All,
I have a question for the PIC community that has me stumped at the
moment. Here is the scenario.
I am using an ispPro programmer from Basic Micro. It works well, and we
have used it for a long time.
We have a 16F76 in one of our systems. I erased the program memory, and
reprogrammed it with different code.
At the end of the programming cycle, I get an error that the programmer
can't verify location $4000.
The top of the address space is $3FFF or at least I thought it was. I
looked at the datasheet, but didn't find anything
about address $4000. I thought it might be a system location that is
only availabe to the device programmer at program time.
Does anybody know what is significant about this location? When I do a
read, I see location $4000 is $80. When I erase it, it still says $80.
It should be $FF if it is truly erased I think. If I reprogram it with
the old firmware, I still get the error. It's like the bit is stuck
high. It can't be
programmed low.
Anyway, if anyone has any insight, let me know. I would appreciate it.
Thanks and Regards,
Jim
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