On Wed, 3 May 2000, gm wrote:
> 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.
I thought it was interesting that Winbond's web page didn't have a
direct link to the PDF. It came up when I modified a URL of a similar
chip. Is the chip that new?
I don't really need the still camera mode of the device (although
I thought it was a cool addition). If Linux can talk to it as a video
camera, that's good enough. Maybe later gPhoto can talk to it.
> 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.
Just speculation, but it seems the Creative stuff added the still
camera mode. The Winbond is just a video camera chip. Does that sound
right?
> I will look into this a little more.
I'll keep the camera instead of returning it if you would like me
to be a guinea pig.
...Jeff
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