embedded debug_error ai_generated true

JTAG: target connection lost during debug

ID: embedded/jtag-connection-lost

Also available as: JSON · Markdown
78%Fix Rate
82%Confidence
3Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
32 active — — —

Root Cause

JTAG/SWD debug connection dropped.

generic

Workarounds

  1. 88% success Reduce SWD clock speed: typically 1-4 MHz works reliably
  2. 85% success Check debug connector wiring and cable length

Dead Ends

Common approaches that don't work:

  1. Force JTAG reset continuously 78% fail

    May prevent firmware from running

  2. Increase JTAG clock to maximum 82% fail

    Signal integrity issues