MCUmall EPROM BIOS Chip Burner Forum
MCUmall EPROM BIOS Chip Burner Forum
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The Beer Guy

4 Posts
Posted - 02/15/2009 :  05:43:41  Show Profile  Reply with Quote
hey guys
I'm trying to reprogram this chip, but can only get as far as 6%

using
GQ-3x
tsop 32 adapter
jumper closed- if i leave it open, the chip id is wrong
chip id is correct
i can get a good read from chip
i cannot get it to unprotect.
erase will fail, and i tried connecting external 9V power source.

i have cleaned the chip, and tried many attempts at moving chip in adapter to get it to seat better. all the pins seem to line up fine


thanks for any help
Reply #1

ZLM

2945 Posts
Posted - 02/15/2009 :  16:02:34  Show Profile  Reply with Quote
How do you know your chip is protected?
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Reply #2

The Beer Guy

4 Posts
Posted - 02/16/2009 :  08:22:48  Show Profile  Reply with Quote
when i try to unprotect it, it shows all sectors are protected, and it will not erase the chip
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Reply #3

ZLM

2945 Posts
Posted - 02/16/2009 :  22:31:46  Show Profile  Reply with Quote
So, the chip can not be erased. No write too.
The chip need to find a way to unlock it first.
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