[SOLVED] SWD isolator power

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  • [SOLVED] SWD isolator power

    Hello
    I have got a JLink plus and SWD isolator
    From the User manual UM08021-R1, I understand that I can power the target from J-Link via SWD isolator
    "The target side draws power from pins 1 or 2, the emulator side draws power
    from pin 19. "

    Pins 1 or 2 are the pins from the target connector and pin 19 is from the emulator connector , right ? You do not say explicity which connector.
    I do not see any dc-dc isolator which can transfer power from emulator side to target side.

    If i power the target from pins 1 or 2 from the emulator connector , then the isolation looses its purpose.


    It would be usefull to provide a Jlink with a dc-dc converter.
  • Hi,

    You did get it wrong.
    You cannot power a target via SWD isolator.
    Actually, the SWD isolator needs to be powered by the target.
    It has 2 sides:
    Emulator / J-Link
    Target

    The Emulator side is powered by J-Link via pin 19.

    The target side is powered by pin 1 and draws current from the target on this pin.
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