First and foremost: I am using the ADP-054 adapter.
I previously purchased two M27C322s by a manufacturer whose name escapes me. Both would program to 50% and fail. Now I have 10 M27C322s made by ST that also fail at 50%. They are erased (I put these things in for 50 minutes) and they look physically good. I just can't imagine this is a mere coincidence.
The adapter does work as I've previously used it with 27C160 EPROMs before. Someone suggested that the chips may not be following JEDEC spec and the programmer is expecting JEDEC but I'm not sure how to find out what the programmer is looking for pinout wise. Anyone got any ideas?
So I've noticed. I also tried to wire A19 and A20 from the EPROM directly to the pin header on the left side of the adapter (labeled J2) with no improvement. From the looks of things A20 isn't connected but I'm not seeing how that is so unless I'm doing something wrong.
M27C322 fails with GQ-4X
Posted - 10/30/2012 : 16:32:26
