Lemme think about this...
- Prog MCLR floats, no problem.
- Prog MCLR goes to >12V, the diode blocks this from the
        app-circuit Vdd.
- Prog MCLR goes to ground, the diode is now forward-biased
        with the app-Vdd, and pretty much shorts to ground.
        Ouch!

Good idea.  I'll drop a few-K resistor in series with the
diode, so I now have:
        App-Vdd -to- diode -to- resistor -to- MCLR.

Thanks much,
-Neil.




-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Sid Weaver
Sent: Wednesday, June 26, 2002 5:06 PM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [PIC]: Tait --> ICSP. Ready, set...


Neril, I think MCLR has to go low during programming, not sure.  I would use
a pullup resistor on MCLR just to be safe.

Sid

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