14.2 Features
The following are key features of the SYSCTRL module:
- 0.4-32 MHz Crystal Oscillator (XOSC)
- Tunable gain control
- Programmable start-up time
- Crystal or external input clock on XIN I/O
- 32.768 kHz Crystal Oscillator (XOSC32K)
- Automatic or manual gain control
- Programmable start-up time
- Crystal or external input clock on XIN32 I/O
- 32.768 kHz High Accuracy Internal
Oscillator (OSC32K)
- Frequency fine tuning
- Programmable start-up time
- 32.768 kHz Ultra-Low Power Internal
Oscillator (OSCULP32K)
- Ultra-low power, always-on oscillator
- Frequency fine tuning
- Calibration value loaded from Flash Factory Calibration at Reset
- 8 MHz Internal Oscillator (OSC8M)
- Fast start-up
- Output frequency fine tuning
- 4/2/1 MHz divided output frequencies available
- Calibration value loaded from Flash Factory Calibration at Reset
- Digital Frequency Locked Loop (DFLL48M)
- Internal oscillator with no external components
- 48 MHz output frequency
- Operates standalone as a high-frequency programmable oscillator in Open-Loop mode
- Operates as an accurate frequency multiplier against a known frequency in Closed-Loop mode
- 3.3V Brown-Out Detector (BOD33)
- Programmable threshold
- Low-power sampling mode of operation
- Threshold value loaded from Flash User Calibration at start-up
- Triggers Resets or interrupts
- Hysteresis
- Internal Voltage Regulator system (VREG)
- Operating modes:
- Normal mode
- Low-Power mode
- With an internal non-configurable Brown-out Detector (BOD12)
- Operating modes:
- Voltage Reference System (VREF)
- Bandgap voltage generator with programmable calibration value
- Temperature sensor
- Bandgap calibration value loaded from Flash Factory Calibration at start-up