Chris,

The references to using comparitors or schmitt triggers are good ones as you don't need an parallel ADC for a monochrome CCD. That's why Rob referred to the comparitor as a 1 bit A/D. Besides the LM 311 you can use a LM139 (.5 us) and a variety of other comparitors (the 311/139 are just easy to get).

I assume you set the clock rate either by toggling a port pin, or an external clock. What is its Fz?

As to storing the frame. You might consider run-length encoding for intermediate storage.
Run-Length is fast (so you can do it on the fly) and it works great for monochrome, and you won't lose any data.

Again i assume, you are rotating the bit's from the CCD into a byte. So each line is 16 bytes. You might assemble a line, run-length it and then store it.

Another technique you might use depends upon the resolution you require for your pursposes, that would be filtering the data to construct a smaller image. A simple filter would be just to add two consecutive pixels, rotate right (div/2) and rotate the result into a byte. Now your data is 1/2 the size but a better image is available than if you just ignored every other bit. If you then run-length encoded this you would have even more image storage compression.

You could, of course, perform the add/div on the byte level but this would be most suited for a "prevue" or "rough" image capture.

regards,
p