[SOLVED] Can SWD Isolator can be used for Power Measurement tests?

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  • [SOLVED] Can SWD Isolator can be used for Power Measurement tests?

    We are trying to run some automated power measurement tests on Target hardware(running in 3.3v).
    We are using Jlink Base to flash Firmware into Target.
    Our flashing steps looks like below
    1)power on perm
    2)Flash Software into target
    3)power off perm


    We are trying to understand SWD isolator from Segger ,so that we could use to isolate the target HW form flashing tool that consumes some power.

    We need to know the power consumption if any by the isolation circuit itself(if any) after flashing
    I understand that at least we have some Led s in the target side.
    [img='https://www.segger.com/fileadmin/_processed_/0/7/csm_J-Link_SWD_Isolator_BlockDiagram_80cab56b1f.gif',none,225][/img]
    With the circuit mentioned here Isolator still consumes some power from target even if it is isolated.

    Since we are not sure of the design of SWD isolator itself,Could you please explain the if we can use SWD isolator for our tests?
  • Hello,

    Thank you for your inquiry.
    On the isolator site you can find more information about its power consumption on target side:
    segger.com/products/debug-prob…tors/j-link-swd-isolator/

    It is typically 25 mA. Maximum 40 mA.
    What it is in your particular setup case you would have to measure for your self.

    Best regards,
    Nino
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