11.2.1 External Clock Sources
An external clock source can be used as the device system clock by performing the following
actions:
- Program the RSTOSC Configuration
bits to select the external clock source (RSTOSC =
111) - Program the FEXTOSC Configuration
bits to select the appropriate External Clock (EC) mode:
- ECH mode for oscillators operating at or above 16 MHz (FEXTOSC =
11) - ECL mode for oscillator operating below 16 MHz (FEXTOSC =
01)
- ECH mode for oscillators operating at or above 16 MHz (FEXTOSC =