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Thread: PIC 16F628

  1. #1
    Hi, I have problem with building dejan box

    I have PIC 16F628 / 20
    I use hex by MTL
    I tried different crystal
    8mhz - bad box
    4mhz - flashing work, but m-bus commands don't work - calculating checksum, F1,...
    I have set fuses exactly as write MTL.
    I don't know where is a problem, anybody can help me with it?

    thx

    Pavel

  2. #2
    Join Date
    Mar 2002
    Location
    United Kingdom
    Posts
    330
    Hi Pavel

    Try changing the Oscillator fuse to HS instead of XT. It worked for some ppl

    Best of Luck....post ur response too

    Yasser

  3. #3
    I have the same problem like Pavel ??
    please help

    Ross

  4. #4

  5. #5
    Mas bud spatnej krystal, nebo ho zkus zapojit klasicky - z vyvodu krystalu kondenzatory 15-30 pF na zem.
    Nektery krystaly bez kapacitni zateze kmitaji na vyssich harmonickych.

  6. #6
    Hi,
    I've put 2 - 33p capacitors to the crystal but the same - BAD BOX

    Ross

  7. #7
    Review your box, my with a pic 16F628-04/p and HS oscillator works fine. With XT oscillator say bad conection.

    Bye

  8. #8

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