Table 33-83. External clock with prescaler (1)for system clock.
Notes:
1.
System Clock Prescalers must be set so that maximum CPU clock frequency for device is not exceeded.
2.
The maximum frequency vs. supply voltage is linear between 1.6V and 2.7V, and the same applies for all other parameters with supply voltage conditions.
33.3.13.7 External 16MHz crystal oscillator and XOSC characteristics
Table 33-84. External 16MHz crystal oscillator and XOSC characteristics.