Hey guys. I have to interface with a AD7894 (using an FPGA so not really and AVR topic..)
Anyway, I'm reading the data sheet and the timing on the serial protocol makes absolutely zero sense to me. Normally Analog Devices writes the best data sheets and app. notes around but I think they missed the mark on this one.
However, it might just be my dim understanding and not their fault at all. Has anyone used one of these buggers. Or even can someone have a look at the timing diagram of the serial protocol and see if they can translate it to me? It's on page 8.
In particular the 't4' and 't5' numbers are a mystery to me. Taken to the extremes it would seem that it is possible for data to only be valid for just over 10ns!!! hmmm I've got to be missing something.