Power Management - Texas Instruments SimpleLink CC2651R3SIPA Manual

CC2651R3SIPA
SWRS278B – FEBRUARY 2022 – REVISED AUGUST 2023

9.11 Power Management

To minimize power consumption, the CC2651R3SIPA supports a number of power modes and power
management features (see
MODE
CPU
Flash
SRAM
Supply System
Register and CPU retention
SRAM retention
48 MHz high-speed clock
(SCLK_HF)
32 kHz low-speed clock
(SCLK_LF)
Peripherals
Wake-up on RTC
Wake-up on pin edge
Wake-up on reset pin
Brownout detector (BOD)
Power-on reset (POR)
Watchdog timer (WDT)
In Active mode, the application system CPU is actively executing code. Active mode provides normal operation
of the processor and all of the peripherals that are currently enabled. The system clock can be any available
clock source (see Table 9-1).
In Idle mode, all active peripherals can be clocked, but the Application CPU core and memory are not clocked
and no code is executed. Any interrupt event brings the processor back into active mode.
In Standby mode, only the always-on (AON) domain is active. An external wake-up event or RTC event is
required to bring the device back to active mode. MCU peripherals with retention do not need to be reconfigured
when waking up again, and the CPU continues execution from where it went into standby mode. All GPIOs are
latched in standby mode.
In Shutdown mode, the device is entirely turned off (including the AON domain), and the I/Os are latched with
the value they had before entering shutdown mode. A change of state on any I/O pin defined as a wake from
shutdown pin wakes up the device and functions as a reset trigger. The CPU can differentiate between reset in
this way and reset-by-reset pin or power-on reset by reading the reset status register. The only state retained in
this mode is the latched I/O state and the flash memory contents.
The power, RF and clock management for the CC2651R3SIPA 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 CC2651R3SIPA software development kit (SDK).
Therefore, TI highly recommends using this software framework for all application development on
the device. The complete
of charge in source code.
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Table 9-1).
Table 9-1. Power Modes
SOFTWARE CONFIGURABLE POWER MODES
ACTIVE
Active
On
On
On
Full
Full
XOSC_HF or
RCOSC_HF
XOSC_LF or
RCOSC_LF
Available
Available
Available
On
On
On
Available
SDK with TI-RTOS (optional), device drivers, and examples are offered free
Product Folder Links:
IDLE STANDBY
Off Off
Available Off
On Retention
On Duty Cycled
Full Partial
Full Full
XOSC_HF or
Off
RCOSC_HF
XOSC_LF or XOSC_LF or
RCOSC_LF RCOSC_LF
Available Off
Available Available
Available Available
On On
On Duty Cycled
On On
Available Paused
Note
Copyright © 2023 Texas Instruments Incorporated
CC2651R3SIPA
www.ti.com
RESET PIN
HELD
SHUTDOWN
Off Off
Off Off
Off Off
Off Off
No No
No No
Off Off
Off Off
Off Off
Off Off
Available Off
On On
Off Off
Off Off
Off Off