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I'm not sure I understand what the problem is here or maybe I don't understand your question, but you only need the 877 and 4550 ICSP connectors to program those chips with the bootloaders the very first time. You'll only need to do this once normally, so you do so before closing the case you'll put your ICD2 clone inside.togarha said:If I make a smt version of potyo design, how can I put the ICSP connector for the two pics inside the ICD2 (PIC16F877 & PIC18F4550), must I short all lines in two pics (RB6, RB7, VCC, GND) except the MCLR which must be selected by a jumper (with pull-down resistor in two lines)? or how must I do it?
Isin't that what I just said? :?togarha said:SMT version does not need the same connections as non-SMT version because pics in DIP you can program outside the ICD-2 (in any programmer), but pics in TQFP you only can program when they are in the PCB, then, it need one ICSP connector to program two pics (only the first time, but it is needed)...
That is what I said... As for the connections, obviously you need to add the ICSP connectors, as NICK7's design incorporates. And NO, you don't need one ICSP connector but two. One for each chip!!! Many design variations with ICSP for both chips are in this topic already.you only need the 877 and 4550 ICSP connectors to program those chips with the bootloaders the very first time.
Have you tested this before saying it works? I see many post mods here that aren't sound and never tested. :!: I suspect RB6-7 from either chip will interfere with eachother. :| I urge you to test this out first.togarha said:About NICK7 design, it uses 2 ICSP connectors, ok, and a lot of jumpers, but: It is possible to use the schematic previosly stated by myself to use only one ICSP connector and only one jumper (Without put, it works as normal ICD, put in one point it programs one pic, and put in the other point, it programs the other pic...)...
PiCS said:Rev.C is double sided board with minor modification :
added pot for adjust Vpp(9v..14v)
added rezistor for mclr PIC18F4550
and change capacitor for oscilator with 12pF(C6,C7)
togarha said:I have potyo design in OrCAD, but it is not tested, I think it is right, but it is better other view...
I post it, if you find any error on it, tell me please...