Martin,

You only need to reserve RB6 & RB7 (PGC/PGD) & MCLR for the ICD2. RB5 is
sometimes tied low to inhibit LVP, but in my experience this is not strictly
necessary, and the pin can be used as an IO pin. RB3 is not used by the
ICD2.

I often use RB6  & RB7 for ICD-2 & as an IO port for switches etc.

Peter Moreton




-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of
Buehler, Martin
Sent: 10 November 2004 08:28
To: Microcontroller discussion list - Public.
Subject: [PIC]: reserved pins for ICD / ICD2

in my designs, i always reserved pins RB3, RB6 and RB7 for ICD connection.

do I really have to reserve them all for ICD connection?

according to the ICD manual, RB6 and RB7 are used for ICD communication, but
RB3 is on the list of the ICD reserved pins. the ICD also has a connector
for RB3.

in the ICD2 manual, I see nothing about using RB3.

as I'm short on i/os, I don't like to waste pins in my actual design.

can anybody tell me, which pins I have to reserve for ICD or ICD2 and what
restrictions I have?

thank you very much.

tino

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