Hot!ICD4 pinout

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swmcl
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2018/11/05 21:31:59 (permalink)
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ICD4 pinout

Hi,
 
I am struggling as I think there is an issue with the User Guide for the ICD4.  A response from a user with experience would be a little handy right now ...
 
On DS50002596C-page 66 there is a representation of the RJ45 socket on the ICD4 in Figure B-2.  The pinout shows pin1 at the bottom.
If I take their cable and plug it into a RJ12 socket that I have then I do agree with their pictures on the right-hand side of Figure B-4.
The table in Figure B-4 is upside down in that it should read as pins 1 to 6 and not 6 to 1 as I understand it.  Pin1 was the reserved pin in Figure B-2.
The table information in Figre B-3 is different also ... !  It lists pin1 to 6 but the information is again reversed.
 
What do I believe ?  What is the pinout of the RJ45 connector ?  Is it pin1 at the bottom ?
 
Given that I now have $250US worth of boards in process my enquiry may have come too late ...
 
Rgds,
Steve
#1

11 Replies Related Threads

    NKurzman
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    Re: ICD4 pinout 2018/11/05 22:44:10 (permalink)
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    I think the issue maybe in the definition of the RJ45 cable. But it is easy enough to crimp one end backwards so you can use your boards.
    #2
    Larry.Standage
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    Re: ICD4 pinout 2018/11/06 09:08:43 (permalink)
    5 (1)
    The RJ45 connector has 8 pins, but the 6 critical ones are the inner six, so an RJ11 cable can be connected and have the correct pins.
     
    The two outer pins are used for JTAG debugging.
    #3
    Jim Nickerson
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    Re: ICD4 pinout 2018/11/06 09:19:07 (permalink)
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    Larry,
    I wonder if there is no danger that inserting the RJ11 plug will bend the outer RJ45 contacts so they will be difficult to use with a RJ45 plug in the future ?
    Or is the RJ45 receptacle on the ICD 4 special ?
    #4
    NKurzman
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    Re: ICD4 pinout 2018/11/06 14:17:41 (permalink)
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    Well since I did not Notice they added 2 more pins to the ICD4, I guess not.  The Microchip 6 inch 6X8 RJ-45 cable does not appear to damage the 2 extra pins.  They are still all in a nice straight line.
    #5
    swmcl
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    Re: ICD4 pinout 2018/11/06 22:48:49 (permalink)
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    Respondees..
     
    Could I ask for a pinout diagram of a socket on a board and the respective pins ?
    My technical enquiry at Microchip has them asking me to buy a Universal Programmer so that we can 'talk the same language' ... !
    I have tested a low-resistance connection from pin 5 of their picture of the RJ45 in Figure B-4 to the ground of the external power port.  This would indicate to me that their RJ45 picture is correct for at least one pin !
    #6
    swmcl
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    Re: ICD4 pinout 2018/11/06 22:49:42 (permalink)
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    Is there a way to test the pins with a scope in a 'live' kind of way before plugging it into a board ?
    #7
    Jim Nickerson
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    Re: ICD4 pinout 2018/11/07 08:03:09 (permalink)
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    swmcl
    Is there a way to test the pins with a scope in a 'live' kind of way before plugging it into a board ?


    Maybe you could connect the included test board ?
    #8
    swmcl
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    Re: ICD4 pinout 2018/11/07 12:59:25 (permalink)
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    Hi Jim,
     
    Tried that !  The included test board is very sparse on detail and usability from that point of view.  Tiny little vias with no markings.  Given the money paid for the ICD4 they could supply a good breakout board for sure.  Very poor service in my opinion.  It would cost all of $2US on EBay if the Chinese were making and selling them ...
     
    Sadly, it looks as though I will have to just plug it in and see what happens.  A lot of the pins out of the ICD4 are protected and I have poured over the User Guide (which I might say has been substantially edited in the last couple of weeks from the 'C' version to the 'D' version in this particular section ...)
     
    Cheers,
    Steve
    #9
    qhb
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    Re: ICD4 pinout 2018/11/07 14:16:08 (permalink)
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    It's a test board, not a "breakout" board.
    You connect it, and run the self test.
     
    #10
    NKurzman
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    Re: ICD4 pinout 2018/11/07 15:37:03 (permalink)
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    The break out board is AC164110. ( actually a PICKIT2 to ICD2 adapter, that is still correct)
    Or you can buy a Chinese one on eBay.
     
    As for the Pinout Use the ICD3 one:
    https://ww1.microchip.com/downloads/en/DeviceDoc/DS-51765C.pdf
     
    Or the ICD4 Poster:
    http://ww1.microchip.com/...evicedoc/50002538a.pdf
     
    post edited by NKurzman - 2018/11/07 15:41:48
    #11
    swmcl
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    Re: ICD4 pinout 2018/11/08 23:42:23 (permalink)
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    q ... it would be really inconvenient for Microchip to build the one board with a few well-labelled vias large enough for a probe I admit.  Really, really inconvenient and costly.
     
    Thanks NK I'll check it out.
     
    The User Guide has undergone significant revision over the last few weeks (literally!) and the section pertaining to the pinouts is better but is still misleading in my view. 
     
    The new boards are in flight with FedEx so I'll find out in a few days time I guess.
    #12
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