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 True USB Willem Programmer (GQ-2X,3X,4X & GQ-4x4)
 Write Problems 29F400AB Psop44 V4.1 adapter

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T O P I C    R E V I E W
dying-culture Posted - 09/24/2015 : 04:59:19
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
5   L A T E S T    R E P L I E S    (Newest First)
kalida40 Posted - 10/21/2015 : 08:12:42
I had the same problem, and it works, thank you for your advice.


Regards.
dying-culture Posted - 09/26/2015 : 03:26:23
ok,
thank you for the Info and Help !

Regards
ZLM Posted - 09/25/2015 : 21:53:16
The chip is a protected chip.
Temp Unproect is to remove the protection when programming. But chip still be protected after programming.
dying-culture Posted - 09/25/2015 : 14:44:59
Thank you, it works :-)
Temp Unproect, but why ? for what is that ?
ZLM Posted - 09/25/2015 : 06:54:45
This may be related to chip itself.
Try:
1. Check the Temp Unprotect check box in software.
2. Slower speed.

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