MCUmall EPROM BIOS Chip Burner Forum
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 Using The Enhanced/Dual power Willem Programmer
 reading AM29F800 w/ dual power willem
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6 Posts

Posted - 06/15/2011 :  16:41:22  Show Profile  Reply with Quote
I'm having some issues getting a good READ from a AM29F800 chip.

I will read it, then turn around and verify buffer, and I come up with BYTES that are just a little different.

example: Chip = 0xFE Buffer = 0xFF or chip, 0xAA, buffer= 0xAB

over the whole file, about 10 of these. I can correct the hex value in the buffer, then verify again, and it goes a little further. So far I'm up to $0B3730 of the chip and have had 6 corrections. each time I make a correction to buffer, it has ALWAYS gone farther before throwing the next difference at me.

any ideas? I've changed the timing a little, i'm at 4 uS on tWP and 32 uS on tWC
Reply #1


2942 Posts

Posted - 06/29/2011 :  18:32:52  Show Profile  Reply with Quote
check you pin contact.
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