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Helpful ReplyHot!ICD2 with original MPLAB ICD (ICD1) demo board

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torsteins
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2020/02/21 11:06:19 (permalink)
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ICD2 with original MPLAB ICD (ICD1) demo board

Is the demo board that was included with the ancient MPLAB ICD Evaluation Kit (DV164001) compatible with the newer (but also quite old) ICD2, or later ICDs for that matter?
 
Comparing their user manuals, it seems that the pin-outs of the modular connectors are the same, except that RB3 (pin 6 on the ICD, pin 1 on the demo/target board) is unconnected on the ICD2. So may I assume that a pull-down should be connected to RB3/PGM to prevent the PIC from entering Low Voltage Programming mode?
 
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GeorgePauley
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Re: ICD2 with original MPLAB ICD (ICD1) demo board 2020/02/21 12:25:58 (permalink) ☄ Helpfulby torsteins 2020/02/21 17:04:58
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As far as I remember, that board will work with all ICDs.  I don't think we've ever changed that connector.  I'm not sure about the RB3 pin, but I don't think you need to worry about.  #yourmileagemaydiffer
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ric
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Re: ICD2 with original MPLAB ICD (ICD1) demo board 2020/02/21 14:02:29 (permalink) ☄ Helpfulby torsteins 2020/02/21 17:04:54
+1 (1)
GeorgePauley
... I'm not sure about the RB3 pin, but I don't think you need to worry about.  #yourmileagemaydiffer

It depends what PIC is on that board.
If it has a PGM pin, and there isn't a pulldown on that board, then yes you DO need to pull it down.
Otherwise programming will sometimes work and sometimes fail, depending upon temperature, humidity, adjacent electric fields, and most probably what you had for breakfast...
 

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