"locked" PIC

Thread Starter

mik3

Joined Feb 4, 2008
4,846
hi guys,
I bought some new PIC18f4685, I programmed two of them 3-4 times and now i cant program them any more. It seems they have been locked. I cant see the reason because the configuration bits are not set to code protection. If the configuration bits were wrong then i couldnt program it for a second time but i did 3-4 times and then it locked. Now, i am afraid to program the others because they may get locked.

Do you know why this happens?
 

n9352527

Joined Oct 14, 2005
1,198
Can you read them (either program memory or EEPROM)? Try erasing the entire chip first and see what happens.
 

Thread Starter

mik3

Joined Feb 4, 2008
4,846
Can you read them (either program memory or EEPROM)? Try erasing the entire chip first and see what happens.
I cant read them, it reads only FFFF. I erased all the chip from the programmers options but nothing changes. Is there any other ways to erase the chip?
 
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