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Thread: PIC 16F628

  1. 22-02-2002, 12:07 AM #1
    ||Joe
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    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
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  2. 22-02-2002, 01:28 AM #2
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    Yasser
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    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
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  3. 22-02-2002, 02:51 AM #3
    masterross
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    I have the same problem like Pavel ??
    please help

    Ross
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  4. 22-02-2002, 10:38 AM #4
    ||Joe
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  5. 22-02-2002, 12:00 PM #5
    ||Joe
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    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.
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  6. 22-02-2002, 12:44 PM #6
    masterross
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    Hi,
    I've put 2 - 33p capacitors to the crystal but the same - BAD BOX

    Ross
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  7. 22-02-2002, 02:47 PM #7
    o_MAST
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    Review your box, my with a pic 16F628-04/p and HS oscillator works fine. With XT oscillator say bad conection.

    Bye
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  8. 22-02-2002, 04:46 PM #8
    masterross
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