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Programming PIC onboard.

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coshkun

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I want to know the easiest way to program PIC on board.Yes i know ICSP.The high voltage applied to MCLR pin directly goes to VDD of my circuit doesnt it?.How can i prevent this?
 

Why is your MCLR pin connected directly to Vdd rail ? We usually use a resistor (10 kohm) between MCLR and Vdd, so when you apply 13V to MCLR to enter the programming mode, the resistor solves the problem.
 

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    coshkun

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I use a diode for this purpose (and a resistor in series). Anode towards Vdd, cathode to MCLR. During normal operation the diode is open, providing Vdd to MCLR. When programming MCLR get the ~13v but the diode is closed.
 

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    coshkun

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The hookup with both diode and resistor for some popular PICs is shown in detail on this document (download it from my site, Inchworm Quick Project)
**broken link removed**
 

Guys can i have the Programmer schematic diagram for PIC16F877A. can i have the Circuit diagram for the same.
 

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