SWCU185G January 2018 – June 2024 CC1312PSIP , CC1312R , CC1352P , CC1352R , CC2642R , CC2642R-Q1 , CC2652P , CC2652PSIP , CC2652R , CC2652RB , CC2652RSIP , CC2662R-Q1
Power and clock management (PRCM) in the CC13x2 and CC26x2 device platform is highly flexible to facilitate low-power applications. The following sections describe details for clock and power control in addition to covering reset features.
The features in this chapter are embedded and optimized in TI-RTOS. TI-RTOS users may regard this chapter as informative only.
Figure 8-1 shows the hierarchy of power-saving features in the CC13x2 and CC26x2 device platform. Low-power consumption and cycling time for a power-saving mode is inversely proportional. The power-saving mode with the lowest power consumption requires the longest time from initiation to power-saving mode, as well as wake-up time back to active mode. Table 8-1 summarizes the power-saving features.
Power-Saving Feature | Description |
---|---|
Clock gating | Immediate response—no latency. This feature offers the least amount of power saved |
Power domain off (overrides clock gating) | Power cycling down and up takes longer time than clock gating. Modules in power domains without retention must be reinitialized before functionality can be resumed. |
Voltage regulator off | Power cycling down and up takes a longer time than power domain cycling. The CC13x2 and CC26x2 device platform loses all configurations and will boot at wake up. This feature offers the least possible current consumption. |
Table 8-2 lists the four defined power modes for the power-saving features in TI-RTOS listed in Table 8-1. Section 8.6 discusses the power modes in detail.
Power Mode | Description |
---|---|
Active mode | The system CPU is running. |
Idle mode | The CPU power domain is powered off. |
Standby mode | All power domains are powered off, and the AUX domain is in low-power or power-down mode. The voltage domains are supplied by the micro LDO. |
Shutdown mode | Only I/Os maintain their operation. All voltage regulators, voltage domains, and power domains are off. |