Data Structures
struct	llwu_version_id_t
	IP version ID definition. More...

struct	llwu_param_t
	IP parameter definition. More...

struct	llwu_external_pin_filter_mode_t
	An external input pin filter control structure. More...

Enumerations
enum	llwu_external_pin_mode_t { kLLWU_ExternalPinDisable = 0U, kLLWU_ExternalPinRisingEdge = 1U, kLLWU_ExternalPinFallingEdge = 2U, kLLWU_ExternalPinAnyEdge = 3U }
	External input pin control modes. More...

enum	llwu_pin_filter_mode_t { kLLWU_PinFilterDisable = 0U, kLLWU_PinFilterRisingEdge = 1U, kLLWU_PinFilterFallingEdge = 2U, kLLWU_PinFilterAnyEdge = 3U }
	Digital filter control modes. More...

Driver version
#define	FSL_LLWU_DRIVER_VERSION (MAKE_VERSION(2, 0, 4))
	LLWU driver version. More...

Low-Leakage Wakeup Unit Control APIs
static void	LLWU_GetVersionId (LLWU_Type base, llwu_version_id_t versionId)
	Gets the LLWU version ID. More...

static void	LLWU_GetParam (LLWU_Type base, llwu_param_t param)
	Gets the LLWU parameter. More...

void	LLWU_SetExternalWakeupPinMode (LLWU_Type *base, uint32_t pinIndex, llwu_external_pin_mode_t pinMode)
	Sets the external input pin source mode. More...

bool	LLWU_GetExternalWakeupPinFlag (LLWU_Type *base, uint32_t pinIndex)
	Gets the external wakeup source flag. More...

void	LLWU_ClearExternalWakeupPinFlag (LLWU_Type *base, uint32_t pinIndex)
	Clears the external wakeup source flag. More...

static void	LLWU_EnableInternalModuleInterruptWakup (LLWU_Type *base, uint32_t moduleIndex, bool enable)
	Enables/disables the internal module source. More...

static bool	LLWU_GetInternalWakeupModuleFlag (LLWU_Type *base, uint32_t moduleIndex)
	Gets the external wakeup source flag. More...

static void	LLWU_EnableInternalModuleDmaRequestWakup (LLWU_Type *base, uint32_t moduleIndex, bool enable)
	Enables/disables the internal module DMA wakeup source. More...

void	LLWU_SetPinFilterMode (LLWU_Type *base, uint32_t filterIndex, llwu_external_pin_filter_mode_t filterMode)
	Sets the pin filter configuration. More...

bool	LLWU_GetPinFilterFlag (LLWU_Type *base, uint32_t filterIndex)
	Gets the pin filter configuration. More...

void	LLWU_ClearPinFilterFlag (LLWU_Type *base, uint32_t filterIndex)
	Clears the pin filter configuration. More...

#define	INTERNAL_WAKEUP_MODULE_FLAG_REG MF

Detailed Description

The MCUXpresso SDK provides a peripheral driver for the Low-Leakage Wakeup Unit (LLWU) module of MCUXpresso SDK devices. The LLWU module allows the user to select external pin sources and internal modules as a wake-up source from low-leakage power modes.

External wakeup pins configurations

Configures the external wakeup pins' working modes, gets, and clears the wake pin flags. External wakeup pins are accessed by the pinIndex, which is started from 1. Numbers of the external pins depend on the SoC configuration.

Internal wakeup modules configurations

Enables/disables the internal wakeup modules and gets the module flags. Internal modules are accessed by moduleIndex, which is started from 1. Numbers of external pins depend the on SoC configuration.

Digital pin filter for external wakeup pin configurations

Configures the digital pin filter of the external wakeup pins' working modes, gets, and clears the pin filter flags. Digital pin filters are accessed by the filterIndex, which is started from 1. Numbers of external pins depend on the SoC configuration.

Data Structure Documentation

struct llwu_version_id_t

Data Fields
uint16_t	feature
	A feature specification number. More...

uint8_t	minor
	The minor version number. More...

uint8_t	major
	The major version number. More...

Field Documentation

uint16_t llwu_version_id_t::feature

uint8_t llwu_version_id_t::minor

uint8_t llwu_version_id_t::major

struct llwu_param_t

Data Fields
uint8_t	filters
	A number of the pin filter. More...

uint8_t	dmas
	A number of the wakeup DMA. More...

uint8_t	modules
	A number of the wakeup module. More...

uint8_t	pins
	A number of the wake up pin. More...

Field Documentation

uint8_t llwu_param_t::filters

uint8_t llwu_param_t::dmas

uint8_t llwu_param_t::modules

uint8_t llwu_param_t::pins

struct llwu_external_pin_filter_mode_t

Data Fields
uint32_t	pinIndex
	A pin number.

llwu_pin_filter_mode_t	filterMode
	Filter mode.

Macro Definition Documentation

#define FSL_LLWU_DRIVER_VERSION (MAKE_VERSION(2, 0, 4))

Enumeration Type Documentation

enum llwu_external_pin_mode_t

Enumerator
kLLWU_ExternalPinDisable	Pin disabled as a wakeup input.
kLLWU_ExternalPinRisingEdge	Pin enabled with the rising edge detection.
kLLWU_ExternalPinFallingEdge	Pin enabled with the falling edge detection.
kLLWU_ExternalPinAnyEdge	Pin enabled with any change detection.

enum llwu_pin_filter_mode_t

Enumerator
kLLWU_PinFilterDisable	Filter disabled.
kLLWU_PinFilterRisingEdge	Filter positive edge detection.
kLLWU_PinFilterFallingEdge	Filter negative edge detection.
kLLWU_PinFilterAnyEdge	Filter any edge detection.

Function Documentation

static void LLWU_GetVersionId	(	LLWU_Type *	base,
		llwu_version_id_t *	versionId
	)

inlinestatic

This function gets the LLWU version ID, including the major version number, the minor version number, and the feature specification number.

Parameters

base	LLWU peripheral base address.
versionId	A pointer to the version ID structure.

static void LLWU_GetParam	(	LLWU_Type *	base,
		llwu_param_t *	param
	)

inlinestatic

This function gets the LLWU parameter, including a wakeup pin number, a module number, a DMA number, and a pin filter number.

Parameters

base	LLWU peripheral base address.
param	A pointer to the LLWU parameter structure.

void LLWU_SetExternalWakeupPinMode	(	LLWU_Type *	base,
		uint32_t	pinIndex,
		llwu_external_pin_mode_t	pinMode
	)

This function sets the external input pin source mode that is used as a wake up source.

Parameters

base	LLWU peripheral base address.
pinIndex	A pin index to be enabled as an external wakeup source starting from 1.
pinMode	A pin configuration mode defined in the llwu_external_pin_modes_t.

bool LLWU_GetExternalWakeupPinFlag	(	LLWU_Type *	base,
		uint32_t	pinIndex
	)

This function checks the external pin flag to detect whether the MCU is woken up by the specific pin.

Parameters

base	LLWU peripheral base address.
pinIndex	A pin index, which starts from 1.

Returns: True if the specific pin is a wakeup source.

void LLWU_ClearExternalWakeupPinFlag	(	LLWU_Type *	base,
		uint32_t	pinIndex
	)

This function clears the external wakeup source flag for a specific pin.

Parameters

base	LLWU peripheral base address.
pinIndex	A pin index, which starts from 1.

static void LLWU_EnableInternalModuleInterruptWakup	(	LLWU_Type *	base,
		uint32_t	moduleIndex,
		bool	enable
	)

inlinestatic

This function enables/disables the internal module source mode that is used as a wake up source.

Parameters

base	LLWU peripheral base address.
moduleIndex	A module index to be enabled as an internal wakeup source starting from 1.
enable	An enable or a disable setting

static bool LLWU_GetInternalWakeupModuleFlag	(	LLWU_Type *	base,
		uint32_t	moduleIndex
	)

inlinestatic

This function checks the external pin flag to detect whether the system is woken up by the specific pin.

Parameters

base	LLWU peripheral base address.
moduleIndex	A module index, which starts from 1.

Returns: True if the specific pin is a wake up source.

static void LLWU_EnableInternalModuleDmaRequestWakup	(	LLWU_Type *	base,
		uint32_t	moduleIndex,
		bool	enable
	)

inlinestatic

This function enables/disables the internal DMA that is used as a wake up source.

Parameters

base	LLWU peripheral base address.
moduleIndex	An internal module index which is used as a DMA request source, starting from 1.
enable	Enable or disable the DMA request source

void LLWU_SetPinFilterMode	(	LLWU_Type *	base,
		uint32_t	filterIndex,
		llwu_external_pin_filter_mode_t	filterMode
	)

This function sets the pin filter configuration.

Parameters

base	LLWU peripheral base address.
filterIndex	A pin filter index used to enable/disable the digital filter, starting from 1.
filterMode	A filter mode configuration

bool LLWU_GetPinFilterFlag	(	LLWU_Type *	base,
		uint32_t	filterIndex
	)

This function gets the pin filter flag.

Parameters

base	LLWU peripheral base address.
filterIndex	A pin filter index, which starts from 1.

Returns: True if the flag is a source of the existing low-leakage power mode.

void LLWU_ClearPinFilterFlag	(	LLWU_Type *	base,
		uint32_t	filterIndex
	)

This function clears the pin filter flag.

Parameters

base	LLWU peripheral base address.
filterIndex	A pin filter index to clear the flag, starting from 1.

Data Structures

Enumerations

Driver version

Low-Leakage Wakeup Unit Control APIs

Detailed Description

External wakeup pins configurations

Internal wakeup modules configurations

Digital pin filter for external wakeup pin configurations

Data Structure Documentation

Data Fields

Field Documentation

Data Fields

Field Documentation

Data Fields

Macro Definition Documentation

Enumeration Type Documentation

Function Documentation