J-Link BASE - Target consumption

    This site uses cookies. By continuing to browse this site, you are agreeing to our Cookie Policy.

    • J-Link BASE - Target consumption

      Hi,

      J-Link BASE user here (HW Version 12, J-lInk software version 7.96b). We are looking after the target consumption feature of the J-Link to screen any board/assembly-level defect at device production. For this we use the hwinfo or showhwstatus command to fetch the ITarget value. The target is powered by the J-Link.

      However, we find that the value reported by those commands (and even the reported target consumption in the control panel) is all over the place. For a constant 5.7mA current drawn from the J-Link by the board (measured with a Keysight 34465A), the reported ITarget by hwinfo/showhwstatus is always 12mA. The control panel however shows different numbers: it is never steady and can go from 1mA to 10mA, as shown in the attached screenshot.

      We know SEGGER states that power profiling feature is available on ULTRA/PRO version of the J-Link, but we don't need that much resolution on the target consumption. It seems however that the values reported by the J-Link looks quite odd in the first place. Possibly a bug?

      Best regards,

      Nicolas
      Images
      • jlink_control_panel_power_info.png

        28.68 kB, 1,419×797, viewed 83 times
    • Hello,

      The resolution that J-Link can measure is approximately 12mA, so the measurement may vary significantly when the target consumption is below that.

      Best regards,
      Simon
      Please read the forum rules before posting.

      Keep in mind, this is *not* a support forum.
      Our engineers will try to answer your questions between their projects if possible but this can be delayed by longer periods of time.
      Should you be entitled to support you can contact us via our support system: segger.com/ticket/

      Or you can contact us via e-mail.