MCUmall EPROM BIOS Chip Burner Forum
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 True USB Willem Programmer (GQ-2X,3X,4X & GQ-4x4)
 Problems erasing at29c040a with GQ-4X

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T O P I C    R E V I E W
jero32 Posted - 06/07/2009 : 07:16:01
I recently got a GQ-4X and as a matter of trying it out. I got out an old flash chip I pulled of a motherboard. Now I seem to be able to read it. (In fact I seem to have a found a joke in the code ;-) ) However I can't seem to erase it! Now I connected a dc adaptor and everything..but it just wont erase it. Any tips?

edit: forgot to mention. I also already tried filling the buffer with FF and then writing that. But that didn't work either.

edit2: tried another chip (not the same type) and it DID erase it. So it's probably not the programmer.
4   L A T E S T    R E P L I E S    (Newest First)
jero32 Posted - 06/07/2009 : 21:30:58
OK that makes sense then :-) Wil have to get another chip.
ZLM Posted - 06/07/2009 : 17:40:35
Your chip seems been locked out. If your chip been bott sector locked out, then there is no way to erase chip.

see:

Image Insert:

60.03 KB
jero32 Posted - 06/07/2009 : 09:58:53
It's a dip package. Of course there's the possibility the chip is busted. But stil nice of you for checking :-)
ZLM Posted - 06/07/2009 : 09:32:24
will check on this.
What is your chip package? DIP or TSOP?

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