"locked" PIC

Reply to Thread

Discussion in 'Embedded Systems and Microcontrollers' started by mik3, Jul 18, 2008.

Reply to Thread
  1. Jul 18, 2008 #1
    mik3

    Thread Starter Senior Member

    Feb 4, 2008
    4,846
    69
    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?
     
    #1 Reply
  2. Jul 19, 2008 #2
    bertus

    Administrator

    Apr 5, 2008
    18,609
    3,606
    #2 Reply
  3. Jul 20, 2008 #3
    n9352527

    AAC Fanatic!

    Oct 14, 2005
    1,198
    5
    Can you read them (either program memory or EEPROM)? Try erasing the entire chip first and see what happens.
     
    #3 Reply
  4. Jul 20, 2008 #4
    mik3

    Thread Starter Senior Member

    Feb 4, 2008
    4,846
    69
    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?
     
    #4 Reply
Loading...
Related Forum Posts:
  1. allahjane

    Locked ATMEGA8

    Posted by allahjane in forum: Embedded Systems and Microcontrollers
    Replies:
    3
    Views:
    1,450
  2. Ashu93

    Phase Locked Loop

    Posted by Ashu93 in forum: Homework Help
    Replies:
    8
    Views:
    1,897
  3. THE_RB

    Xtal-locked DDS audio sine generator with just a PIC 18F1320

    Posted by THE_RB in forum: The Projects Forum
    Replies:
    27
    Views:
    7,613
  4. samski

    Phase locked loops

    Posted by samski in forum: Homework Help
    Replies:
    26
    Views:
    5,497
  5. R!f@@

    Another locked thread

    Posted by R!f@@ in forum: Feedback and Suggestions
    Replies:
    5
    Views:
    1,949
You May Also Like:

  1. How Pairing Drones with AI, the IoT, and RFID Tracking Is Making Business More Efficient

  2. Nonvolatile Resistance Switching in Atom Thin Memristors

  3. Troubleshooting Tools for Your Next Bluetooth LE Project: Ubertooth and the Nordic nRF Sniffer


Load More Articles