TCS Pune

GPIO damage testing

Guided diagnostic

GPIO damage testing

Test pin input and output behaviour against a known-good pin.

High riskAll GPIO-capable MCUs

Tools checklist

  • Digital multimeternUSB data cablenCurrent-limited bench supplynLogic analyser or oscilloscope when indicated

Symptom-to-checkpoint workflow

Start at checkpoint 1. Record the reading, then choose Pass or Fail to follow the correct branch.

Checkpoint 1 · Protection check

Method: Power off and inspect series resistor, clamp and pin voltage history

Expected: No overvoltage or overcurrent evidence

⚠ Do not inject voltage above the powered rail.

Record this diagnostic run

Log in to save measurements and submit this run to an instructor.

Bench safety

Disconnect power before wiring changes or continuity testing. Confirm polarity and voltage limits. Use a current-limited supply for suspected shorts.

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