20.2 Features

The following are key features of the OSCCTRL module.

  • 0.4-32 MHz Crystal Oscillator (XOSC)
    • Tunable gain control
    • Programmable start-up time
    • Crystal or external input clock on XIN I/O
    • Clock failure detection with safe clock switch
    • Clock failure event output
  • 16 MHz Internal Oscillator (OSC16M)
    • Fast startup
    • 4/8/12/16 MHz output frequencies available
  • Digital Frequency Locked Loop (DFLL48M)
    • Internal oscillator with no external components
    • 48 MHz output frequency
    • Operates stand-alone as a high-frequency programmable oscillator in open loop mode
    • Operates as an accurate frequency multiplier against a known frequency in closed loop mode
  • Fractional Digital Phase Locked Loop (FDPLL96M)
    • 48 MHz to 96 MHz output frequency
    • 32 kHz to 2 MHz reference clock
    • A selection of sources for the reference clock
    • Adjustable proportional integral controller
    • Fractional part used to achieve 1/16th of reference clock step