Hi Dominic,
No, I haven't looked at the newer PIC stuff. I'm saving my next self education exercise for the Texas C2000 DSPs. They're a bit like the C2x and C5x parts I used about twenty years ago but I still expect it to be a shock. I'm overdue with this - I have let a client down terribly.
Hi Neon Indicator (sorry, I don't know your name),
I plan to transfer bytes from the CF adapter to the latch by having the PIC generate a 6MHz waveform (there are ways and means of doing that
. The card will see its read clock cycling and feed bytes out on its data lines. An 8 bit latch will then acquire each byte on the rising edge of this clock. The PIC just arranges that the address lines select the card's data register.
The timing looks okay to do this. My fear is that the CF will go AWOL on certain sector boundaries while it does an internal transfer. If that happens my approach will be scuppered!