Russell Bull wrote:
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I would suggest you look at the timing VERY carefully. I don't know how fast the data is clocked in - I can assume it's from a 24 bit a/d converter - do you really need all this logic? Is the processor not fast enough to do some if not all of the work? 24bit a/d's are normally not too fast.

Yes, it is a 24 bit A/D - but it is fast. The maximum speed is around 100k samples/s... But I don't run it at full speed (not yet anyway).

So I think I do need a lot of logic - or a very fast controller. The current datarate is 375kB/s making the clockspeed about 3MHz. So a SAB-C501 at 11.0592MHz is not fast enough without a bit of assistance...

Sounds like it's time for a logic analyser to see what your circuit is actually doing as opposed that what you think it's doing!!

I don't have one available (perhaps I should visit the nice people in the lab at the university), but I have had a look with my scope. And as far as I can see everything looks like I think it should.

Best regards,

Mikkel C. Simonsen