The AM263x does not support low power mode, where the device can be controlled to reduce power consumption when the processors and peripherals are not active. Lower power consumption comes at the cost of longer time for recovery to a running mode.
Power states in the system can be defined in terms of controlled power consumption:
- ACTIVE State: This is an initial state after the device is powered on. All the control register, processors and IPs are in active state and clock is running for entire logic. This is the normal state of device functioning.
- STANDBY State: This is state defined by the power state of the processor and IP clock gating. The system processor supports low power mode where the processor cores go into low power state and internally disables the clock to reduce power consumption. This can be achieved by WFI/WFE instruction execution on the core. Details of WFI/WFE power states can be found at Arm Cortex-R52 Processor Technical Reference Manual. Additionally, IP clocks needs to be gated to reduce dynamic power consumption in the IP.
- OFF State:This is the OFF state of the device where all the external power supplies are turned off and PORz is asserted. During OFF state device is not active and power up sequence should be executed to power it up.
Figure 6-16 depicts the valid power modes for the device.