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EK-TM4C1294XL: Connection method equivalent to the J3 connector mounted on the DK-TM4C129X

Shigeki Tanzawa
Prodigy 80 points
Part Number: EK-TM4C1294XL

I am currently using DK-TM4C129X.
Considering the future, I am considering purchasing the EK-TM4C1294XL.

Currently, the J3 connector mounted on the DK-TM4C129X is used, and a 10P flat cable is used to connect to an external device.
The pin number used for connection is 1/3/5/7/9/11/13/15/17/19.
(The table below is the pin table of the J3 connector of DK-TM4C129X, which is taken from the user's guide.)

The conditions that cannot be changed are as follows.
    - The pinout of the external device cannot be changed from now.
    - You must also use the 10P flat cable you are currently using.

How can I connect to the EK-TM4C1294XL from the above conditions?
Do you need any additional devices?

  • 0
    TI__Guru*** 128195 points

    Hello Tanzawa-san,

    I apologize but I am not entirely following the question here. While I understand the question is relating to the differences in JTAG connectors on DK-TM4C129X and EK-TM4C1294XL, the actual usage of these connections with this '10-pin cable' is unclear.

    Are you basically saying your 10-pin cable is as follows?

    +3.3V
    TMS
    TCK
    TDO
    TDI
    /RESET
    U0RX
    U0TX
    /EXTDBG
    T_DISCONNECT

    Are you basically needing a solution where a '10-pin cable' can plug into the EK-TM4C1294XL to get the JTAG signals? Which of those signals are actually required by the external board and which are effectively NC's? I wouldn't think /EXTDBG or T_DISCONNECT would be necessary.

    Maybe what could help you some is the details about how to use the JTAG debug signals from the board covered in our JTAG User's Guide Section 4.8: https://www.ti.com/lit/pdf/spma075

    Best Regards,

    Ralph Jacobi

  • 0 in reply to Ralph Jacobi
    Prodigy 80 points

    Hello Jacobi-san,

    Information on the connector pin assignment on the external device side has been obtained.

    Will communication be possible with the above connection?

  • 0 in reply to Shigeki Tanzawa
    TI__Guru*** 128195 points

    Hello Tanzawa-san,

    As long as the appropriate resistors are removed per the documentation I shared, yes that would allow communication with your target device.

    Best Regards,

    Ralph Jacobi