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MSP432E401Y: MSP-EXP432E401Y

gerald mori
Prodigy 10 points
Part Number: MSP432E401Y
Other Parts Discussed in Thread: TPS2052B

Tool/software:

which pins/connector do I connect an external DC power supply to power up this circuit board

  • 0
    Guru 42085 points

    I assume you mean the launchpad:

    Disconnect the power pins from J101 and connect your power supply there. I don't think you need the 5 V, just 3.3. You can verify this with the schematic.

  • 0
    TI__Guru**** 191886 points

    Thanks to Keith for his answer. Please also refer to the MSP-EXP432E401Y LaunchPad User's Guide for selecting power source.  

    2.1.6.4 Other Headers and Jumpers
    JP1 is provided to select the 5-V power input source for the Ethernet LaunchPad development kit. The left
    position is for BoosterPack plug-in module power; this position also disconnects both USB voltages from
    the board’s primary 5-V input. In the left position, the TPS2052B does not limit current so additional care
    should be exercised. The middle position draws power from the USB connector on the bottom of the board
    near the Ethernet jack. The right position is the default, in which power is drawn from the XDS-110 USB
    connection through J101. If JP1 is in the left or middle position, which selects the BoosterPack headers or
    the USB OTG connector, respectively, externally provide 3.3 V to the board, and remove the 3V3 jumper
    on J101.

  • 0 in reply to Charles Tsai
    Prodigy 10 points

    I really appreciate everyone's quick feedback on this topic.  Question, with the info shown below also work in powering up this circuit board, connecting 5Vdc to J13-1:       Do I still need to make jumper changes to JP1? and J101?  Thanks again for everyone's time and help. 

  • 0 in reply to gerald mori
    Guru 42085 points

    You can certain apply the power there, but you should disconnect the jumpers on J101 to prevent back-powering the regulator.

  • 0 in reply to Keith Barkley
    Prodigy 10 points

    So remove the 5V jumper on J101, correct, everything else stays the same

  • 0 in reply to gerald mori
    Guru 42085 points

    And 3.3. There is no 3.3 V regulator below J101, so you need to supply both 5 V and 3.3 V. (Check the schematic to make sure I am not lying to you.)