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PICList Thread
'[PIC] ICD connector uncertainty for PIC18 series'
2006\07\30@021731 by Anon

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I am using the PIC18F4550 for a new design. I plan on having an RJ12 connector on the PCB to interface to a Microchip ICD2. The interface documentation seems a bit vauge. I saw one diagram that has pin of the target PCB RJ12 connector, connected the ICRST pin of the PIC, and then recommends that you find a way to lock MCLR# low when performing in-circuit debugging (perhaps an SPST switch).
 I also saw another document that you connect the same RJ12 pin to the MCLR pin of the pic instead of using the dedicated ICRST pin.
 I would appreciate some insight to best design practices.
 
 

               
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2006\07\30@030000 by Bob Axtell

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Anon wrote:
> I am using the PIC18F4550 for a new design. I plan on having an RJ12 connector on the PCB to interface to a Microchip ICD2. The interface documentation seems a bit vauge. I saw one diagram that has pin of the target PCB RJ12 connector, connected the ICRST pin of the PIC, and then recommends that you find a way to lock MCLR# low when performing in-circuit debugging (perhaps an SPST switch).
>   I also saw another document that you connect the same RJ12 pin to the MCLR pin of the pic instead of using the dedicated ICRST pin.
>   I would appreciate some insight to best design practices.
>    
>    
>
>                  
> ---------------------------------
> Do you Yahoo!?
>  Get on board. You're invited to try the new Yahoo! Mail Beta.
Yes, the ICD2 documentation is hopeless.

This attachment identifies the correct pinning for the ICD2 and exact
ICD2 clones at the ICD2.


--bob


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2006\07\30@033536 by Steve Smith

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Watch the lead it's a crossover lead caught me out once...
Steve

-----Original Message-----
From: spam_OUTpiclist-bouncesTakeThisOuTspammit.edu [.....piclist-bouncesKILLspamspam@spam@mit.edu] On Behalf Of
Bob Axtell
Sent: 30 July 2006 08:00
To: Microcontroller discussion list - Public.
Subject: Re: [PIC] ICD connector uncertainty for PIC18 series

Anon wrote:
> I am using the PIC18F4550 for a new design. I plan on having an RJ12
connector on the PCB to interface to a Microchip ICD2. The interface
documentation seems a bit vauge. I saw one diagram that has pin of the
target PCB RJ12 connector, connected the ICRST pin of the PIC, and then
recommends that you find a way to lock MCLR# low when performing in-circuit
debugging (perhaps an SPST switch).
>   I also saw another document that you connect the same RJ12 pin to the
MCLR pin of the pic instead of using the dedicated ICRST pin.
>   I would appreciate some insight to best design practices.
>    
>    
>
>                  
> ---------------------------------
> Do you Yahoo!?
>  Get on board. You're invited to try the new Yahoo! Mail Beta.
Yes, the ICD2 documentation is hopeless.

This attachment identifies the correct pinning for the ICD2 and exact
ICD2 clones at the ICD2.


--bob


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