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fixter

4 Posts
Posted - 03/22/2012 :  07:00:30  Show Profile  Reply with Quote
Using a GQ-4X with an ADP-015, I can erase chip but I can't write it. When I read the lock it says in protected mode 4. Unprotect is always greyed out. To get it erased I have to run protect under lock first. Once its erased to all FF's I can't get it to write. I tried the PLCC socket with that version of the chip which were blank to start with and it seems to work ok. I have to run protect on it before each procedure. The DIP chips I am using are previously used. Any help?
Reply #1

ZLM

2945 Posts
Posted - 03/27/2012 :  21:40:01  Show Profile  Reply with Quote
Try to use slower speed.
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Reply #2

fixter

4 Posts
Posted - 04/04/2012 :  10:03:22  Show Profile  Reply with Quote
Have tried all speeds and nothing is written. I can write to 89C52 ok though.
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Reply #3

cain

USA
1 Posts
Posted - 04/18/2012 :  00:36:26  Show Profile  Reply with Quote
nice info on your post.
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