I'm trying to wire up a socket for a Compact Flash card.
I thought it would be easy to determine which is pin 1, however the more I delve the more confusing it becomes. Google leads to various diagrams, however none look like a real card, and they seem designed to mislead (e.g. one shows two rows of pins with the bottom row labelled "Top"!) I downloaded the official PDF Compact Flash spec (v4) but I can't read it (it's "encrypted" with some acrobat scheme that my acroread can't decrypt; I wish people didn't do things like that...especially for a public spec...)
Looking into the holes in the card, with the main (Canon) label on the top side, the groove in the plastic on the left is narrower than that on the right, like this: . ________________________________________________________ . | _| . `-. O O O O O O O O O O O O O O O O O O O O O O O O O | . .-` O O O O O O O O O O O O O O O O O O O O O O O O O |_ . |________________________________________________________|
The card has a triangle (which I would normally guess means pin 1) on the top left as drawn above. The mating socket also has a similar triangle, but it's on the other end so they don't correspond when mated. Crazy huh?
As pin 1 is a ground, and ground pins on the socket are longer than the rest, it has to be either bottom left or top right. Can someone please put me out of my misery and reveal which. As it's going to be bastard to hand wire anyway, I don't wish to have to do it twice!
Thanks.
Mike.