3.2 Calibrated Internal RC Oscillator Accuracy

The accuracy for the Calibrated Internal RC Oscillator has been improved in ATmega328PB.

Table 3-2. Calibration Accuracy of Internal RC Oscillator under 8MHz Frequency
Test condition	Accuracy for ATmega328PB	Accuracy for ATmega328 variants
Factory calibration	±2%	±10%
User calibration	±1%	±1%

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