+ 5VDC ----- 10K -------->|------- Term 1

When Vpp is applied to term 1, the diode is reverse
biased.

You do have to power the PIC during the programming.

Peter H Anderson, http://www.phanderson.com
WARP13 Reseller

--- Donovan Parks <dparks@UVIC.CA> wrote:
> Hello,
>
> I have a Newfoundland Electronics Warp13 programmer
> and would like to program my PIC16F877 using the ISP
> feature of the programmer and chip.
>
> The help file for the Warp13 is not entirely clear
> on how to correctly isolate the pins used in ISP.
> RB6 and RB7 are not being used in my application so
> these are easy (as is ground), but I am uncertain as
> to what 'isolation' circuits I should be using on
> Vpp(/MCLR) and Vdd.  The help file suggests either a
> diode or resistor on Vpp(/MCLR) - what is better?
> why? what value of resistor?  I am at a loss at how
> to isolate Vdd.
>
> Also, am I correct that my programmer will supply
> all power needed to do ISP (or should I be supplying
> +5V to the PIC)?
>
> Thanks for any and all help.
>
> Donovan
>
> --
> http://www.piclist.com hint: To leave the PICList
> mailto:piclist-unsubscribe-request@mitvma.mit.edu
>
>


__________________________________________________
Do You Yahoo!?
Send FREE video emails in Yahoo! Mail!
http://promo.yahoo.com/videomail/

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads