mode Camera Chip
> http://www.winbond.com/sheet/w9968cf.pdf
>
> The other chip in the camera, the CT6865-01.... dunno.... it has
> Creative Labs stamped on it.
> Any ideas?
Jeff,
Nice scouting work. To know what the other chip does, just
gather all the features on the box, cross off the features that are
in the winbond spec sheet, and also remove the features that could be
done in host software. What remains is what that chip does.
My list suggests: 4 megs of, probably EDO ?, memory;
possibly flash memory of 2 megs for the portability,
an lcd controller for the display, button controllers,
and a microprocessor to handle all off these. This amount of features
in a single chip suggest a custom chip. This may be bad news,
because it may be very difficult to implement without a spec sheet
on that chip as well. My initial look at the winbond sheet shows
it accesses the USB bus, and the other chips are dedicated use
- slaves to signals, so it might not be absolutely necessary for the
specs, but it is desireable to have access to the information, or a
resource person if the driver writer gets stuck.
The webcam chip can implement several types of compression,
and the pictures must be compressed when sent down the USB
for the higher resolutions. The driver would have to implement the
decompression. The webcam chip allows for vendor specific interface
Don't know if this was used in the creative implementation.
I will look into this a little more.
gm
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