MCUmall EPROM BIOS Chip Burner Forum
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 True USB Willem Programmer (GQ-2X,3X,4X & GQ-4x4)
 Write error when programming AT28C256		  New Topic  Reply to Topic
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penroseking

1 Posts
Posted - 06/26/2023 :  02:53:09  Show Profile  Reply with Quote
When attempting a write on my EEPROM I received the following error:

Full message log:

Ready
GQ-4x4 1.0 @ SW Re. 7.32
USB Driver Re.3.0
Software Re. 7.32
Checking new software on server...
Serial #: R22118332A
DEVICE AT28C256
Load G:\My Drive\Documents\BenEater\HelloWorld\xab
g:\my drive\documents\beneater\helloworld\xab.
Configuration OK!
This software is updated already.
<<AT28C256>>
ID check skipped
Writing... Buffer
Elapsed time: 0.20 seconds.
Write failed, Address=0x00003F, Buffer=0x00 Device=0xFF
Write failed

Chip markings:
ATMEL
AT28C256
15PU
2122
Reply #1

ZLM

2937 Posts
Posted - 07/13/2023 :  13:07:23  Show Profile  Reply with Quote
try to use slower speed. Like 0,-1,-2.

IF it still does not work, from software menu to diagnose the voltage.

If voltage is OK, then the problem may be the chip itself.
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