SEL=IRC
System PLL clock source select
| SEL | System PLL clock source 0 (IRC): IRC 1 (SYSTEM_OSCILLATOR): System oscillator. Crystal Oscillator (SYSOSC) 2 (RESERVED): Reserved 3 (32_KHZ_CLOCK): 32 kHz clock.Select this option when the 32 kHz clock is the clock source for the main clock and select the pll input in the MAINCLKSEL register. Do not use the 32 kHz clock with the PLL. |
| RESERVED | Reserved |