power_mode_switch_ll_mcxc#
Overview#
The power_mode_switch_ll demo application demonstrates the usage of low level power-related drivers(SPC, CMC, VBAT, WUU, and so on) to enter/exit different power modes. - WUU: Help pins and modules generate a temporary wake-up from Power Down or Deep Power Down mode. - CMC: Provide the sequencing of the CPU and associated logic through the different modes. - SPC: System power controller which is used to configure on-chip regulators in active/low-power modes.
The demo prints the power mode menu through the debug console, where the users can set the MCU to a specific power modes. Users can also select the wake-up source by following the debug console prompts. The purpose of this demo is to show how to switch between different power modes, and how to configure a wake-up source and wakeup the MCU from low power modes.
This demo demonstrates 4 level power modes: - Sleep: CPU clock is off, and the system clock and bus clock remain on. Most modules can remain operational. - Deep Sleep: Core, system, and bus clock are all off, some modules can remain operational with low power asynchronous clock source and serve as wake-up sources. - Power Down: Core, system, and bus clock are all off, the CORE power domain is put into retention mode which means modules in these domains are not operational. - Deep Power Down: The whole CORE domain is power gated. Both LDO_CORE is turn off. The device wakes from Deep Power Down mode through the Reset routine. This demo demonstrates 2 wake-up sources: - Timer: Located in System power domain, clocked by FRO16K which from VBAT. The timer is also enabled in WUU to wake-up device from power down and deep power down modes. - Button: The external pin which connected to WUU.