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ceut
France
10 Posts |
 Posted - 02/19/2010 : 09:24:32
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Hello!
I try to read an ST93C56 with the "M93C56" which is the correct one.
But when I read it, I have one correct byte on two.
I have tried several parameters, slowdown speed to "-2", try old 3.03 version and with 2 differents computers, it's always the same: the GQ4X only extract one byte on two.
Example of extraction: "B6 FF 49 FF 00 FF 49 FF 00 FF A0 FF 82 ..."
I use a lot of PIC MCU and no problem with them.
The ST93C56 is on a home-made socket which works on its original device(wires are as shortest as possible):
h**p://morpheus.stigmata.free.fr/ST93C56.jpg
Could someone help me to find why I have this bug?
Thanks!
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Edited by - ceut on 02/19/2010 10:05:15
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| Reply #1
ZLM
2945 Posts |
Posted - 02/19/2010 : 11:20:45
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It seems a 16 bit chip.
Try to select "93C56B(16Bit)" from software. |
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| Reply #2
ceut
France
10 Posts |
Posted - 02/20/2010 : 02:55:43
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Hello,
I have tried all "93C56" chip, including 8 and 16 bits, it does the same problem... don't understand why 
Any other ideas  |
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| Reply #3
ceut
France
10 Posts |
Posted - 02/22/2010 : 05:43:31
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Problem is still there, so I have ordered some new 93C56, then I will try again and post here again.
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| Reply #4
ceut
France
10 Posts |
Posted - 03/21/2010 : 13:20:17
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Hello,
After trying to read the 93C56 again, I have always this strange problem.
Read in 8 bits mode(whatever 8 bit device I choose):
AE FF 51 FF 00 FF AE FF 51 FF 00 FF AE FF 51 FF 00...
Read in 16 bits mode(only one 16 bit device):
AE 31 51 FF FF C8 AE FF FF 06 00 FF FF 2F 51 FF FF...
I received some 93C56 but they are empty(as they're new...) so I can't reproduce this problem.
I have also tried to program a new 93C56 with extraction of 8 then 16 bits, and put back this new one on the device: don't work at all :-(
Strange extraction, in 8 bits mode, only 1 of 2 bytes is correct.
On 16 bits mode: only 2 of 4 bytes are correct.
I have tried to slow down to -2 the extraction: same problem.
No problem at all with my PIC12F508 or 629 device.
Any idea why I have this? Bug of software?
Actually, I'm working on making a basic parallel-port 93C56 programmer to check if I can read whole of my original eeprom...
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| Reply #5
ZLM
2945 Posts |
Posted - 03/24/2010 : 06:55:43
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We can not reproduce the problem here. We will check ths software on this issue.
If possible, send a testing chip to me. |
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| Reply #6
ceut
France
10 Posts |
Posted - 03/24/2010 : 13:34:47
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I have only one chip which is not mine...So I can't send you one
I have found a simple parallel port programmer with a DOS program(h**p://hw-server.com/constrc/seep.html) which seems to work with the new 93C56 I have ordered.
(Author of this free DOS software says "Software currently supports these devices: 93C46/56/57/66/76/86, 24C01/02/04/08/16/32/64/128/256. Software is designed according to specifications by Atmel and ST.")
I will try to read my friend's ST93C56 when I see him, and post my results.
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Edited by - ceut on 03/24/2010 13:37:39 |
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Topic |
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Strange Problem GQ-4X with M93C56 , software v5
