TIMER - Timer/Counter

Description

Timer/Counter (TIMER) Peripheral API.

The timer module consists of three main parts:

  • General timer configuration and enable control.
  • Compare/capture control.
  • Dead time insertion control (may not be available for all timers).

Data Structures

struct TIMER_Init_TypeDef
TIMER initialization structure.
struct TIMER_InitCC_TypeDef
TIMER compare/capture initialization structure.
struct TIMER_InitDTI_TypeDef
TIMER Dead Time Insertion (DTI) initialization structure.

Functions

bool TIMER_Valid (const TIMER_TypeDef *ref)
Validate the TIMER register block pointer.
bool TIMER_SupportsDTI (const TIMER_TypeDef *ref)
Check whether the TIMER is valid and supports Dead Timer Insertion (DTI).
uint32_t TIMER_MaxCount (const TIMER_TypeDef *ref)
Get the Max count of the timer.
uint32_t TIMER_CaptureGet (TIMER_TypeDef *timer, unsigned int ch)
Get compare/capture value for the compare/capture channel.
uint32_t TIMER_CaptureBufGet (TIMER_TypeDef *timer, unsigned int ch)
Get the buffered compare/capture value for compare/capture channel.
void TIMER_CompareBufSet (TIMER_TypeDef *timer, unsigned int ch, uint32_t val)
Set the compare value buffer for the compare/capture channel when operating in compare or PWM mode.
void TIMER_CompareSet (TIMER_TypeDef *timer, unsigned int ch, uint32_t val)
Set the compare value for compare/capture channel when operating in compare or PWM mode.
uint32_t TIMER_CounterGet (TIMER_TypeDef *timer)
Get the TIMER counter value.
void TIMER_CounterSet (TIMER_TypeDef *timer, uint32_t val)
Set the TIMER counter value.
void TIMER_Enable (TIMER_TypeDef *timer, bool enable)
Start/stop TIMER.
void TIMER_Init (TIMER_TypeDef *timer, const TIMER_Init_TypeDef *init)
Initialize TIMER.
void TIMER_InitCC (TIMER_TypeDef *timer, unsigned int ch, const TIMER_InitCC_TypeDef *init)
Initialize the TIMER compare/capture channel.
void TIMER_InitDTI (TIMER_TypeDef *timer, const TIMER_InitDTI_TypeDef *init)
Initialize the TIMER DTI unit.
void TIMER_EnableDTI (TIMER_TypeDef *timer, bool enable)
Enable or disable DTI unit.
uint32_t TIMER_GetDTIFault (TIMER_TypeDef *timer)
Get DTI fault source flags status.
void TIMER_ClearDTIFault (TIMER_TypeDef *timer, uint32_t flags)
Clear DTI fault source flags.
void TIMER_IntClear (TIMER_TypeDef *timer, uint32_t flags)
Clear one or more pending TIMER interrupts.
void TIMER_IntDisable (TIMER_TypeDef *timer, uint32_t flags)
Disable one or more TIMER interrupts.
void TIMER_IntEnable (TIMER_TypeDef *timer, uint32_t flags)
Enable one or more TIMER interrupts.
uint32_t TIMER_IntGet (TIMER_TypeDef *timer)
Get pending TIMER interrupt flags.
uint32_t TIMER_IntGetEnabled (TIMER_TypeDef *timer)
Get enabled and pending TIMER interrupt flags.
void TIMER_IntSet (TIMER_TypeDef *timer, uint32_t flags)
Set one or more pending TIMER interrupts from SW.
void TIMER_Lock (TIMER_TypeDef *timer)
Lock some TIMER registers to protect them from being modified.
void TIMER_Reset (TIMER_TypeDef *timer)
Reset the TIMER to the same state that it was in after a hardware reset.
void TIMER_TopBufSet (TIMER_TypeDef *timer, uint32_t val)
Set the top value buffer for the timer.
uint32_t TIMER_TopGet (TIMER_TypeDef *timer)
Get the top value setting for the timer.
void TIMER_TopSet (TIMER_TypeDef *timer, uint32_t val)
Set the top value for timer.
void TIMER_Unlock (TIMER_TypeDef *timer)
Unlock TIMER to enable writing to locked registers again.

Macros

#define TIMER_INIT_DEFAULT
Default configuration for TIMER initialization structure.
#define TIMER_INITCC_DEFAULT
Default configuration for TIMER compare/capture initialization structure.
#define TIMER_INITDTI_DEFAULT
Default configuration for TIMER DTI initialization structure.

Typedefs

typedef uint8_t TIMER_PRSSEL_TypeDef
Peripheral Reflex System signal.

Enumerations

enum TIMER_CCMode_TypeDef {
timerCCModeOff = _TIMER_CC_CTRL_MODE_OFF,
timerCCModeCapture = _TIMER_CC_CTRL_MODE_INPUTCAPTURE,
timerCCModeCompare = _TIMER_CC_CTRL_MODE_OUTPUTCOMPARE,
timerCCModePWM = _TIMER_CC_CTRL_MODE_PWM
}
Timer compare/capture mode.
enum TIMER_ClkSel_TypeDef {
timerClkSelHFPerClk = _TIMER_CTRL_CLKSEL_PRESCHFPERCLK,
timerClkSelCC1 = _TIMER_CTRL_CLKSEL_CC1,
timerClkSelCascade = _TIMER_CTRL_CLKSEL_TIMEROUF
}
Clock select.
enum TIMER_Edge_TypeDef {
timerEdgeRising = _TIMER_CC_CTRL_ICEDGE_RISING,
timerEdgeFalling = _TIMER_CC_CTRL_ICEDGE_FALLING,
timerEdgeBoth = _TIMER_CC_CTRL_ICEDGE_BOTH,
timerEdgeNone = _TIMER_CC_CTRL_ICEDGE_NONE
}
Input capture edge select.
enum TIMER_Event_TypeDef {
timerEventEveryEdge = _TIMER_CC_CTRL_ICEVCTRL_EVERYEDGE,
timerEventEvery2ndEdge = _TIMER_CC_CTRL_ICEVCTRL_EVERYSECONDEDGE,
timerEventRising = _TIMER_CC_CTRL_ICEVCTRL_RISING,
timerEventFalling = _TIMER_CC_CTRL_ICEVCTRL_FALLING
}
Input capture event control.
enum TIMER_InputAction_TypeDef {
timerInputActionNone = _TIMER_CTRL_FALLA_NONE,
timerInputActionStart = _TIMER_CTRL_FALLA_START,
timerInputActionStop = _TIMER_CTRL_FALLA_STOP,
timerInputActionReloadStart = _TIMER_CTRL_FALLA_RELOADSTART
}
Input edge action.
enum TIMER_Mode_TypeDef {
timerModeUp = _TIMER_CTRL_MODE_UP,
timerModeDown = _TIMER_CTRL_MODE_DOWN,
timerModeUpDown = _TIMER_CTRL_MODE_UPDOWN,
timerModeQDec = _TIMER_CTRL_MODE_QDEC
}
Timer mode.
enum TIMER_OutputAction_TypeDef {
timerOutputActionNone = _TIMER_CC_CTRL_CUFOA_NONE,
timerOutputActionToggle = _TIMER_CC_CTRL_CUFOA_TOGGLE,
timerOutputActionClear = _TIMER_CC_CTRL_CUFOA_CLEAR,
timerOutputActionSet = _TIMER_CC_CTRL_CUFOA_SET
}
Compare/capture output action.
enum TIMER_Prescale_TypeDef {
timerPrescale1 = _TIMER_CTRL_PRESC_DIV1,
timerPrescale2 = _TIMER_CTRL_PRESC_DIV2,
timerPrescale4 = _TIMER_CTRL_PRESC_DIV4,
timerPrescale8 = _TIMER_CTRL_PRESC_DIV8,
timerPrescale16 = _TIMER_CTRL_PRESC_DIV16,
timerPrescale32 = _TIMER_CTRL_PRESC_DIV32,
timerPrescale64 = _TIMER_CTRL_PRESC_DIV64,
timerPrescale128 = _TIMER_CTRL_PRESC_DIV128,
timerPrescale256 = _TIMER_CTRL_PRESC_DIV256,
timerPrescale512 = _TIMER_CTRL_PRESC_DIV512,
timerPrescale1024 = _TIMER_CTRL_PRESC_DIV1024
}
Prescaler.
enum TIMER_DtiFaultAction_TypeDef {
timerDtiFaultActionNone = _TIMER_DTFC_DTFA_NONE,
timerDtiFaultActionInactive = _TIMER_DTFC_DTFA_INACTIVE,
timerDtiFaultActionClear = _TIMER_DTFC_DTFA_CLEAR,
timerDtiFaultActionTristate = _TIMER_DTFC_DTFA_TRISTATE
}
DT (Dead Time) Fault Actions.
enum TIMER_PrsOutput_t {
timerPrsOutputPulse = 0,
timerPrsOutputLevel = 1,
timerPrsOutputDefault = timerPrsOutputPulse
}
PRS Output configuration.

Function Documentation

TIMER_Valid()

bool TIMER_Valid ( const TIMER_TypeDef * ref )
inline

Validate the TIMER register block pointer.

Parameters
[in] ref Pointer to the TIMER peripheral register block.
Returns
True if ref points to a valid timer, false otherwise.

TIMER_SupportsDTI()

bool TIMER_SupportsDTI ( const TIMER_TypeDef * ref )
inline

Check whether the TIMER is valid and supports Dead Timer Insertion (DTI).

Parameters
[in] ref Pointer to the TIMER peripheral register block.
Returns
True if ref points to a valid timer that supports DTI, false otherwise.

TIMER_MaxCount()

uint32_t TIMER_MaxCount ( const TIMER_TypeDef * ref )
inline

Get the Max count of the timer.

Parameters
[in] ref Pointer to the TIMER peripheral register block.
Returns
The max count value of the timer. This is 0xFFFF for 16 bit timers and 0xFFFFFFFF for 32 bit timers.

TIMER_CaptureGet()

uint32_t TIMER_CaptureGet ( TIMER_TypeDef * timer,
unsigned int ch
)
inline

Get compare/capture value for the compare/capture channel.

Parameters
[in] timer Pointer to the TIMER peripheral register block.
[in] ch Compare/capture channel to access.
Returns
Current capture value.

TIMER_CaptureBufGet()

uint32_t TIMER_CaptureBufGet ( TIMER_TypeDef * timer,
unsigned int ch
)
inline

Get the buffered compare/capture value for compare/capture channel.

Parameters
[in] timer Pointer to the TIMER peripheral register block.
[in] ch Compare/capture channel to access.
Returns
Current buffered capture value.

TIMER_CompareBufSet()

void TIMER_CompareBufSet ( TIMER_TypeDef * timer,
unsigned int ch,
uint32_t val
)
inline

Set the compare value buffer for the compare/capture channel when operating in compare or PWM mode.

The compare value buffer holds the value which will be written to TIMERn_CCx_CCV on an update event if the buffer has been updated since the last event.

Parameters
[in] timer Pointer to the TIMER peripheral register block.
[in] ch Compare/capture channel to access.
[in] val Value to set in compare value buffer register.

TIMER_CompareSet()

void TIMER_CompareSet ( TIMER_TypeDef * timer,
unsigned int ch,
uint32_t val
)
inline

Set the compare value for compare/capture channel when operating in compare or PWM mode.

Parameters
[in] timer Pointer to the TIMER peripheral register block.
[in] ch Compare/capture channel to access.
[in] val Value to set in compare value register.

TIMER_CounterGet()

uint32_t TIMER_CounterGet ( TIMER_TypeDef * timer )
inline

Get the TIMER counter value.

Parameters
[in] timer Pointer to TIMER peripheral register block.
Returns
Current TIMER counter value.

TIMER_CounterSet()

void TIMER_CounterSet ( TIMER_TypeDef * timer,
uint32_t val
)
inline

Set the TIMER counter value.

Parameters
[in] timer Pointer to the TIMER peripheral register block.
[in] val Value to set counter to.

TIMER_Enable()

void TIMER_Enable ( TIMER_TypeDef * timer,
bool enable
)
inline

Start/stop TIMER.

Parameters
[in] timer Pointer to the TIMER peripheral register block.
[in] enable Set to true to enable counting; set to false otherwise.

TIMER_Init()

void TIMER_Init ( TIMER_TypeDef * timer,
const TIMER_Init_TypeDef * init
)

Initialize TIMER.

Notice that the counter top must be configured separately with, for instance TIMER_TopSet() . In addition, compare/capture and dead-time insertion initialization must be initialized separately if used, which should probably be done prior to using this function if configuring the TIMER to start when initialization is completed.

Parameters
[in] timer A pointer to the TIMER peripheral register block.
[in] init A pointer to the TIMER initialization structure.

TIMER_InitCC()

void TIMER_InitCC ( TIMER_TypeDef * timer,
unsigned int ch,
const TIMER_InitCC_TypeDef * init
)

Initialize the TIMER compare/capture channel.

Notice that if operating the channel in compare mode, the CCV and CCVB register must be set separately, as required.

Parameters
[in] timer A pointer to the TIMER peripheral register block.
[in] ch A compare/capture channel to initialize for.
[in] init A pointer to the TIMER initialization structure.

TIMER_InitDTI()

void TIMER_InitDTI ( TIMER_TypeDef * timer,
const TIMER_InitDTI_TypeDef * init
)

Initialize the TIMER DTI unit.

Parameters
[in] timer A pointer to the TIMER peripheral register block.
[in] init A pointer to the TIMER DTI initialization structure.

TIMER_EnableDTI()

void TIMER_EnableDTI ( TIMER_TypeDef * timer,
bool enable
)
inline

Enable or disable DTI unit.

Parameters
[in] timer Pointer to the TIMER peripheral register block.
[in] enable Set to true to enable DTI unit; set to false otherwise.

TIMER_GetDTIFault()

uint32_t TIMER_GetDTIFault ( TIMER_TypeDef * timer )
inline

Get DTI fault source flags status.

Note
Event bits are not cleared by this function.
Parameters
[in] timer Pointer to the TIMER peripheral register block.
Returns
Status of the DTI fault source flags. Returns one or more valid DTI fault source flags (TIMER_DTFAULT_nnn) OR'ed together.

TIMER_ClearDTIFault()

void TIMER_ClearDTIFault ( TIMER_TypeDef * timer,
uint32_t flags
)
inline

Clear DTI fault source flags.

Parameters
[in] timer Pointer to the TIMER peripheral register block.
[in] flags DTI fault source(s) to clear. Use one or more valid DTI fault source flags (TIMER_DTFAULT_nnn) OR'ed together.

TIMER_IntClear()

void TIMER_IntClear ( TIMER_TypeDef * timer,
uint32_t flags
)
inline

Clear one or more pending TIMER interrupts.

Parameters
[in] timer Pointer to the TIMER peripheral register block.
[in] flags Pending TIMER interrupt source(s) to clear. Use one or more valid interrupt flags for the TIMER module (TIMER_IF_nnn) OR'ed together.

TIMER_IntDisable()

void TIMER_IntDisable ( TIMER_TypeDef * timer,
uint32_t flags
)
inline

Disable one or more TIMER interrupts.

Parameters
[in] timer Pointer to the TIMER peripheral register block.
[in] flags TIMER interrupt source(s) to disable. Use one or more valid interrupt flags for the TIMER module (TIMER_IF_nnn) OR'ed together.

TIMER_IntEnable()

void TIMER_IntEnable ( TIMER_TypeDef * timer,
uint32_t flags
)
inline

Enable one or more TIMER interrupts.

Note
Depending on the use, a pending interrupt may already be set prior to enabling the interrupt. To ignore a pending interrupt, consider using TIMER_IntClear() prior to enabling the interrupt.
Parameters
[in] timer Pointer to the TIMER peripheral register block.
[in] flags TIMER interrupt source(s) to enable. Use one or more valid interrupt flags for the TIMER module (TIMER_IF_nnn) OR'ed together.

TIMER_IntGet()

uint32_t TIMER_IntGet ( TIMER_TypeDef * timer )
inline

Get pending TIMER interrupt flags.

Note
Event bits are not cleared by this function.
Parameters
[in] timer Pointer to the TIMER peripheral register block.
Returns
TIMER interrupt source(s) pending. Returns one or more valid interrupt flags for the TIMER module (TIMER_IF_nnn) OR'ed together.

TIMER_IntGetEnabled()

uint32_t TIMER_IntGetEnabled ( TIMER_TypeDef * timer )
inline

Get enabled and pending TIMER interrupt flags.

Useful for handling more interrupt sources in the same interrupt handler.

Parameters
[in] timer Pointer to the TIMER peripheral register block.
Note
Interrupt flags are not cleared by this function.
Returns
Pending and enabled TIMER interrupt sources. The return value is the bitwise AND combination of
  • the OR combination of enabled interrupt sources in TIMERx_IEN_nnn register (TIMERx_IEN_nnn) and
  • the OR combination of valid interrupt flags of the TIMER module (TIMERx_IF_nnn).

TIMER_IntSet()

void TIMER_IntSet ( TIMER_TypeDef * timer,
uint32_t flags
)
inline

Set one or more pending TIMER interrupts from SW.

Parameters
[in] timer Pointer to the TIMER peripheral register block.
[in] flags TIMER interrupt source(s) to set to pending. Use one or more valid interrupt flags for the TIMER module (TIMER_IF_nnn) OR'ed together.

TIMER_Lock()

void TIMER_Lock ( TIMER_TypeDef * timer )
inline

Lock some TIMER registers to protect them from being modified.

Refer to the reference manual for TIMER registers that will be locked.

Note
If locking the TIMER registers, they must be unlocked prior to using any TIMER API function that modifies TIMER registers protected by the lock.
Parameters
[in] timer Pointer to TIMER peripheral register block.

TIMER_Reset()

void TIMER_Reset ( TIMER_TypeDef * timer )

Reset the TIMER to the same state that it was in after a hardware reset.

Note
The ROUTE register is NOT reset by this function to allow for a centralized setup of this feature.
Parameters
[in] timer A pointer to the TIMER peripheral register block.

TIMER_TopBufSet()

void TIMER_TopBufSet ( TIMER_TypeDef * timer,
uint32_t val
)
inline

Set the top value buffer for the timer.

When top value buffer register is updated, value is loaded into top value register at the next wrap around. This feature is useful in order to update top value safely when timer is running.

Parameters
[in] timer Pointer to the TIMER peripheral register block.
[in] val Value to set in top value buffer register.

TIMER_TopGet()

uint32_t TIMER_TopGet ( TIMER_TypeDef * timer )
inline

Get the top value setting for the timer.

Parameters
[in] timer Pointer to the TIMER peripheral register block.
Returns
Current top value.

TIMER_TopSet()

void TIMER_TopSet ( TIMER_TypeDef * timer,
uint32_t val
)
inline

Set the top value for timer.

Parameters
[in] timer Pointer to the TIMER peripheral register block.
[in] val Value to set in top value register.

TIMER_Unlock()

void TIMER_Unlock ( TIMER_TypeDef * timer )
inline

Unlock TIMER to enable writing to locked registers again.

Parameters
[in] timer Pointer to the TIMER peripheral register block.

Macro Definition Documentation

TIMER_INIT_DEFAULT

#define TIMER_INIT_DEFAULT
Value:
{ \
true, /* Enable timer when initialization completes. */ \
false, /* Stop counter during debug halt. */ \
timerPrescale1, /* No prescaling. */ \
timerClkSelHFPerClk, /* Select HFPER / HFPERB clock. */ \
timerInputActionNone, /* No action on falling input edge. */ \
timerInputActionNone, /* No action on rising input edge. */ \
timerModeUp, /* Up-counting. */ \
false, /* Do not clear DMA requests when DMA channel is active. */ \
false, /* Select X2 quadrature decode mode (if used). */ \
false, /* Disable one shot. */ \
false /* Not started/stopped/reloaded by other timers. */ \
}

Default configuration for TIMER initialization structure.

TIMER_INITCC_DEFAULT

#define TIMER_INITCC_DEFAULT
Value:
{ \
timerEventEveryEdge, /* Event on every capture. */ \
timerEdgeRising, /* Input capture edge on rising edge. */ \
0, /* Not used by default, select PRS channel 0. */ \
timerOutputActionNone, /* No action on underflow. */ \
timerOutputActionNone, /* No action on overflow. */ \
timerOutputActionNone, /* No action on match. */ \
timerCCModeOff, /* Disable compare/capture channel. */ \
false, /* Disable filter. */ \
false, /* No PRS input. */ \
false, /* Clear output when counter disabled. */ \
false, /* Do not invert output. */ \
timerPrsOutputDefault, /* Use default PRS output configuration. */ \
}

Default configuration for TIMER compare/capture initialization structure.

TIMER_INITDTI_DEFAULT

#define TIMER_INITDTI_DEFAULT
Value:
{ \
true, /* Enable the DTI. */ \
false, /* CC[0|1|2] outputs are active high. */ \
false, /* CDTI[0|1|2] outputs are not inverted. */ \
false, /* No auto restart when debugger exits. */ \
false, /* No PRS source selected. */ \
0, /* Not used by default, select PRS channel 0. */ \
timerPrescale1, /* No prescaling. */ \
0, /* No rise time. */ \
0, /* No fall time. */ \
TIMER_DTOGEN_DTOGCC0EN | TIMER_DTOGEN_DTOGCDTI0EN, /* Enable CC0 and CDTI0. */ \
true, /* Enable core lockup as fault source. */ \
true, /* Enable debugger as fault source. */ \
false, /* Disable PRS fault source 0. */ \
0, /* Not used by default, select PRS channel 0. */ \
false, /* Disable PRS fault source 1. */ \
0, /* Not used by default, select PRS channel 0. */ \
timerDtiFaultActionInactive, /* No fault action. */ \
}

Default configuration for TIMER DTI initialization structure.

Typedef Documentation

TIMER_PRSSEL_TypeDef

typedef uint8_t TIMER_PRSSEL_TypeDef

Peripheral Reflex System signal.

Enumeration Type Documentation

TIMER_CCMode_TypeDef

Timer compare/capture mode.

Enumerator
timerCCModeOff

Channel turned off.

timerCCModeCapture

Input capture.

timerCCModeCompare

Output compare.

timerCCModePWM

Pulse-Width modulation.

TIMER_ClkSel_TypeDef

Clock select.

Enumerator
timerClkSelHFPerClk

Prescaled HFPER / HFPERB clock.

timerClkSelCC1

Compare/Capture Channel 1 Input.

timerClkSelCascade

Cascaded clocked by underflow or overflow by lower numbered timer.

TIMER_Edge_TypeDef

Input capture edge select.

Enumerator
timerEdgeRising

Rising edges detected.

timerEdgeFalling

Falling edges detected.

timerEdgeBoth

Both edges detected.

timerEdgeNone

No edge detection, leave signal as is.

TIMER_Event_TypeDef

Input capture event control.

Enumerator
timerEventEveryEdge

PRS output pulse, interrupt flag, and DMA request set on every capture.

timerEventEvery2ndEdge

PRS output pulse, interrupt flag, and DMA request set on every second capture.

timerEventRising

PRS output pulse, interrupt flag, and DMA request set on rising edge (if input capture edge = BOTH).

timerEventFalling

PRS output pulse, interrupt flag, and DMA request set on falling edge (if input capture edge = BOTH).

TIMER_InputAction_TypeDef

Input edge action.

Enumerator
timerInputActionNone

No action taken.

timerInputActionStart

Start counter without reload.

timerInputActionStop

Stop counter without reload.

timerInputActionReloadStart

Reload and start counter.

TIMER_Mode_TypeDef

Timer mode.

Enumerator
timerModeUp

Up-counting.

timerModeDown

Down-counting.

timerModeUpDown

Up/down-counting.

timerModeQDec

Quadrature decoder.

TIMER_OutputAction_TypeDef

Compare/capture output action.

Enumerator
timerOutputActionNone

No action.

timerOutputActionToggle

Toggle on event.

timerOutputActionClear

Clear on event.

timerOutputActionSet

Set on event.

TIMER_Prescale_TypeDef

Prescaler.

Enumerator
timerPrescale1

Divide by 1.

timerPrescale2

Divide by 2.

timerPrescale4

Divide by 4.

timerPrescale8

Divide by 8.

timerPrescale16

Divide by 16.

timerPrescale32

Divide by 32.

timerPrescale64

Divide by 64.

timerPrescale128

Divide by 128.

timerPrescale256

Divide by 256.

timerPrescale512

Divide by 512.

timerPrescale1024

Divide by 1024.

TIMER_DtiFaultAction_TypeDef

DT (Dead Time) Fault Actions.

Enumerator
timerDtiFaultActionNone

No action on fault.

timerDtiFaultActionInactive

Set outputs inactive.

timerDtiFaultActionClear

Clear outputs.

timerDtiFaultActionTristate

Tristate outputs.

TIMER_PrsOutput_t

PRS Output configuration.

Enumerator
timerPrsOutputPulse

Pulse PRS output from a channel.

timerPrsOutputLevel

PRS output follows CC out level.

timerPrsOutputDefault

Default PRS output behavior.