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 Reading a programmed tms27c020

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T O P I C    R E V I E W
vidiot Posted - 09/21/2005 : 21:37:40
I have a new top2005 programmer and I'm having problems reading the eproms.

I have pre-programmed tms27c020 chips but when I go to read them the programmer reads then as FF on the entire chip.

Is there something I'm missing? Or do I have a defective unit?

5   L A T E S T    R E P L I E S    (Newest First)
usb Posted - 11/28/2005 : 14:41:04
The TOP2005 does not support 16 bit EPROMs, such as 27C1024,27C4096. It is hardware limitation.
vidiot Posted - 11/26/2005 : 07:21:42
The current level is 6. I've also tested it on another computer with the same problem. I sent it back to the guy I bought it from on ebay.

Also I noticed that there is no setting for a HN27C4096.
Is this a software limitation or hardware?

usb Posted - 11/25/2005 : 08:34:16
Check the USB current level. It should be at least at level 5 or above. By the way, where you send the programmer and repaired? You may need to contactv them again.
vidiot Posted - 11/22/2005 : 18:53:29
Well my repaired Programmer read eproms fine but does not write. I have tried changing the speed and it doesn't fix it. I have tried other computers same problem.

Anything I have missed?

vidiot Posted - 11/21/2005 : 14:26:35
Turns out that my unit was bad, They quickly repaired the unit and sent it back.

Now I can read the tms27c020 chip fine. I'm having problems writing the data back on to another chip "AM27C020 1200C" I verify that the chip is blank, It starts to write then gives an error. I tried slower speeds aswell.

Your help would be appreciated.


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