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Pic ICSP

Discussion in 'Electronic Design' started by Sampei, Feb 13, 2005.

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  1. Sampei

    Sampei Guest

    Hi,
    I would program PIC16F877A with ICSP.
    I used as programmer a jdm based (Pic-PG2 showed
    http://www.olimex.com/dev/) and as software ic-prog 1.05C.
    I tried a lot of configurations but nothing.
    One is showed below:

    [FIDOCAD ]
    LI 90 55 95 55
    LI 95 55 95 60
    MC 95 60 1 0 170
    MC 95 70 0 0 045
    MC 95 35 3 0 010
    LI 95 45 95 35
    LI 45 45 65 45
    LI 65 45 65 75
    LI 77 55 77 90
    LI 77 90 125 90
    MC 95 55 3 0 080
    TY 99 31 5 3 0 0 0 * +5
    TY 126 88 5 3 0 0 0 * ICSP
    SA 95 55
    LI 75 55 65 55
    TY 45 50 5 3 0 0 0 * /MCLR
    MC 90 55 2 0 200
    TY 70 50 5 3 0 0 0 * BAT48
    TY 100 50 5 3 0 0 0 * 1K
    TY 100 60 5 3 0 0 0 * 0.1uF
    LI 65 75 65 140
    TY 45 40 5 3 0 0 0 * PIC
    TY 50 95 5 3 0 0 0 * VDD
    TY 50 105 5 3 0 0 0 * VSS
    TY 50 115 5 3 0 0 0 * RB7
    TY 50 125 5 3 0 0 0 * RB6
    LI 65 110 125 110
    LI 65 120 125 120
    LI 65 130 125 130
    TY 125 105 5 3 0 0 0 * ICSP
    TY 125 115 5 3 0 0 0 * ICSP
    TY 125 125 5 3 0 0 0 * ICSP
    MC 95 110 0 0 045


    with and without the wire between the two Vdd. Later i proved this jdm
    configuration (http://www.jdm.homepage.dk/icsp.htm) but i used as diode
    BAT48: nothing.
    Now:
    1)There is any particular ic-prog setting to program with ICSP?
    2)Why during the programming the value of MCLR is 8 volt ?(I know that
    it shoud be 13v)
    3)Why I must use a Schottky diode?
    Thanks to all
     
  2. Luhan Monat

    Luhan Monat Guest

    I don't know what all that stuff is, but it sounds like this device is a
    long way from 'user friendly'!
     
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