SWCU194 March 2023 CC1314R10 , CC1354P10 , CC1354R10 , CC2674P10 , CC2674R10
Power and clock management (PRCM) in the CC13x4x10 and CC26x4x10 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’s Power Manager. Please see the SimpleLink SDK Power Management: MSP432, MSP432E4, CC13xx/CC26xx, and CC32xx User’s Guide for more details.
Figure 7-1 shows the hierarchy of power-saving features in the CC13x4x10 and CC26x4x10 device platform. Low-power consumption and cycling time for a power-saving mode has an inverse relationship. 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 7-1 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 longer time than power domain cycling. The CC13x4x10 and CC26x4x10 device platform loses all configurations and will boot at wake up. This feature offers the least possible current consumption. |
Table 7-2 lists the four defined power modes for the power-saving features in TI's Power Manager listed in Table 7-1. Section 7.6 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 state. All voltage regulators, voltage domains, and power domains are off. |