Internal Oscillator Speed

Figure 1. ATmega168PB: Watchdog Oscillator Frequency vs. Temperature

Figure 2. ATmega168PB: Watchdog Oscillator Frequency vs. V_CC

Figure 3. ATmega168PB: Calibrated 8MHz RC Oscillator Frequency vs. V_CC

Figure 4. ATmega168PB: Calibrated 8MHz RC Oscillator Frequency vs. Temperature

Figure 5. ATmega168PB: Calibrated 8MHz RC Oscillator Frequency vs. OSCCAL Value