3.17.14 Low Power Modes (Power)

PIC32 devices offer various methods and modes that allow the user to balance power consumption with device performance. Power plib provides interface to get into such low power modes. Some of the devices which supports deep sleep mode, it also provides additional functions to be used in deep sleep mode.

Using The Library

To enter into any of the power saving mode, user can call the API POWER_LowPowerModeEnter, in case the device supports deep sleep mode and user wants to use that, then the same can be first configured in MCC power plib configuration and then corresponding APIs can be used as needed.

Library Interface

Low Power Modes peripheral library provides the following interfaces:

Functions


Name	Description
POWER_LowPowerModeEnter	Puts the device in selected low power mode
POWER_Initialize	Initializes Deep Sleep controller of Power module
POWER_WakeupSourceGet	Returns the source of wakeup from deep sleep
POWER_ReleaseGPIO	Release GPIO pins
POWER_WakeupSourceClear	Clears the wakeup source
POWER_DSGPR_Write	Saves critical data in deep sleep state
POWER_DSGPR_Read	Reads saved data
POWER_DS_ExtendedSemaphoreDisable Function	Disables the general purpose register retention in the Deep Sleep mode
POWER_DS_ExtendedSemaphoreEnable Function	Enables the general purpose register retention in the Deep Sleep mode
POWER_DS_RTCC_PowerDisable Function	Disables the RTCC module in the Deep Sleep mode.
POWER_DS_RTCC_PowerEnable Function	Enables the RTCC module in the Deep Sleep mode
POWER_DS_RTCC_WakeupDisable Function	Disables the wake-up from RTCC
POWER_DS_RTCC_WakeupEnable Function	Enables the wake-up from RTCC
POWER_DS_SoftwareRestore Function	Releases I/O pins and allow their respective TRIS and LAT bits to control their states

Data types and constants


Name	Type	Description
POWER_LOW_POWER_MODE	Enum	Identifies low power mode options
POWER_WAKEUP_SOURCE	Enum	Identifies wake up sources from deep sleep mode
POWER_DSGPR	Enum	Identifies deep sleep GPRs