System control determines the overall operation of the CC13x2x7 and
CC26x2x7 device platform. System control provides information about the devices, controls power-saving features, controls the clocking of the devices and individual peripherals, and handles reset detection and reporting.
- Power control:
- On-chip fixed DC/DC converter and low drop-out (LDO) voltage regulators
- Handles the power-up sequencing, power-down sequencing, and control for the core digital-logic and analog circuits
- Low-power options for the microcontroller
- Low-power options for on-chip modules:
- Software controls shutdown of individual peripherals and memory
- RAM and configuration registers are retained in all power modes
- Control-pin option for control of external DC/DC regulator
- Configurable wake up from sleep timer or any GPIO interrupt
- Voltage supervision circuitry
- Multiple clock sources for microcontroller system clock:
- High Frequency Clock:
- RC oscillator (RCOSC_HF): on-chip 48 MHz RC oscillator.
- External oscillator (XOSC_HF): external 48 MHz crystal oscillator connected across the X48M_P input and X48M_N output pins.
- Radio operation requires the external oscillator.
- Low Frequency Clock:
- RC oscillator (RCOSC_LF): on-chip 32 kHz RC oscillator.
- External oscillator (XOSC_LF): external 32.768 kHz crystal oscillator connected across the X32K_Q1 input and X32K_Q2 output pins.
- External signal: an external 32.768 kHz clock signal can be supplied by using one of the digital input/output (DIO) pins as clock input.
- Ideal for accurate RTC operation or synchronous network timing.
- Used during power-saving modes and for RTC.
- CPU and periphery clock division options