35.2.11 Internal Oscillator Speed Figure 35-84. ATmega168PB: Watchdog Oscillator Frequency vs. Temperature Figure 35-85. ATmega168PB: Watchdog Oscillator Frequency vs. VCC Figure 35-86. ATmega168PB: Calibrated 8MHz RC Oscillator Frequency vs. VCC Figure 35-87. ATmega168PB: Calibrated 8MHz RC Oscillator Frequency vs. Temperature Figure 35-88. ATmega168PB: Calibrated 8MHz RC Oscillator Frequency vs. OSCCAL Value