How to measure CPU Speed

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Measuring CPU speed

If the target CPU speed is not known it can be measured with J-Link Commander or J-Link SWO Viewer.

Measuring with J-Link Commander

  • Open J-Link Commander
  • Connect to your device
  • Execute "testcspeed <RamAddress>"
Measure CPU clock in J-Link Commander

Measuring with J-Link SWO Viewer

  • Open J-Link SWO Viewer
  • Select target device
  • Click measure
Measure SWO clock