Datasheet

2.1.8 Power management

The Power Management Controller (PMC) expands upon ARM’s operational modes

of Run, Sleep, and Deep Sleep, to provide multiple configurable modes. These modes

can be used to optimize current consumption for a wide range of applications. The

WFI or WFE instruction invokes a Wait or a Stop mode, depending on the current

configuration. For more information on ARM’s operational modes, See the ARM®

Cortex User Guide.

The PMC provides High Speed Run (HSRUN), Run (Run), and Very Low Power Run

(VLPR) configurations in ARM’s Run operation mode. In these modes, the MCU core

is active and can access all peripherals. The difference between the modes is the

maximum clock frequency of the system and therefore the power consumption. The

configuration that matches the power versus performance requirements of the

application can be selected.

The PMC provides Wait (Wait) and Very Low Power Wait (VLPW) configurations in

ARM’s Sleep operation mode. In these modes, even though the MCU core is inactive,

all of the peripherals can be enabled and operate as programmed. The difference

between the modes is the maximum clock frequency of the system and therefore the

power consumption.

The PMC provides Stop (Stop), Very Low Power Stop (VLPS), Low Leakage Stop

(LLS), and Very Low Leakage Stop (VLLS) configurations in ARM’s Deep Sleep

operational mode. In these modes, the MCU core and most of the peripherals are

disabled. Depending on the requirements of the application, different portions of the

analog, logic, and memory can be retained or disabled to conserve power.

The Nested Vectored Interrupt Controller (NVIC), the Asynchronous Wake-up

Interrupt Controller (AWIC), and the Low Leakage Wake-Up Controller (LLWU) are

used to wake up the MCU from low power states. The NVIC is used to wake up the

MCU core from WAIT and VLPW modes. The AWIC is used to wake up the MCU

core from STOP and VLPS modes. The LLWU is used to wake up the MCU core

from LLS and VLLSx modes.

For additional information regarding operational modes, power management, the

NVIC, AWIC, or the LLWU, please refer to the Reference Manual.

The following table provides information about the state of the peripherals in the

various operational modes and the modules that can wake MCU from low power

modes.

Overview

Kinetis KL82 Microcontroller, Rev. 3, 08/2016

NXP Semiconductors