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EK-TM4C1294XL: Parts required for using the LaunchPad capabilities on board layouts

Byron Blue
Prodigy 110 points
Part Number: EK-TM4C1294XL

Tool/software:

Good morning
We've been using two variants of the EK-TM4C1294XL LaunchPad beds for a few years now in development.
The first uses the Ethernet connection to read commands from the host then stream data from eight input lines (ports) back to the host. The port connections are coming from the BoosterPack headers.
The second controls our processor unit using most of the port lines on the 99 pin (breadboard) edge connector. This variant does not use an Ethernet connections.
We will be programming both variants using the DEBUG interface and supplying our own 3.3V power supply.
Now we are preparing to mount the required circuitry to the layout of the two boards. Could you please let us know which components from the LaunchPad unit will be required for each purpose? I'm guessing the complete package will not be required in the end.
Your assistance is greatly appreciated. Nice little board.
Byron Blue
Hardware and software engineering
MAQ Sonar

  • 0
    TI__Guru**** 191886 points
    Byron Blue said:
    Now we are preparing to mount the required circuitry to the layout of the two boards. Could you please let us know which components from the LaunchPad unit will be required for each purpose? I'm guessing the complete package will not be required in the end.

    Hi Byron,

      I will suggest you go through the BOM list as well as the schematic that is shown in EM-TM4C1294XL User's Guide. There are quite some components that you don't need for your final product. The LaunchPad has the on-board ICDI debug probe. I don't think you need this as I suppose you will add a JTAG connector to your own custom board so you can use popular debug probes (XDS110, XDS200, Seggar Jlink, etc) on the market that support TI's Arm-based processors. For sure on your second board, you do not need the RJ45, the transformers and all needed circuitries related to Ethernet interface. I don't know if you are using USB or not. If not, you do not need the USB micro-A connector either.  I don't know how you will be regulating the power supply. There are some voltage regulators on the board which you may or may not need depending if you are supplying power through USB or not. I can't really suggest what to remove because I have no familiarity with your final system. Again, please go through the BOM list and schematic and determine what you need or not need based on your requirements. 

  • 0 in reply to Charles Tsai
    Prodigy 110 points

    Thank you once again Charles

    We've never used JTAG but I guess this may be the way to go. I was intending to use the Micro USB B connector as it easily lets anyone here program the flash without effort. But I guess (even at the price of the XDS200) it is more cost effective than populating all of the required circuitry for each board. Time to start learning the emulator.

    Thank you again,

    Byron