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Are I/O pins in high impedance during PIC ICSP programing?

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PIC ICSP Programing

Hello!
I have a question about in-circuit serial programming of the PIC16F877. What I would like to know is if all I/O pins are in the high-impedance state during programming ( except for the programming pins )?

Best regards to you all
George
 

Re: PIC ICSP Programing

in-circuit serial programming of the PIC16F877 by low voltote programming

programming for win9x/me download from h..p://www.etteam.com/download/PIC877V21.EXE
 

Re: PIC ICSP Programing

hi nooknikz

what's the value of R in 16F877 board/MCLR circuit (low voltage hardware.pdf / p.1) ? can't read it on the pdf :evil:
this is certainly a critical value, as the Vpp generator has 1K on TL497 output

thx
 

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