C3088 CMOS Imaging Sensor Questions

"Bob" <SkiBoyBob@excite.com> wrote in message
news:4hpt53Fp8leU1@individual.net...
> I don't know if it will easily interface to your PIC, but I used a IDT
7205
> FIFO to capture sub-windowed images from a camera. Once a sub-frame is in
> the FIFO, you can read it out non-destructively for multiple passes at the
> data. Gruesome, but better than nothing.

Gruesome? How would you rate the following?

An 8051 connected to an SRAM chip of 256kbyte, together with a CPLD and an
ADC. To capture an image, the 8051 would toggle a pin on the CPLD and then
go into power down mode. The CPLD detected the power down mode (which also
floats the 8051's bus pins), took over the SRAMs address bus, enabled the
ADC on the databus and pumped an image from ADC to SRAM at a fixed location.
When the transfer was complete, the CPLD floated it's bus pins, disabled the
ADC and interrupted the 8051 from power down mode back to life.....

Meindert

"Meindert Sprang" <ms@NOJUNKcustomORSPAMware.nl> wrote in message
news:12bflf9a6gt9adb@corp.supernews.com...
> "Bob" <SkiBoyBob@excite.com> wrote in message
> news:4hpt53Fp8leU1@individual.net...
> > I don't know if it will easily interface to your PIC, but I used a IDT
> 7205
> > FIFO to capture sub-windowed images from a camera. Once a sub-frame is
in
> > the FIFO, you can read it out non-destructively for multiple passes at
the
> > data. Gruesome, but better than nothing.
>
> Gruesome? How would you rate the following?
>
> An 8051 connected to an SRAM chip of 256kbyte, together with a CPLD and an
> ADC. To capture an image, the 8051 would toggle a pin on the CPLD and then
> go into power down mode. The CPLD detected the power down mode (which also
> floats the 8051's bus pins), took over the SRAMs address bus, enabled the
> ADC on the databus and pumped an image from ADC to SRAM at a fixed
location.
> When the transfer was complete, the CPLD floated it's bus pins, disabled
the
> ADC and interrupted the 8051 from power down mode back to life.....
>
> Meindert

I call that *true* DMA, of course ;-)

Nice work, Meindert!
Bob