Just a small correction on what I have said.  I should have been a little
more specific.
1) MCLR/VPP and DBGMCLR/VPP should be pulled up to +5V with 10k resistors,
although in many applications, I have seen MCLR tied directly to +5V which
works OK if you are not using ICSP or a reset button.
2) NC pins should be just that - No Connection
3) ICDDATA and ICDCLK should be tied to Gnd when not in use.  This as I have
said, mirrors my stabilisation methods for my ICSP port.

-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Ian McLean
Sent: Friday, 7 February 2003 7:30 am
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [PIC]: From DIP to PLCC


IMHO, you should tie these pins to Gnd when not in use - as I have said -
this stabilised my ICSP port immensely, and the function of the ICD pins is
not really all that dissimilar.

-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Hazelwood Lyle
Sent: Friday, 7 February 2003 7:22 am
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [PIC]: From DIP to PLCC


Not according to DS4119A from Microchip.
For example,
18F458-I/P (PDIP) Shows Pin 1 as MCLR/VPP
18F458-I/L (PLCC) Shows Pin 1 as DBGMCLR/VPP and
                                Pin 2 as MCLR/VPP
18F458-I/L (PLCC) Shows Pin 17 as NC. This is the
        only NC pin shown for this package in this datasheet
18F458-I/L (PLCC) Shows pin 28 as ICDDATA, there is no comparable
        pin for the PDIP version.
18F458-I/L (PLCC) Shows pin 40 as ICDCLK, There is no comparable
        pin for the PDIP version.

They have apparently separated the ICD connections from the
shared I/O pins, allowing it to be more transparent to the
project being debugged. This is cool for those who use ICD.
I just wondered how best to terminate them if not being used.

Any suggestions would be welcomed.

Lyle


-----Original Message-----
From: Tim Webb [mailto:tim_webb@AGILENT.COM]
Sent: Thursday, February 06, 2003 2:09 PM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [PIC]: From DIP to PLCC


>Do you realize that you have (4) NC pins - usually those are the extra
(4) pins
>The ICDDATA, ICDCLK, DBMCLR/VPP pins should be terminated the same way
you did in the dip form



-----Original Message-----
From: Hazelwood Lyle [mailto:LHazelwood@MFGNC.COM]
Sent: Thursday, February 06, 2003 10:48 AM
To: PICLIST@MITVMA.MIT.EDU
Subject: [PIC]: From DIP to PLCC


I am moving a project from  18F458 DIP to PLCC.
The "extra" four pins are marked:

NC
ICDDATA
ICDCLK
DBMCLR/VPP

I can handle the NC, but how (if at all)
should I terminate the other three?

I checked the datasheet, but only found the
purpose for the pins, no info on suggested
termination if they aren't being used.

I am NOT planning any debugger connection,
I just want to place them in a stable,
inactive state.

Any suggestions would be welcomed.

Lyle Hazelwood

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