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EK-TM4C123GXL: IICDC

Kalyani Khergade
Prodigy 50 points
Part Number: EK-TM4C123GXL

How to provide external power supply to TIVA EK-TM4C123GXL  without  connecting USB ?

  • 0
    TI__Guru 72500 points
    You can connect +5V to J3 pin 1 and GND on J3 pin 2. The schematic is in appendix A of the User's Manual. J3 is shown on page 20.
    www.ti.com/.../spmu296.pdf
  • 0 in reply to Bob Crosby
    Prodigy 50 points
    Sir, on tiva TM4123GXL it is written as voltage of j3 pin 1 is 3.3v so how can we give +5 v to j3 pin 1. Wont it damage the launchpad TM4123GXL ?
  • 0 in reply to Kalyani Khergade
    TI__Guru 72500 points

    Perhaps you are confusing J3 with J1. J3 pin 1 is shown on the schematic as +VBUS. This is 5V.

    From the schematic:

    And from the table:

    I understand that the silkscreen on the top of the launchpad may be confusing. There was not enough room to print the name a each pin for J1 and J3 next to the corresponding pin, so the names are listed in two columns mimicking the pins themselves. The "+3.3V" refers to the leftmost pin, J1-1. The "VBUS" refers to the next pin, J3-1. I tried to indicate which pin is VBUS in the image below:

  • 0 in reply to Bob Crosby
    Guru 117855 points

    *** LIKE *** Terrific detail ... and as there exists a, "chance to misinterpret" the silk-screen ID - your explanation WAS "likely" required...

    Firm/I have seen (similar boards) add clarification by employing a, "multi-segment arrow" - which "flows" from the "label" - to the noted pin.    (this is done just once)

    Note too that there was room to,  "Double enter" the "PA7 label" - adding the 2nd "PA7" ID just beneath the physical pin.     (i.e. just below bottom pin row,  exterior/outside pin column)