6.1.2 Frequency Measurement (FREQM)

Some PIC32CM device families include a Frequency Meter (FREQM) peripheral to measure the frequency of an external or internal clock signal with high accuracy and minimal CPU intervention, aiding in system calibration and ensuring timing accuracy. It is used for clock calibration, timekeeping, communication, instrumentation, and power metering.

Key Features

• Direct frequency measurement
• Selectable reference clock
• High resolution—Provides precise frequency readings, suitable for calibration, diagnostics, and clock monitoring
• Interrupt and event generation
• Low-power operation