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billd420
10 Posts |
 Posted - 10/25/2006 : 22:48:38
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Hello,
I'm having lots of trouble successfully burning a 27C4002 eprom. I am able to dump and blank check the eproms no problem. When I attempt to burn an eprom, it instantly fails and says "error at 0x000801 Chip = 0x00 buffer = 0x67". If I dump the chip that failed, a tiny amount of data was written, but the chip is empty for the most part.
I'm running Windows 2000. I read the readme, and I copied over the DLPORTIO.DLL and DLPORTIO.SYS in my system32 directory. I'm running .97i+ for the software supplied on mcumall.com. I have the jumpers adjusted to 2716, and am using the 16bit eprom adaptor. I'm also using a 12v 500ma power supply, in addition to the paralell port and USB port. I also have PCB3 selected in the programming software.
Any suggestions on where I might be going wrong?
Thanks for any help,
Bill |
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| Reply #1
ZLM
2937 Posts |
Posted - 10/26/2006 : 01:53:36
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It seems your jumper setting was wrong.
The jumper should set to Normal position, not the 2716 chip setting.
You need set the DIP switch too.
Also, do a blank check before write.
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| Reply #2
billd420
10 Posts |
Posted - 10/26/2006 : 06:34:52
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Ok tonight when I get home from work I will change the jumper settings. By normal setting, you mean the option that is listed first in all of the settings correct? Also, I adjust the dip switches accordingly based on what the software tells me.
After I erase my eproms, I blank check them, then attempt to write. The blank check passes every time granted I have a successful erase.
Thanks for the help!
-Bill |
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| Reply #3
ZLM
2937 Posts |
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| Reply #4
billd420
10 Posts |
Posted - 10/27/2006 : 21:33:29
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Ok so I adjusted the jumpers so they are the correct setting(normal). I still can't seem to burn any of my 27C4002 chips. I have about 6 different chips that I am testing with. The burn process gets to 3% and dies every time. The error message I get now is "error at 0x000801 Chip = 0x00 buffer = 0x26". Is there a reccomended tWP and tWC value that I use for this perticular chip? They are ST brand chips.
Thanks for any help,
Bill |
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| Reply #5
billd420
10 Posts |
Posted - 10/27/2006 : 21:45:17
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| By the way, I am able to successfully dump my eproms with the jumper settings set to normal. I just can not program them with out it dying at 3% (it dies at the same spot every time). |
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| Reply #6
ZLM
2937 Posts |
Posted - 10/28/2006 : 23:03:23
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Did you erase the chip and blank check the chip before write?
Can you confirm you used a correct 16 bit EPROM adapter?
How do you know the data you dumped is correct?
If you can confirm the chip is blank before the write, then there is a possibility for the DIP switch setting is wrong or the DIP switch has contacting issue, even the DIP switch is broken.
Also, check the IC socket if it needs clearn. |
Edited by - ZLM on 10/28/2006 23:30:56 |
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Topic |
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Trouble burning 27C4002's w/ Dual Power Programmer
