MCUmall EPROM BIOS Chip Burner Forum
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 True USB Willem Programmer (GQ-2X,3X,4X & GQ-4x4)
 Failure to program 2764A		  New Topic  Reply to Topic
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StellasMan

USA
7 Posts
Posted - 10/30/2011 :  20:47:23  Show Profile  Reply with Quote
I am trying to program several 2764A chips (exact model number LD2764A-20) with a GQ-4X programmer and am getting an error trying to write the buffer. I am running on version 6.13 of the software. I purchased an additional power supply and set it to 9V, but still no success.

Any tips on what I need to do to get this to work?
Reply #1

ZLM

2945 Posts
Posted - 10/31/2011 :  11:20:29  Show Profile  Reply with Quote
what is your exact error message?
did you pass the blank check before write data?
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Reply #2

StellasMan

USA
7 Posts
Posted - 10/31/2011 :  14:10:30  Show Profile  Reply with Quote
I am able to read the data correctly. I actually read a 2764A chip with data on it successfully. Blank check passed OK. Although I can't remember the exact verbage of the error, it was something like this:

Error during write: Buffer location 0000: Data: 02; Write location: 0000: Data: FF

In short, it failed to write the first byte.

I have added an auxiliary power 9V supply, center pole positive, to the programmer, but the results were the same.

There are three 2764 chips to choose from when configuring the software.
1) Standard 2764
2) 2764A (12.5 volts) and
3) 2764A (20 volts).

None of these selections worked.
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Reply #3

StellasMan

USA
7 Posts
Posted - 10/31/2011 :  17:19:55  Show Profile  Reply with Quote
Here is the exact text of the error:

===========================================
Ready
H/W Re: GQ-4X Re-1.40
USB Driver Re.2.0
Software Re. 6.13
Checking new software on server...
This software is updated already.
DEVICE 2764(21V VPP)
<<2764(21V VPP)>>
Load C:\Users\Dad\Documents\Adams-Maxwell\BobbinProj\Generic3.hex
c:\users\dad\documents\adams-maxwell\bobbinproj\generic3.hex.
Speed = 5
ID check skipped
Writing... Code
Elapsed time: 26.31 seconds.
Write failed, Address=0x000000, Buffer=0x02 Device=0xFF
Write failed

==========================================================================

Identical error occurred using devices '2674' and '2764A(12.7V VPP)'.

Exact text on the chip is as follows:

LD2764A-20
U3160150S
PGM @ 21V
<copyright> i '88
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Reply #4

TimP

11 Posts
Posted - 11/05/2011 :  06:05:35  Show Profile  Reply with Quote
I have had a similar error, but mine turned out to be a bad chip as I had no problems burning different ones.

Just a thought.
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Reply #5

ZLM

2945 Posts
Posted - 11/08/2011 :  12:22:23  Show Profile  Reply with Quote
confirm your chip is no problem.
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