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 True USB Willem Programmer (GQ-2X,3X,4X & GQ-4x4)
 AT89S52 DIP

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T O P I C    R E V I E W
fixter Posted - 03/22/2012 : 07:00:30
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?
3   L A T E S T    R E P L I E S    (Newest First)
cain Posted - 04/18/2012 : 00:36:26
nice info on your post.
fixter Posted - 04/04/2012 : 10:03:22
Have tried all speeds and nothing is written. I can write to 89C52 ok though.
ZLM Posted - 03/27/2012 : 21:40:01
Try to use slower speed.

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