[ABANDONED] DAP error while reading DP-Ctrl-Stat register

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

  • [ABANDONED] DAP error while reading DP-Ctrl-Stat register

    Hi,
    I use a JLink-EDU to flash nRF52840 on macOS and meet an error. The JLink software version and error informations is below.



    If I connect the nTRST pin of JTAG to reset pin of MCU, it works well.
    I want to know what’s this error mean? Why it’s works well when connect nTRST pin?

    Looking forward to your reply!
  • Hello,

    Thank you for your inquiry.
    Such an issue is not known to us.
    You are using SWD so nTRST should not have any effect so we currently assume it has to do with your debug interface setup.
    Are you using an eval board or custom hardware?
    If eval board which one?
    In what context are you using this J-Link? Product development or how?
    Could you provide a J-Link log file of the failing session?
    wiki.segger.com/Enable_J-Link_log_file

    Could you also provide an excerpt from the board schematics of the debug interface?

    Best regards,
    Nino
    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.