On Fri, 12 May 2006 15:21:27 -0400, you wrote:

>On Fri, 2006-05-12 at 10:19 -0700, Harold Hallikainen wrote:
>> I'm looking at an application where I have 10 bit parallel data
>> (representing image pixels) flying by at about 27M words per second. I'd
>> like to capture particular words (under pic control, of course). About the
>> only thing I can think of is a really fast synchronous counter (19 bits)
>> driving a binary comparator driving a latch. To get this speed, I'd
>> probably have to throw it onto an FPGA. Does anyone have any other ideas
>> or comments? Does a single chip frame buffer exist that would capture this
>> and let me look at particular pixels using spi? Other ideas?
>
>At only 27MHz and 10 bits of data a CPLD is a viable solution.
>
>I've used the 9536 CPLD with good success, my logan project uses it (and
>connects it to a PIC):
>http://repatch.dyndns.org:8383/pic_stuff/logan
>
>TTYL

If you want a single pixel, and don't need single-pixel resolution, run the PIC synchronously with
the data stream, generate an interrupt on sync, which runs a timer which generates a second
interrupt at the time of pixel you want. 
Failing that, a CPLD should be more than adequate.

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