The Sensor Controller is an autonomous processor that can control the peripherals in the Sensor Controller
independently of the system CPU. This means that the system CPU does not have to wake up, for example to
perform an ADC sampling or poll a digital sensor over SPI, thus saving both current and wake-up time that would
otherwise be wasted. The
tool enables the user to program the Sensor Controller,
control its peripherals, and wake up the system CPU as needed. All Sensor Controller peripherals can also be
controlled by the system CPU.
Note
The power, RF and clock management for the CC2652PSIP device require specific configuration and
handling by software for optimized performance. This configuration and handling is implemented in
the TI-provided drivers that are part of the CC2652PSIP software development kit (SDK). Therefore,
TI highly recommends using this software framework for all application development on the device.
The complete
with TI-RTOS (optional), device drivers, and examples are offered free of charge in
source code.
9.13 Clock Systems
The CC2652PSIP device has several internal system clocks.
The 48 MHz SCLK_HF is used as the main system (MCU and peripherals) clock. This can be driven by the
internal 48 MHz RC Oscillator (RCOSC_HF) or in-package 48 MHz crystal (XOSC_HF). Note that the radio
operation runs off the included, in-package 48 MHz crystal within the module.
SCLK_MF is an internal 2 MHz clock that is used by the Sensor Controller in low-power mode and also for
internal power management circuitry. The SCLK_MF clock is always driven by the internal 2 MHz RC Oscillator
(RCOSC_MF).
SCLK_LF is the 32.768 kHz internal low-frequency system clock. It can be used by the Sensor Controller for
ultra-low-power operation and is also used for the RTC and to synchronize the radio timer before or after
Standby power mode. SCLK_LF can be driven by the internal 32.8 kHz RC Oscillator (RCOSC_LF) or the
included, in-package 32.768 kHz crystal within the module.
When using the included, in-package crystal within the module, or the internal RC oscillator, the device can
output the 32 kHz SCLK_LF signal to other devices, thereby reducing the overall system cost.
9.14 Network Processor
Depending on the product configuration, the CC2652PSIP device can function as a wireless network processor
(WNP - a device running the wireless protocol stack with the application running on a separate host MCU), or as
a system-on-chip (SoC) with the application and protocol stack running on the system CPU inside the device.
In the first case, the external host MCU communicates with the device using SPI or UART. In the second case,
the application must be written according to the application framework supplied with the wireless protocol stack.
SWRS263A – FEBRUARY 2021 – REVISED JUNE 2022
46
Copyright © 2022 Texas Instruments Incorporated
Product Folder Links: