Jlinkx64sys May 2026

Traditionally, sending debug messages from an embedded microcontroller (MCU) to a PC requires a UART (Serial Port). This has significant drawbacks:

Cause: Power management on x64 host USB root hubs.
Fix: Disable USB selective suspend: jlinkx64sys

To extract maximum throughput (e.g., streaming over 50 MB/s via SWD), tweak these parameters: streaming over 50 MB/s via SWD)