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Thread: Adam J2 Debug connector pin-out

  1. #1
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    Question Adam J2 Debug connector pin-out

    Does anyone know the pin-out of the J2 Debug connector? It's got 10 pins and I'm guessing its an RS232 UART serial port but need to be sure because of level matching.

    Malata-motherboard-J2-Debug-Connector.762x485.jpg

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    Lightbulb

    OK, here are the details. I had figured it out a couple weeks ago by examining the circuits but I had been waiting for Rohit to confirm the connections for me, which he has now done.

    Looking at the photograph in my previous post the pins are numbered from right (pin 1) to left (pin 10). The J2 marking indicates pin 1.

    Code:
      1   JTAG_TCK
      2   JTAG_RTCK
      3   JTAG_TRST
      4   JTAG_TMS
      5   JTAG_TDI
      6   JTAG_TDO
      7   R-GND
      8   UART1_TXD
      9   UART1_RXD
    10   VDDIO_UART_3V3
    The connector is a 0.8mm pitch 10-way FFC (Flat Flexible Cable) receptacle. I'm sourcing some of these from China now.

    My intention is to design and build a small PCB module that will sit behind the rear-right curved cover. It will mount an external connector which will expose the serial and JTAG connections and antenna connections for the 3g auxillary, the Wifi diversity, FM radio RX and an external microphone. I'll probably mould a replacement curved cover that will have an aperture the external connector.
    The result will allow easy access for developers who want access to the boot-time serial console, in-depth control of the hardware via JTAG (maybe with a RiffBox), or users wanting to experiment with external antennas or use a professional microphone.

    I'll likely make up a few of these into modules that others can buy for a nominal fee from me. The only modification required would be to solder an FFC receptable onto the main PCB. Once that is done the external signals module can be connectd via flat flexible cable and the Adam used as normal with no wires hanging out or bits missing.
    Last edited by IntuitiveNipple; 06-08-2012 at 12:05 PM. Reason: Clarify confirmation was received from Rohit

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    I think RaYmAn knows the pinout if Rohit doesn't respond.

    Sent from my Galaxy Nexus using Tapatalk 2


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  5. #4
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    Quote Originally Posted by zerofeel View Post
    I think RaYmAn knows the pinout if Rohit doesn't respond.
    My post was meant to infer that Rohit has indeed confirmed this information - I wanted to ensure every other developer and user has access to it.

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