System control determines the overall
operation of the CC23xx device. 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 Global low drop-out (GLDO) voltage regulators
- Handles the power-up
sequencing, power-down sequencing, and control for the core
digital-logic and analog circuits
- Low-power options for
on-chip modules:
- Software
controls shutdown of individual peripherals and memory
- SRAM is
retained in all power modes except shutdown
- Configurable wake up
from standby by RTC or any IOC interrupt
- Voltage supervision
circuitry
- Multiple clock sources for
microcontroller system clock:
- High Frequency
Clock:
- RC oscillator
(HFOSC): on-chip 48 MHz RC oscillator.
- External
oscillator (HFXT): external 48 MHz crystal oscillator
connected across the X48P input and X48N output pins.
- Radio
operation requires the external oscillator.
- Low Frequency
Clock:
- RC oscillator
(LFOSC): on-chip 32 kHz RC oscillator.
- External
oscillator (LFXT): external 32.768 kHz crystal oscillator
connected across the X32P input and X32N output pins.
- Designed for
accurate RTC operation or synchronous network timing.
- Used during
power-saving modes and for RTC.