MCUmall EPROM BIOS Chip Burner Forum
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 True USB Willem Programmer (GQ-2X, GQ-3X, GQ-4X)
 Write Problems 29F400AB Psop44 V4.1 adapter
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dying-culture

Germany
3 Posts

Posted - 09/24/2015 :  04:59:19  Show Profile  Reply with Quote
Hello,
i have a Chip AM29F400AB an a Psop44 V4.1 Adapter
i can read the chip, erase, blank check, when i will write the file (the same file i have read out)come the error

Write failed, Address=0x00001B, Buffer=0,80 Device=0xFF

click Write

Write failed, Address=0x000027, Buffer=0,80 Device=0xFF

click Write

Write failed, Address=0x00002D, Buffer=0,80 Device=0xFF

........
??

i have checked
another PC
another USB cable
9V PSU
Jumper

Edited by - dying-culture on 09/24/2015 08:45:42
Reply #1

ZLM

2923 Posts

Posted - 09/25/2015 :  06:54:45  Show Profile  Reply with Quote
This may be related to chip itself.
Try:
1. Check the Temp Unprotect check box in software.
2. Slower speed.
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Reply #2

dying-culture

Germany
3 Posts

Posted - 09/25/2015 :  14:44:59  Show Profile  Reply with Quote
Thank you, it works :-)
Temp Unproect, but why ? for what is that ?
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Reply #3

ZLM

2923 Posts

Posted - 09/25/2015 :  21:53:16  Show Profile  Reply with Quote
The chip is a protected chip.
Temp Unproect is to remove the protection when programming. But chip still be protected after programming.
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Reply #4

dying-culture

Germany
3 Posts

Posted - 09/26/2015 :  03:26:23  Show Profile  Reply with Quote
ok,
thank you for the Info and Help !

Regards
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Reply #5

kalida40

Nicaragua
1 Posts

Posted - 10/21/2015 :  08:12:42  Show Profile  Reply with Quote
I had the same problem, and it works, thank you for your advice.


Regards.

HOLA
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