MCUmall EPROM BIOS Chip Burner Forum
MCUmall EPROM BIOS Chip Burner Forum
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wolfievtec

3 Posts
Posted - 03/03/2013 :  07:24:33  Show Profile  Reply with Quote
I'm trying to copy a AM27C020. It reads ok and I get the correct checksum but when I save it and try to put it on another chip it changes and gives me a bad burn. Any ideas?
Reply #1

ZLM

2945 Posts
Posted - 03/06/2013 :  20:41:22  Show Profile  Reply with Quote
Before you clcik on write, the checksum must be a good checksum. Then the chip must complete the write and has to be verified with same checksum.
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Reply #2

Marin

USA
29 Posts
Posted - 03/07/2013 :  20:29:28  Show Profile  Reply with Quote
I think all AM27xxx in OTP( one time programmable).
I believe you can use AM29xxx witch can be read/write many times.
Also you need to empty chip firs before you want to write.

This maybe is your problem.
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