CMU - Clock Management Unit

Description

Clock management unit (CMU) Peripheral API.

This module contains functions for the CMU peripheral of Silicon Labs 32-bit MCUs and SoCs. The CMU module controls oscillators, clocks gates, clock multiplexers, pre-scalers, calibration modules and wait-states.

Data Structures

struct CMU_LFXOInit_TypeDef
LFXO initialization structure.
struct CMU_HFXOInit_TypeDef
HFXO initialization structure.
struct CMU_DPLLInit_TypeDef
DPLL initialization structure.

Functions

uint32_t CMU_Calibrate (uint32_t cycles, CMU_Select_TypeDef ref)
Calibrate an oscillator.
void CMU_CalibrateConfig (uint32_t downCycles, CMU_Select_TypeDef downSel, CMU_Select_TypeDef upSel)
Configure clock calibration.
uint32_t CMU_CalibrateCountGet (void)
Get calibration count value.
void CMU_ClkOutPinConfig (uint32_t clkNo, CMU_Select_TypeDef sel, CMU_ClkDiv_TypeDef clkDiv, GPIO_Port_TypeDef port, unsigned int pin)
Direct a clock to a GPIO pin.
CMU_ClkDiv_TypeDef CMU_ClockDivGet ( CMU_Clock_TypeDef clock)
Get clock divisor.
void CMU_ClockDivSet ( CMU_Clock_TypeDef clock, CMU_ClkDiv_TypeDef div)
Set clock divisor.
uint32_t CMU_ClockFreqGet ( CMU_Clock_TypeDef clock)
Get clock frequency for a clock point.
CMU_Select_TypeDef CMU_ClockSelectGet ( CMU_Clock_TypeDef clock)
Get currently selected reference clock used for a clock branch.
void CMU_ClockSelectSet ( CMU_Clock_TypeDef clock, CMU_Select_TypeDef ref)
Select reference clock/oscillator used for a clock branch.
uint16_t CMU_LF_ClockPrecisionGet ( CMU_Clock_TypeDef clock)
Gets the precision (in PPM) of the specified low frequency clock branch.
CMU_HFRCODPLLFreq_TypeDef CMU_HFRCODPLLBandGet (void)
Get HFRCODPLL band in use.
void CMU_HFRCODPLLBandSet ( CMU_HFRCODPLLFreq_TypeDef freq)
Set HFRCODPLL band and the tuning value based on the value in the calibration table made during production.
bool CMU_DPLLLock (const CMU_DPLLInit_TypeDef *init)
Lock the DPLL to a given frequency.
void CMU_HFXOInit (const CMU_HFXOInit_TypeDef *hfxoInit)
Initialize all HFXO control registers.
void CMU_HFXOCTuneSet (uint32_t ctune)
Set the HFXO crystal tuning capacitance.
uint32_t CMU_HFXOCTuneGet (void)
Get the HFXO crystal tuning capacitance.
void CMU_HFXOCTuneDeltaSet (int32_t delta)
Set the HFXO crystal tuning delta.
int32_t CMU_HFXOCTuneDeltaGet (void)
Get the HFXO crystal tuning delta.
void CMU_LFXOInit (const CMU_LFXOInit_TypeDef *lfxoInit)
Initialize LFXO control registers.
void CMU_LFXOPrecisionSet (uint16_t precision)
Sets LFXO's crystal precision, in PPM.
uint32_t CMU_OscillatorTuningGet ( CMU_Osc_TypeDef osc)
Get oscillator frequency tuning setting.
void CMU_OscillatorTuningSet ( CMU_Osc_TypeDef osc, uint32_t val)
Set the oscillator frequency tuning control.
void CMU_UpdateWaitStates (uint32_t freq, int vscale)
Configure wait state settings necessary to switch to a given core clock frequency at a certain voltage scale level.
void CMU_PCNTClockExternalSet (unsigned int instance, bool external)
Select the PCNTn clock.
CMU_HFRCOEM23Freq_TypeDef CMU_HFRCOEM23BandGet (void)
Get HFRCOEM23 band in use.
void CMU_HFRCOEM23BandSet ( CMU_HFRCOEM23Freq_TypeDef freq)
Set HFRCOEM23 band and the tuning value based on the value in the calibration table made during production.
void CMU_ClockEnable ( CMU_Clock_TypeDef clock, bool enable)
Enable/disable a clock.
void CMU_CalibrateCont (bool enable)
Configure continuous calibration mode.
void CMU_CalibrateStart (void)
Start calibration.
void CMU_CalibrateStop (void)
Stop calibration counters.
void CMU_DPLLUnlock (void)
Unlock the DPLL.
void CMU_IntClear (uint32_t flags)
Clear one or more pending CMU interrupt flags.
void CMU_IntDisable (uint32_t flags)
Disable one or more CMU interrupt sources.
void CMU_IntEnable (uint32_t flags)
Enable one or more CMU interrupt sources.
uint32_t CMU_IntGet (void)
Get pending CMU interrupt sources.
uint32_t CMU_IntGetEnabled (void)
Get enabled and pending CMU interrupt flags.
void CMU_IntSet (uint32_t flags)
Set one or more pending CMU interrupt sources.
void CMU_Lock (void)
Lock CMU register access in order to protect registers contents against unintended modification.
void CMU_OscillatorEnable ( CMU_Osc_TypeDef osc, bool enable, bool wait)
Enable/disable oscillator.
void CMU_Unlock (void)
Unlock CMU register access so that writing to registers is possible.
void CMU_WdogLock (void)
Lock WDOG register access in order to protect registers contents against unintended modification.
void CMU_WdogUnlock (void)
Unlock WDOG register access so that writing to registers is possible.
uint32_t CMU_PrescToLog2 (uint32_t presc)
Convert prescaler divider to a logarithmic value.

Macros

#define CMU_CLOCK_SELECT_SET (clock, sel)   CMU_##clock##_SELECT_##sel
Macro to set clock sources in the clock tree.
#define CMU_HFRCODPLL_MIN cmuHFRCODPLLFreq_1M0Hz
HFRCODPLL maximum frequency.
#define CMU_HFRCODPLL_MAX cmuHFRCODPLLFreq_80M0Hz
HFRCODPLL minimum frequency.
#define CMU_HFRCOEM23_MIN cmuHFRCOEM23Freq_1M0Hz
HFRCOEM23 maximum frequency.
#define CMU_HFRCOEM23_MAX cmuHFRCOEM23Freq_40M0Hz
HFRCOEM23 minimum frequency.
#define CMU_LFXOINIT_DEFAULT
Default LFXO initialization values for XTAL mode.
#define CMU_LFXOINIT_EXTERNAL_CLOCK
Default LFXO initialization values for external clock mode.
#define CMU_LFXOINIT_EXTERNAL_SINE
Default LFXO initialization values for external sine mode.
#define CMU_HFXOINIT_DEFAULT
Default HFXO initialization values for XTAL mode.
#define CMU_HFXOINIT_EXTERNAL_SINE
Default HFXO initialization values for external sine mode.
#define CMU_HFXOINIT_EXTERNAL_SINEPKDET
Default HFXO initialization values for external sine mode with peak detector.
#define CMU_DPLL_LFXO_TO_40MHZ
DPLL initialization values for 39,998,805 Hz using LFXO as reference clock, M=2 and N=3661.
#define CMU_DPLL_HFXO_TO_76_8MHZ
DPLL initialization values for 76,800,000 Hz using HFXO as reference clock, M = 1919, N = 3839.
#define CMU_DPLL_HFXO_TO_80MHZ
DPLL initialization values for 80,000,000 Hz using HFXO as reference clock, M = 1919, N = 3999.
#define CMU_DPLLINIT_DEFAULT
Default configurations for DPLL initialization.

Typedefs

typedef uint32_t CMU_ClkDiv_TypeDef
Clock divider configuration.

Enumerations

enum CMU_HFRCODPLLFreq_TypeDef {
cmuHFRCODPLLFreq_1M0Hz = 1000000U,
cmuHFRCODPLLFreq_2M0Hz = 2000000U,
cmuHFRCODPLLFreq_4M0Hz = 4000000U,
cmuHFRCODPLLFreq_7M0Hz = 7000000U,
cmuHFRCODPLLFreq_13M0Hz = 13000000U,
cmuHFRCODPLLFreq_16M0Hz = 16000000U,
cmuHFRCODPLLFreq_19M0Hz = 19000000U,
cmuHFRCODPLLFreq_26M0Hz = 26000000U,
cmuHFRCODPLLFreq_32M0Hz = 32000000U,
cmuHFRCODPLLFreq_38M0Hz = 38000000U,
cmuHFRCODPLLFreq_48M0Hz = 48000000U,
cmuHFRCODPLLFreq_56M0Hz = 56000000U,
cmuHFRCODPLLFreq_64M0Hz = 64000000U,
cmuHFRCODPLLFreq_80M0Hz = 80000000U,
cmuHFRCODPLLFreq_UserDefined = 0
}
HFRCODPLL frequency bands.
enum CMU_HFRCOEM23Freq_TypeDef {
cmuHFRCOEM23Freq_1M0Hz = 1000000U,
cmuHFRCOEM23Freq_2M0Hz = 2000000U,
cmuHFRCOEM23Freq_4M0Hz = 4000000U,
cmuHFRCOEM23Freq_13M0Hz = 13000000U,
cmuHFRCOEM23Freq_16M0Hz = 16000000U,
cmuHFRCOEM23Freq_19M0Hz = 19000000U,
cmuHFRCOEM23Freq_26M0Hz = 26000000U,
cmuHFRCOEM23Freq_32M0Hz = 32000000U,
cmuHFRCOEM23Freq_40M0Hz = 40000000U,
cmuHFRCOEM23Freq_UserDefined = 0
}
HFRCOEM23 frequency bands.
enum CMU_Clock_TypeDef {
cmuClock_SYSCLK ,
cmuClock_HCLK ,
cmuClock_EXPCLK ,
cmuClock_PCLK ,
cmuClock_LSPCLK ,
cmuClock_IADCCLK ,
cmuClock_EM01GRPACLK ,
cmuClock_EM23GRPACLK ,
cmuClock_EM4GRPACLK ,
cmuClock_WDOG0CLK ,
cmuClock_WDOG1CLK ,
cmuClock_DPLLREFCLK ,
cmuClock_TRACECLK ,
cmuClock_RTCCCLK ,
cmuClock_HFRCOEM23 ,
cmuClock_CORE ,
cmuClock_SYSTICK ,
cmuClock_ACMP0 ,
cmuClock_ACMP1 ,
cmuClock_BURTC ,
cmuClock_GPCRC ,
cmuClock_GPIO ,
cmuClock_I2C0 ,
cmuClock_I2C1 ,
cmuClock_IADC0 ,
cmuClock_LDMA ,
cmuClock_LETIMER0 ,
cmuClock_PRS ,
cmuClock_RTCC ,
cmuClock_TIMER0 ,
cmuClock_TIMER1 ,
cmuClock_TIMER2 ,
cmuClock_TIMER3 ,
cmuClock_USART0 ,
cmuClock_USART1 ,
cmuClock_USART2 ,
cmuClock_WDOG0 ,
cmuClock_WDOG1 ,
cmuClock_PDM
}
Clock points in CMU clock-tree.
enum CMU_Osc_TypeDef {
cmuOsc_LFXO ,
cmuOsc_LFRCO ,
cmuOsc_FSRCO ,
cmuOsc_HFXO ,
cmuOsc_HFRCODPLL ,
cmuOsc_HFRCOEM23 ,
cmuOsc_ULFRCO
}
Clock points in CMU clock-tree.
enum CMU_Select_TypeDef {
cmuSelect_Error ,
cmuSelect_Disabled ,
cmuSelect_FSRCO ,
cmuSelect_HFXO ,
cmuSelect_HFRCODPLL ,
cmuSelect_HFRCOEM23 ,
cmuSelect_CLKIN0 ,
cmuSelect_LFXO ,
cmuSelect_LFRCO ,
cmuSelect_ULFRCO ,
cmuSelect_PCLK ,
cmuSelect_HCLK ,
cmuSelect_HCLKDIV1024 ,
cmuSelect_EM01GRPACLK ,
cmuSelect_EM23GRPACLK ,
cmuSelect_EXPCLK ,
cmuSelect_PRS
}
Selectable clock sources.
enum CMU_DPLLEdgeSel_TypeDef {
cmuDPLLEdgeSel_Fall = 0,
cmuDPLLEdgeSel_Rise = 1
}
DPLL reference clock edge detect selector.
enum CMU_DPLLLockMode_TypeDef {
cmuDPLLLockMode_Freq = _DPLL_CFG_MODE_FLL,
cmuDPLLLockMode_Phase = _DPLL_CFG_MODE_PLL
}
DPLL lock mode selector.
enum CMU_LfxoOscMode_TypeDef {
cmuLfxoOscMode_Crystal = _LFXO_CFG_MODE_XTAL,
cmuLfxoOscMode_AcCoupledSine = _LFXO_CFG_MODE_BUFEXTCLK,
cmuLfxoOscMode_External = _LFXO_CFG_MODE_DIGEXTCLK
}
LFXO oscillator modes.
enum CMU_LfxoStartupDelay_TypeDef {
cmuLfxoStartupDelay_2Cycles = _LFXO_CFG_TIMEOUT_CYCLES2,
cmuLfxoStartupDelay_256Cycles = _LFXO_CFG_TIMEOUT_CYCLES256,
cmuLfxoStartupDelay_1KCycles = _LFXO_CFG_TIMEOUT_CYCLES1K,
cmuLfxoStartupDelay_2KCycles = _LFXO_CFG_TIMEOUT_CYCLES2K,
cmuLfxoStartupDelay_4KCycles = _LFXO_CFG_TIMEOUT_CYCLES4K,
cmuLfxoStartupDelay_8KCycles = _LFXO_CFG_TIMEOUT_CYCLES8K,
cmuLfxoStartupDelay_16KCycles = _LFXO_CFG_TIMEOUT_CYCLES16K,
cmuLfxoStartupDelay_32KCycles = _LFXO_CFG_TIMEOUT_CYCLES32K
}
LFXO start-up timeout delay.
enum CMU_HfxoOscMode_TypeDef {
cmuHfxoOscMode_Crystal = _HFXO_CFG_MODE_XTAL,
cmuHfxoOscMode_ExternalSine = _HFXO_CFG_MODE_EXTCLK
}
HFXO oscillator modes.
enum CMU_HfxoCbLsbTimeout_TypeDef {
cmuHfxoCbLsbTimeout_8us = _HFXO_XTALCFG_TIMEOUTCBLSB_T8US,
cmuHfxoCbLsbTimeout_20us = _HFXO_XTALCFG_TIMEOUTCBLSB_T20US,
cmuHfxoCbLsbTimeout_41us = _HFXO_XTALCFG_TIMEOUTCBLSB_T41US,
cmuHfxoCbLsbTimeout_62us = _HFXO_XTALCFG_TIMEOUTCBLSB_T62US,
cmuHfxoCbLsbTimeout_83us = _HFXO_XTALCFG_TIMEOUTCBLSB_T83US,
cmuHfxoCbLsbTimeout_104us = _HFXO_XTALCFG_TIMEOUTCBLSB_T104US,
cmuHfxoCbLsbTimeout_125us = _HFXO_XTALCFG_TIMEOUTCBLSB_T125US,
cmuHfxoCbLsbTimeout_166us = _HFXO_XTALCFG_TIMEOUTCBLSB_T166US,
cmuHfxoCbLsbTimeout_208us = _HFXO_XTALCFG_TIMEOUTCBLSB_T208US,
cmuHfxoCbLsbTimeout_250us = _HFXO_XTALCFG_TIMEOUTCBLSB_T250US,
cmuHfxoCbLsbTimeout_333us = _HFXO_XTALCFG_TIMEOUTCBLSB_T333US,
cmuHfxoCbLsbTimeout_416us = _HFXO_XTALCFG_TIMEOUTCBLSB_T416US,
cmuHfxoCbLsbTimeout_833us = _HFXO_XTALCFG_TIMEOUTCBLSB_T833US,
cmuHfxoCbLsbTimeout_1250us = _HFXO_XTALCFG_TIMEOUTCBLSB_T1250US,
cmuHfxoCbLsbTimeout_2083us = _HFXO_XTALCFG_TIMEOUTCBLSB_T2083US,
cmuHfxoCbLsbTimeout_3750us = _HFXO_XTALCFG_TIMEOUTCBLSB_T3750US
}
HFXO core bias LSB change timeout.
enum CMU_HfxoSteadyStateTimeout_TypeDef {
cmuHfxoSteadyStateTimeout_16us = _HFXO_XTALCFG_TIMEOUTSTEADY_T16US,
cmuHfxoSteadyStateTimeout_41us = _HFXO_XTALCFG_TIMEOUTSTEADY_T41US,
cmuHfxoSteadyStateTimeout_83us = _HFXO_XTALCFG_TIMEOUTSTEADY_T83US,
cmuHfxoSteadyStateTimeout_125us = _HFXO_XTALCFG_TIMEOUTSTEADY_T125US,
cmuHfxoSteadyStateTimeout_166us = _HFXO_XTALCFG_TIMEOUTSTEADY_T166US,
cmuHfxoSteadyStateTimeout_208us = _HFXO_XTALCFG_TIMEOUTSTEADY_T208US,
cmuHfxoSteadyStateTimeout_250us = _HFXO_XTALCFG_TIMEOUTSTEADY_T250US,
cmuHfxoSteadyStateTimeout_333us = _HFXO_XTALCFG_TIMEOUTSTEADY_T333US,
cmuHfxoSteadyStateTimeout_416us = _HFXO_XTALCFG_TIMEOUTSTEADY_T416US,
cmuHfxoSteadyStateTimeout_500us = _HFXO_XTALCFG_TIMEOUTSTEADY_T500US,
cmuHfxoSteadyStateTimeout_666us = _HFXO_XTALCFG_TIMEOUTSTEADY_T666US,
cmuHfxoSteadyStateTimeout_833us = _HFXO_XTALCFG_TIMEOUTSTEADY_T833US,
cmuHfxoSteadyStateTimeout_1666us = _HFXO_XTALCFG_TIMEOUTSTEADY_T1666US,
cmuHfxoSteadyStateTimeout_2500us = _HFXO_XTALCFG_TIMEOUTSTEADY_T2500US,
cmuHfxoSteadyStateTimeout_4166us = _HFXO_XTALCFG_TIMEOUTSTEADY_T4166US,
cmuHfxoSteadyStateTimeout_7500us = _HFXO_XTALCFG_TIMEOUTSTEADY_T7500US
}
HFXO steady state timeout.
enum CMU_HfxoCoreDegen_TypeDef {
cmuHfxoCoreDegen_None = _HFXO_XTALCTRL_COREDGENANA_NONE,
cmuHfxoCoreDegen_33 = _HFXO_XTALCTRL_COREDGENANA_DGEN33,
cmuHfxoCoreDegen_50 = _HFXO_XTALCTRL_COREDGENANA_DGEN50,
cmuHfxoCoreDegen_100 = _HFXO_XTALCTRL_COREDGENANA_DGEN100
}
HFXO core degeneration control.
enum CMU_HfxoCtuneFixCap_TypeDef {
cmuHfxoCtuneFixCap_None = _HFXO_XTALCTRL_CTUNEFIXANA_NONE,
cmuHfxoCtuneFixCap_Xi = _HFXO_XTALCTRL_CTUNEFIXANA_XI,
cmuHfxoCtuneFixCap_Xo = _HFXO_XTALCTRL_CTUNEFIXANA_XO,
cmuHfxoCtuneFixCap_Both = _HFXO_XTALCTRL_CTUNEFIXANA_BOTH
}
HFXO XI and XO pin fixed capacitor control.
enum CMU_Precision_TypeDef {
cmuPrecisionDefault ,
cmuPrecisionHigh
}
Oscillator precision modes.

Function Documentation

◆ CMU_Calibrate()

uint32_t CMU_Calibrate ( uint32_t cycles,
CMU_Select_TypeDef ref
)

Calibrate an oscillator.

Run a calibration of a selectable reference clock againt HCLK. Please refer to the reference manual, CMU chapter, for further details.

Note
This function will not return until calibration measurement is completed.
Parameters
[in] cycles The number of HCLK cycles to run calibration. Increasing this number increases precision, but the calibration will take more time.
[in] ref The reference clock used to compare against HCLK.
Returns
The number of ticks the selected reference clock ticked while running cycles ticks of the HCLK clock.

◆ CMU_CalibrateConfig()

void CMU_CalibrateConfig ( uint32_t downCycles,
CMU_Select_TypeDef downSel,
CMU_Select_TypeDef upSel
)

Configure clock calibration.

Configure a calibration for a selectable clock source against another selectable reference clock. Refer to the reference manual, CMU chapter, for further details.

Note
After configuration, a call to CMU_CalibrateStart() is required, and the resulting calibration value can be read with the CMU_CalibrateCountGet() function call.
Parameters
[in] downCycles The number of downSel clock cycles to run calibration. Increasing this number increases precision, but the calibration will take more time.
[in] downSel The clock which will be counted down downCycles cycles.
[in] upSel The reference clock, the number of cycles generated by this clock will be counted and added up, the result can be given with the CMU_CalibrateCountGet() function call.

◆ CMU_CalibrateCountGet()

uint32_t CMU_CalibrateCountGet ( void )

Get calibration count value.

Note
If continuous calibration mode is active, calibration busy will almost always be off, and reading the value will be just needed, where the normal case would be that this function call has been triggered by the CALRDY interrupt flag.
Returns
Calibration count, the number of UPSEL clocks (see CMU_CalibrateConfig() ) in the period of DOWNSEL oscillator clock cycles configured by a previous write operation to CMU->CALCNT.

◆ CMU_ClkOutPinConfig()

void CMU_ClkOutPinConfig ( uint32_t clkNo,
CMU_Select_TypeDef sel,
CMU_ClkDiv_TypeDef clkDiv,
GPIO_Port_TypeDef port,
unsigned int pin
)

Direct a clock to a GPIO pin.

Parameters
[in] clkNo Selects between CLKOUT0, CLKOUT1 or CLKOUT2 outputs. Use values 0,1or 2.
[in] sel Select clock source.
[in] clkDiv Select a clock divisor (1..32). Only applicable when cmuSelect_EXPCLK is slexted as clock source.
[in] port GPIO port.
[in] pin GPIO pin.
Note
Refer to the reference manual and the datasheet for details on which GPIO port/pins that are available.

◆ CMU_ClockDivGet()

CMU_ClkDiv_TypeDef CMU_ClockDivGet ( CMU_Clock_TypeDef clock )

Get clock divisor.

Parameters
[in] clock Clock point to get divisor for. Notice that not all clock points have a divisors. Please refer to CMU overview in reference manual.
Returns
The current clock point divisor. 1 is returned if clock specifies a clock point without divisor.

◆ CMU_ClockDivSet()

void CMU_ClockDivSet ( CMU_Clock_TypeDef clock,
CMU_ClkDiv_TypeDef div
)

Set clock divisor.

Parameters
[in] clock Clock point to set divisor for. Notice that not all clock points have a divisor, please refer to CMU overview in the reference manual.
[in] div The clock divisor to use.

◆ CMU_ClockFreqGet()

uint32_t CMU_ClockFreqGet ( CMU_Clock_TypeDef clock )

Get clock frequency for a clock point.

Parameters
[in] clock Clock point to fetch frequency for.
Returns
The current frequency in Hz.

◆ CMU_ClockSelectGet()

CMU_Select_TypeDef CMU_ClockSelectGet ( CMU_Clock_TypeDef clock )

Get currently selected reference clock used for a clock branch.

Parameters
[in] clock Clock branch to fetch selected ref. clock for.
Returns
Reference clock used for clocking selected branch, cmuSelect_Error if invalid clock provided.

◆ CMU_ClockSelectSet()

void CMU_ClockSelectSet ( CMU_Clock_TypeDef clock,
CMU_Select_TypeDef ref
)

Select reference clock/oscillator used for a clock branch.

Parameters
[in] clock Clock branch to select reference clock for.
[in] ref Reference selected for clocking, please refer to reference manual for for details on which reference is available for a specific clock branch.

◆ CMU_LF_ClockPrecisionGet()

uint16_t CMU_LF_ClockPrecisionGet ( CMU_Clock_TypeDef clock )

Gets the precision (in PPM) of the specified low frequency clock branch.

Parameters
[in] clock Clock branch.
Returns
Precision, in PPM, of the specified clock branch.
Note
This function is only for internal usage.
The current implementation of this function is used to determine if the clock has a precision <= 500 ppm or not (which is the minimum required for BLE). Future version of this function should provide more accurate precision numbers to allow for further optimizations from the stacks.

◆ CMU_HFRCODPLLBandGet()

CMU_HFRCODPLLFreq_TypeDef CMU_HFRCODPLLBandGet ( void )

Get HFRCODPLL band in use.

Returns
HFRCODPLL band in use.

◆ CMU_HFRCODPLLBandSet()

void CMU_HFRCODPLLBandSet ( CMU_HFRCODPLLFreq_TypeDef freq )

Set HFRCODPLL band and the tuning value based on the value in the calibration table made during production.

Parameters
[in] freq HFRCODPLL frequency band to activate.

◆ CMU_DPLLLock()

bool CMU_DPLLLock ( const CMU_DPLLInit_TypeDef * init )

Lock the DPLL to a given frequency.

The frequency is given by: Fout = Fref * (N+1) / (M+1).

Note
This function does not check if the given N & M values will actually produce the desired target frequency.
N & M limitations:
300 < N <= 4095
0 <= M <= 4095
Any peripheral running off HFRCODPLL should be switched to a lower frequency clock (if possible) prior to calling this function to avoid over-clocking.
Parameters
[in] init DPLL setup parameter struct.
Returns
Returns false on invalid target frequency or DPLL locking error.

◆ CMU_HFXOInit()

void CMU_HFXOInit ( const CMU_HFXOInit_TypeDef * hfxoInit )

Initialize all HFXO control registers.

Note
HFXO configuration should be obtained from a configuration tool, app note or crystal datasheet. This function returns early if HFXO is already selected as SYSCLK.
Parameters
[in] hfxoInit HFXO setup parameters.

◆ CMU_HFXOCTuneSet()

void CMU_HFXOCTuneSet ( uint32_t ctune )

Set the HFXO crystal tuning capacitance.

Parameters
[in] ctune The desired tuning capacitance value. Each step corresponds to approximately 80fF. Min value is 0. Max value is 255.
Note
While the oscillator is running in steady operation state, it may be desirable to modify the tuning capacitance via CTUNEXIANA and CTUNEXOANA fields in the HFXO_XTALCTRL register. When tuning, care should be taken to make small changes to the CTUNE registers. Ideally, change the CTUNE registers by one LSB at a time and alternate between the XI and XO registers. Sufficient wait time for settling, on the order of TIMEOUTSTEADY, should pass before new frequency measurement is taken.

◆ CMU_HFXOCTuneGet()

uint32_t CMU_HFXOCTuneGet ( void )

Get the HFXO crystal tuning capacitance.

Returns
The HFXO crystal tuning capacitance.
Note
This function only returns the CTUNE XI value. The XO value can be different and can be found using the delta (difference between XI and XO). See CMU_HFXOCTuneDeltaGet to retrieve the delta value.

◆ CMU_HFXOCTuneDeltaSet()

void CMU_HFXOCTuneDeltaSet ( int32_t delta )

Set the HFXO crystal tuning delta.

Parameters
[in] delta Chip dependent crystal capacitor bank delta between HFXO XI and XO.
Note
The delta between XI and XO is applicable for the series 2 EFR32xG2x devices only.

◆ CMU_HFXOCTuneDeltaGet()

int32_t CMU_HFXOCTuneDeltaGet ( void )

Get the HFXO crystal tuning delta.

Returns
Chip dependent crystal capacitor bank tuning delta.

◆ CMU_LFXOInit()

void CMU_LFXOInit ( const CMU_LFXOInit_TypeDef * lfxoInit )

Initialize LFXO control registers.

Note
LFXO configuration should be obtained from a configuration tool, app note or crystal datasheet. This function disables the LFXO to ensure a valid state before update.
Parameters
[in] lfxoInit LFXO setup parameters

◆ CMU_LFXOPrecisionSet()

void CMU_LFXOPrecisionSet ( uint16_t precision )

Sets LFXO's crystal precision, in PPM.

Note
LFXO precision should be obtained from a crystal datasheet.
Parameters
[in] precision LFXO's crystal precision, in PPM.

◆ CMU_OscillatorTuningGet()

uint32_t CMU_OscillatorTuningGet ( CMU_Osc_TypeDef osc )

Get oscillator frequency tuning setting.

Parameters
[in] osc Oscillator to get tuning value for.
Returns
The oscillator frequency tuning setting in use.

◆ CMU_OscillatorTuningSet()

void CMU_OscillatorTuningSet ( CMU_Osc_TypeDef osc,
uint32_t val
)

Set the oscillator frequency tuning control.

Note
Oscillator tuning is done during production, and the tuning value is automatically loaded after a reset. Changing the tuning value from the calibrated value is for more advanced use. Certain oscillators also have build-in tuning optimization.
Parameters
[in] osc Oscillator to set tuning value for.
[in] val The oscillator frequency tuning setting to use.

◆ CMU_UpdateWaitStates()

void CMU_UpdateWaitStates ( uint32_t freq,
int vscale
)

Configure wait state settings necessary to switch to a given core clock frequency at a certain voltage scale level.

This function will set up the necessary flash wait states. Updating the wait state configuration must be done before increasing the clock frequency and it must be done after decreasing the clock frequency. Updating the wait state configuration must be done before core voltage is decreased and it must be done after a core voltage is increased.

Parameters
[in] freq The core clock frequency to configure wait-states.
[in] vscale The voltage scale to configure wait-states. Expected values are 0 or 1, higher number is lower voltage.
  • 0 = 1.1 V (VSCALE2)
  • 1 = 1.0 V (VSCALE1)

◆ CMU_PCNTClockExternalSet()

void CMU_PCNTClockExternalSet ( unsigned int instance,
bool external
)

Select the PCNTn clock.

Parameters
[in] instance PCNT instance number to set selected clock source for.
[in] external Set to true to select the external clock, false to select EM23GRPACLK.

◆ CMU_HFRCOEM23BandGet()

CMU_HFRCOEM23Freq_TypeDef CMU_HFRCOEM23BandGet ( void )

Get HFRCOEM23 band in use.

Returns
HFRCOEM23 band in use.

◆ CMU_HFRCOEM23BandSet()

void CMU_HFRCOEM23BandSet ( CMU_HFRCOEM23Freq_TypeDef freq )

Set HFRCOEM23 band and the tuning value based on the value in the calibration table made during production.

Parameters
[in] freq HFRCOEM23 frequency band to activate.

◆ CMU_ClockEnable()

void CMU_ClockEnable ( CMU_Clock_TypeDef clock,
bool enable
)
inline

Enable/disable a clock.

Note
This is a dummy function to solve backward compatibility issues.
Parameters
[in] clock The clock to enable/disable.
[in] enable
  • true - enable specified clock.
  • false - disable specified clock.

◆ CMU_CalibrateCont()

void CMU_CalibrateCont ( bool enable )
inline

Configure continuous calibration mode.

Parameters
[in] enable If true, enables continuous calibration, if false disables continuous calibration.

◆ CMU_CalibrateStart()

void CMU_CalibrateStart ( void )
inline

Start calibration.

Note
This call is usually invoked after CMU_CalibrateConfig() and possibly CMU_CalibrateCont() .

◆ CMU_CalibrateStop()

void CMU_CalibrateStop ( void )
inline

Stop calibration counters.

◆ CMU_DPLLUnlock()

void CMU_DPLLUnlock ( void )
inline

Unlock the DPLL.

Note
The HFRCODPLL oscillator is not turned off.

◆ CMU_IntClear()

void CMU_IntClear ( uint32_t flags )
inline

Clear one or more pending CMU interrupt flags.

Parameters
[in] flags CMU interrupt sources to clear.

◆ CMU_IntDisable()

void CMU_IntDisable ( uint32_t flags )
inline

Disable one or more CMU interrupt sources.

Parameters
[in] flags CMU interrupt sources to disable.

◆ CMU_IntEnable()

void CMU_IntEnable ( uint32_t flags )
inline

Enable one or more CMU interrupt sources.

Note
Depending on the use, a pending interrupt may already be set prior to enabling the interrupt. Consider using CMU_IntClear() prior to enabling if such a pending interrupt should be ignored.
Parameters
[in] flags CMU interrupt sources to enable.

◆ CMU_IntGet()

uint32_t CMU_IntGet ( void )
inline

Get pending CMU interrupt sources.

Returns
CMU interrupt sources pending.

◆ CMU_IntGetEnabled()

uint32_t CMU_IntGetEnabled ( void )
inline

Get enabled and pending CMU interrupt flags.

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

Note
The event bits are not cleared by the use of this function.
Returns
Pending and enabled CMU interrupt sources. The return value is the bitwise AND of
  • the enabled interrupt sources in CMU_IEN and
  • the pending interrupt flags CMU_IF

◆ CMU_IntSet()

void CMU_IntSet ( uint32_t flags )
inline

Set one or more pending CMU interrupt sources.

Parameters
[in] flags CMU interrupt sources to set to pending.

◆ CMU_Lock()

void CMU_Lock ( void )
inline

Lock CMU register access in order to protect registers contents against unintended modification.

See the reference manual for CMU registers that will be locked.

Note
If locking the CMU registers, they must be unlocked prior to using any CMU API functions modifying CMU registers protected by the lock.

◆ CMU_OscillatorEnable()

void CMU_OscillatorEnable ( CMU_Osc_TypeDef osc,
bool enable,
bool wait
)
inline

Enable/disable oscillator.

Note
This is a dummy function to solve backward compatibility issues.
Parameters
[in] osc The oscillator to enable/disable.
[in] enable
  • true - enable specified oscillator.
  • false - disable specified oscillator.
[in] wait Only used if enable is true.
  • true - wait for oscillator start-up time to timeout before returning.
  • false - do not wait for oscillator start-up time to timeout before returning.

◆ CMU_Unlock()

void CMU_Unlock ( void )
inline

Unlock CMU register access so that writing to registers is possible.

◆ CMU_WdogLock()

void CMU_WdogLock ( void )
inline

Lock WDOG register access in order to protect registers contents against unintended modification.

Note
If locking the WDOG registers, they must be unlocked prior to using any emlib API functions modifying registers protected by the lock.

◆ CMU_WdogUnlock()

void CMU_WdogUnlock ( void )
inline

Unlock WDOG register access so that writing to registers is possible.

◆ CMU_PrescToLog2()

uint32_t CMU_PrescToLog2 ( uint32_t presc )
inline

Convert prescaler divider to a logarithmic value.

It only works for even numbers equal to 2^n.

Parameters
[in] presc Prescaler value used to set the frequency divider. The divider is equal to ('presc' + 1). If a divider value is passed for 'presc', 'presc' will be equal to (divider - 1).
Returns
Logarithm base 2 (binary) value, i.e. exponent as used by fixed 2^n prescalers.

Macro Definition Documentation

◆ CMU_CLOCK_SELECT_SET

#define CMU_CLOCK_SELECT_SET ( clock,
sel
) CMU_##clock##_SELECT_##sel

Macro to set clock sources in the clock tree.

◆ CMU_HFRCODPLL_MIN

#define CMU_HFRCODPLL_MIN cmuHFRCODPLLFreq_1M0Hz

HFRCODPLL maximum frequency.

◆ CMU_HFRCODPLL_MAX

#define CMU_HFRCODPLL_MAX cmuHFRCODPLLFreq_80M0Hz

HFRCODPLL minimum frequency.

◆ CMU_HFRCOEM23_MIN

#define CMU_HFRCOEM23_MIN cmuHFRCOEM23Freq_1M0Hz

HFRCOEM23 maximum frequency.

◆ CMU_HFRCOEM23_MAX

#define CMU_HFRCOEM23_MAX cmuHFRCOEM23Freq_40M0Hz

HFRCOEM23 minimum frequency.

◆ CMU_LFXOINIT_DEFAULT

#define CMU_LFXOINIT_DEFAULT
Value:
{ \
1, \
38, \
cmuLfxoStartupDelay_4KCycles, \
cmuLfxoOscMode_Crystal, \
false, /* highAmplitudeEn */ \
true, /* agcEn */ \
false, /* failDetEM4WUEn */ \
false, /* failDetEn */ \
false, /* DisOndemand */ \
false, /* ForceEn */ \
false /* Lock registers */ \
}

Default LFXO initialization values for XTAL mode.

◆ CMU_LFXOINIT_EXTERNAL_CLOCK

#define CMU_LFXOINIT_EXTERNAL_CLOCK
Value:
{ \
0U, \
0U, \
cmuLfxoStartupDelay_2Cycles, \
cmuLfxoOscMode_External, \
false, /* highAmplitudeEn */ \
false, /* agcEn */ \
false, /* failDetEM4WUEn */ \
false, /* failDetEn */ \
false, /* DisOndemand */ \
false, /* ForceEn */ \
false /* Lock registers */ \
}

Default LFXO initialization values for external clock mode.

◆ CMU_LFXOINIT_EXTERNAL_SINE

#define CMU_LFXOINIT_EXTERNAL_SINE
Value:
{ \
0U, \
0U, \
cmuLfxoStartupDelay_2Cycles, \
cmuLfxoOscMode_AcCoupledSine, \
false, /* highAmplitudeEn */ \
false, /* agcEn */ \
false, /* failDetEM4WUEn */ \
false, /* failDetEn */ \
false, /* DisOndemand */ \
false, /* ForceEn */ \
false /* Lock registers */ \
}

Default LFXO initialization values for external sine mode.

◆ CMU_HFXOINIT_DEFAULT

#define CMU_HFXOINIT_DEFAULT
Value:
{ \
cmuHfxoCbLsbTimeout_416us, \
cmuHfxoSteadyStateTimeout_833us, /* First lock */ \
cmuHfxoSteadyStateTimeout_83us, /* Subsequent locks */ \
0U, /* ctuneXoStartup */ \
0U, /* ctuneXiStartup */ \
32U, /* coreBiasStartup */ \
32U, /* imCoreBiasStartup */ \
cmuHfxoCoreDegen_None, \
cmuHfxoCtuneFixCap_Both, \
_HFXO_XTALCTRL_CTUNEXOANA_DEFAULT, /* ctuneXoAna */ \
_HFXO_XTALCTRL_CTUNEXIANA_DEFAULT, /* ctuneXiAna */ \
60U, /* coreBiasAna */ \
false, /* enXiDcBiasAna */ \
cmuHfxoOscMode_Crystal, \
false, /* forceXo2GndAna */ \
false, /* forceXi2GndAna */ \
false, /* DisOndemand */ \
false, /* ForceEn */ \
false /* Lock registers */ \
}

Default HFXO initialization values for XTAL mode.

◆ CMU_HFXOINIT_EXTERNAL_SINE

#define CMU_HFXOINIT_EXTERNAL_SINE
Value:
{ \
( CMU_HfxoCbLsbTimeout_TypeDef )0, /* timeoutCbLsb */ \
( CMU_HfxoSteadyStateTimeout_TypeDef )0, /* timeoutSteady, first lock */ \
( CMU_HfxoSteadyStateTimeout_TypeDef )0, /* timeoutSteady, subseq. locks */ \
0U, /* ctuneXoStartup */ \
0U, /* ctuneXiStartup */ \
0U, /* coreBiasStartup */ \
0U, /* imCoreBiasStartup */ \
cmuHfxoCoreDegen_None , \
cmuHfxoCtuneFixCap_None , \
0U, /* ctuneXoAna */ \
0U, /* ctuneXiAna */ \
0U, /* coreBiasAna */ \
false , /* enXiDcBiasAna, false=DC true=AC coupling of signal */ \
cmuHfxoOscMode_ExternalSine , \
false , /* forceXo2GndAna */ \
false , /* forceXi2GndAna (Never enable in sine mode) */ \
false , /* DisOndemand */ \
false , /* ForceEn */ \
false /* Lock registers */ \
}

Default HFXO initialization values for external sine mode.

◆ CMU_HFXOINIT_EXTERNAL_SINEPKDET

#define CMU_HFXOINIT_EXTERNAL_SINEPKDET
Value:
{ \
( CMU_HfxoCbLsbTimeout_TypeDef )0, /* timeoutCbLsb */ \
( CMU_HfxoSteadyStateTimeout_TypeDef )0, /* timeoutSteady, first lock */ \
( CMU_HfxoSteadyStateTimeout_TypeDef )0, /* timeoutSteady, subseq. locks */ \
0U, /* ctuneXoStartup */ \
0U, /* ctuneXiStartup */ \
0U, /* coreBiasStartup */ \
0U, /* imCoreBiasStartup */ \
cmuHfxoCoreDegen_None , \
cmuHfxoCtuneFixCap_None , \
0U, /* ctuneXoAna */ \
0U, /* ctuneXiAna */ \
0U, /* coreBiasAna */ \
false , /* enXiDcBiasAna, false=DC true=AC coupling of signal */ \
cmuHfxoOscMode_ExternalSinePkDet, \
false , /* forceXo2GndAna */ \
false , /* forceXi2GndAna (Never enable in sine mode) */ \
false , /* DisOndemand */ \
false , /* ForceEn */ \
false /* Lock registers */ \
}

Default HFXO initialization values for external sine mode with peak detector.

◆ CMU_DPLL_LFXO_TO_40MHZ

#define CMU_DPLL_LFXO_TO_40MHZ
Value:
{ \
39998805, /* Target frequency. */ \
3661, /* Factor N. */ \
2, /* Factor M. */ \
cmuSelect_LFXO, /* Select LFXO as reference clock. */ \
cmuDPLLEdgeSel_Fall, /* Select falling edge of ref clock. */ \
cmuDPLLLockMode_Freq, /* Use frequency lock mode. */ \
true, /* Enable automatic lock recovery. */ \
false /* Don't enable dither function. */ \
}

DPLL initialization values for 39,998,805 Hz using LFXO as reference clock, M=2 and N=3661.

◆ CMU_DPLL_HFXO_TO_76_8MHZ

#define CMU_DPLL_HFXO_TO_76_8MHZ
Value:
{ \
76800000, /* Target frequency. */ \
3839, /* Factor N. */ \
1919, /* Factor M. */ \
cmuSelect_HFXO, /* Select HFXO as reference clock. */ \
cmuDPLLEdgeSel_Fall, /* Select falling edge of ref clock. */ \
cmuDPLLLockMode_Freq, /* Use frequency lock mode. */ \
true, /* Enable automatic lock recovery. */ \
false /* Don't enable dither function. */ \
}

DPLL initialization values for 76,800,000 Hz using HFXO as reference clock, M = 1919, N = 3839.

◆ CMU_DPLL_HFXO_TO_80MHZ

#define CMU_DPLL_HFXO_TO_80MHZ
Value:
{ \
80000000, /* Target frequency. */ \
(4000 - 1), /* Factor N. */ \
(1920 - 1), /* Factor M. */ \
cmuSelect_HFXO, /* Select HFXO as reference clock. */ \
cmuDPLLEdgeSel_Fall, /* Select falling edge of ref clock. */ \
cmuDPLLLockMode_Freq, /* Use frequency lock mode. */ \
true, /* Enable automatic lock recovery. */ \
false /* Don't enable dither function. */ \
}

DPLL initialization values for 80,000,000 Hz using HFXO as reference clock, M = 1919, N = 3999.

◆ CMU_DPLLINIT_DEFAULT

#define CMU_DPLLINIT_DEFAULT
Value:
{ \
80000000, /* Target frequency. */ \
(4000 - 1), /* Factor N. */ \
(1920 - 1), /* Factor M. */ \
cmuSelect_HFXO, /* Select HFXO as reference clock. */ \
cmuDPLLEdgeSel_Fall, /* Select falling edge of ref clock. */ \
cmuDPLLLockMode_Freq, /* Use frequency lock mode. */ \
true, /* Enable automatic lock recovery. */ \
false /* Don't enable dither function. */ \
}

Default configurations for DPLL initialization.

When using this macro you need to modify the N and M factor and the desired frequency to match the components placed on the board.

Typedef Documentation

◆ CMU_ClkDiv_TypeDef

typedef uint32_t CMU_ClkDiv_TypeDef

Clock divider configuration.

Enumeration Type Documentation

◆ CMU_HFRCODPLLFreq_TypeDef

enum CMU_HFRCODPLLFreq_TypeDef

HFRCODPLL frequency bands.

Enumerator
cmuHFRCODPLLFreq_1M0Hz

1MHz RC band.


cmuHFRCODPLLFreq_2M0Hz

2MHz RC band.


cmuHFRCODPLLFreq_4M0Hz

4MHz RC band.


cmuHFRCODPLLFreq_7M0Hz

7MHz RC band.


cmuHFRCODPLLFreq_13M0Hz

13MHz RC band.

cmuHFRCODPLLFreq_16M0Hz

16MHz RC band.

cmuHFRCODPLLFreq_19M0Hz

19MHz RC band.

cmuHFRCODPLLFreq_26M0Hz

26MHz RC band.

cmuHFRCODPLLFreq_32M0Hz

32MHz RC band.

cmuHFRCODPLLFreq_38M0Hz

38MHz RC band.

cmuHFRCODPLLFreq_48M0Hz

48MHz RC band.

cmuHFRCODPLLFreq_56M0Hz

56MHz RC band.

cmuHFRCODPLLFreq_64M0Hz

64MHz RC band.

cmuHFRCODPLLFreq_80M0Hz

80MHz RC band.

◆ CMU_HFRCOEM23Freq_TypeDef

enum CMU_HFRCOEM23Freq_TypeDef

HFRCOEM23 frequency bands.

Enumerator
cmuHFRCOEM23Freq_1M0Hz

1MHz RC band.


cmuHFRCOEM23Freq_2M0Hz

2MHz RC band.


cmuHFRCOEM23Freq_4M0Hz

4MHz RC band.


cmuHFRCOEM23Freq_13M0Hz

13MHz RC band.

cmuHFRCOEM23Freq_16M0Hz

16MHz RC band.

cmuHFRCOEM23Freq_19M0Hz

19MHz RC band.

cmuHFRCOEM23Freq_26M0Hz

26MHz RC band.

cmuHFRCOEM23Freq_32M0Hz

32MHz RC band.

cmuHFRCOEM23Freq_40M0Hz

40MHz RC band.

◆ CMU_Clock_TypeDef

enum CMU_Clock_TypeDef

Clock points in CMU clock-tree.

Enumerator
cmuClock_SYSCLK

System clock.


cmuClock_HCLK

Core and AHB bus interface clock.

cmuClock_EXPCLK

Export clock.

cmuClock_PCLK

Peripheral APB bus interface clock.

cmuClock_LSPCLK

Low speed peripheral APB bus interface clock.

cmuClock_IADCCLK

IADC clock.

cmuClock_EM01GRPACLK

EM01GRPA clock.

cmuClock_EM23GRPACLK

EM23GRPA clock.

cmuClock_EM4GRPACLK

EM4GRPA clock.

cmuClock_WDOG0CLK

WDOG0 clock.

cmuClock_WDOG1CLK

WDOG1 clock.

cmuClock_DPLLREFCLK

DPLL reference clock.

cmuClock_TRACECLK

Debug trace clock.

cmuClock_RTCCCLK

RTCC clock.

cmuClock_CORE

Cortex-M33 core clock.

cmuClock_SYSTICK

Optional Cortex-M33 SYSTICK clock.

cmuClock_ACMP0

ACMP0 clock.

cmuClock_ACMP1

ACMP1 clock.

cmuClock_BURTC

BURTC clock.

cmuClock_GPCRC

GPCRC clock.

cmuClock_GPIO

GPIO clock.

cmuClock_I2C0

I2C0 clock.

cmuClock_I2C1

I2C1 clock.

cmuClock_IADC0

IADC clock.

cmuClock_LDMA

LDMA clock.

cmuClock_LETIMER0

LETIMER clock.

cmuClock_PRS

PRS clock.

cmuClock_RTCC

RTCC clock.

cmuClock_TIMER0

TIMER0 clock.

cmuClock_TIMER1

TIMER1 clock.

cmuClock_TIMER2

TIMER2 clock.

cmuClock_TIMER3

TIMER3 clock.

cmuClock_USART0

USART0 clock.

cmuClock_USART1

USART1 clock.

cmuClock_USART2

USART2 clock.

cmuClock_WDOG0

WDOG0 clock.

cmuClock_WDOG1

WDOG1 clock.

cmuClock_PDM

PDM clock.

◆ CMU_Osc_TypeDef

enum CMU_Osc_TypeDef

Clock points in CMU clock-tree.

Oscillator types.

Enumerator
cmuOsc_LFXO

Low frequency crystal oscillator.

cmuOsc_LFRCO

Low frequency RC oscillator.

cmuOsc_FSRCO

Fast startup fixed frequency RC oscillator.

cmuOsc_HFXO

High frequency crystal oscillator.

cmuOsc_HFRCODPLL

High frequency RC and DPLL oscillator.

cmuOsc_HFRCOEM23

High frequency deep sleep RC oscillator.

cmuOsc_ULFRCO

Ultra low frequency RC oscillator.

◆ CMU_Select_TypeDef

enum CMU_Select_TypeDef

Selectable clock sources.

Enumerator
cmuSelect_Error

Usage error.

cmuSelect_Disabled

Clock selector disabled.

cmuSelect_FSRCO

Fast startup fixed frequency RC oscillator.

cmuSelect_HFXO

High frequency crystal oscillator.

cmuSelect_HFRCODPLL

High frequency RC and DPLL oscillator.

cmuSelect_HFRCOEM23

High frequency deep sleep RC oscillator.

cmuSelect_CLKIN0

External clock input.

cmuSelect_LFXO

Low frequency crystal oscillator.

cmuSelect_LFRCO

Low frequency RC oscillator.

cmuSelect_ULFRCO

Ultra low frequency RC oscillator.

cmuSelect_PCLK

Peripheral APB bus interface clock.

cmuSelect_HCLK

Core and AHB bus interface clock.

cmuSelect_HCLKDIV1024

Prescaled HCLK frequency clock.

cmuSelect_EM01GRPACLK

EM01GRPA clock.

cmuSelect_EM23GRPACLK

EM23GRPA clock.

cmuSelect_EXPCLK

Pin export clock.

cmuSelect_PRS

PRS input as clock.

◆ CMU_DPLLEdgeSel_TypeDef

enum CMU_DPLLEdgeSel_TypeDef

DPLL reference clock edge detect selector.

Enumerator
cmuDPLLEdgeSel_Fall

Detect falling edge of reference clock.

cmuDPLLEdgeSel_Rise

Detect rising edge of reference clock.

◆ CMU_DPLLLockMode_TypeDef

enum CMU_DPLLLockMode_TypeDef

DPLL lock mode selector.

Enumerator
cmuDPLLLockMode_Freq

Frequency lock mode.

cmuDPLLLockMode_Phase

Phase lock mode.

◆ CMU_LfxoOscMode_TypeDef

enum CMU_LfxoOscMode_TypeDef

LFXO oscillator modes.

Enumerator
cmuLfxoOscMode_Crystal

Crystal oscillator.

cmuLfxoOscMode_AcCoupledSine

External AC coupled sine.

cmuLfxoOscMode_External

External digital clock.

◆ CMU_LfxoStartupDelay_TypeDef

enum CMU_LfxoStartupDelay_TypeDef

LFXO start-up timeout delay.

Enumerator
cmuLfxoStartupDelay_2Cycles

2 cycles start-up delay.

cmuLfxoStartupDelay_256Cycles

256 cycles start-up delay.

cmuLfxoStartupDelay_1KCycles

1K cycles start-up delay.

cmuLfxoStartupDelay_2KCycles

2K cycles start-up delay.

cmuLfxoStartupDelay_4KCycles

4K cycles start-up delay.

cmuLfxoStartupDelay_8KCycles

8K cycles start-up delay.

cmuLfxoStartupDelay_16KCycles

16K cycles start-up delay.

cmuLfxoStartupDelay_32KCycles

32K cycles start-up delay.

◆ CMU_HfxoOscMode_TypeDef

enum CMU_HfxoOscMode_TypeDef

HFXO oscillator modes.

Enumerator
cmuHfxoOscMode_Crystal

Crystal oscillator.

cmuHfxoOscMode_ExternalSine

External digital clock.

◆ CMU_HfxoCbLsbTimeout_TypeDef

enum CMU_HfxoCbLsbTimeout_TypeDef

HFXO core bias LSB change timeout.

Enumerator
cmuHfxoCbLsbTimeout_8us

8 us timeout.

cmuHfxoCbLsbTimeout_20us

20 us timeout.

cmuHfxoCbLsbTimeout_41us

41 us timeout.

cmuHfxoCbLsbTimeout_62us

62 us timeout.

cmuHfxoCbLsbTimeout_83us

83 us timeout.

cmuHfxoCbLsbTimeout_104us

104 us timeout.

cmuHfxoCbLsbTimeout_125us

125 us timeout.

cmuHfxoCbLsbTimeout_166us

166 us timeout.

cmuHfxoCbLsbTimeout_208us

208 us timeout.

cmuHfxoCbLsbTimeout_250us

250 us timeout.

cmuHfxoCbLsbTimeout_333us

333 us timeout.

cmuHfxoCbLsbTimeout_416us

416 us timeout.

cmuHfxoCbLsbTimeout_833us

833 us timeout.

cmuHfxoCbLsbTimeout_1250us

1250 us timeout.

cmuHfxoCbLsbTimeout_2083us

2083 us timeout.

cmuHfxoCbLsbTimeout_3750us

3750 us timeout.

◆ CMU_HfxoSteadyStateTimeout_TypeDef

enum CMU_HfxoSteadyStateTimeout_TypeDef

HFXO steady state timeout.

Enumerator
cmuHfxoSteadyStateTimeout_16us

16 us timeout.

cmuHfxoSteadyStateTimeout_41us

41 us timeout.

cmuHfxoSteadyStateTimeout_83us

83 us timeout.

cmuHfxoSteadyStateTimeout_125us

125 us timeout.

cmuHfxoSteadyStateTimeout_166us

166 us timeout.

cmuHfxoSteadyStateTimeout_208us

208 us timeout.

cmuHfxoSteadyStateTimeout_250us

250 us timeout.

cmuHfxoSteadyStateTimeout_333us

333 us timeout.

cmuHfxoSteadyStateTimeout_416us

416 us timeout.

cmuHfxoSteadyStateTimeout_500us

500 us timeout.

cmuHfxoSteadyStateTimeout_666us

666 us timeout.

cmuHfxoSteadyStateTimeout_833us

833 us timeout.

cmuHfxoSteadyStateTimeout_1666us

1666 us timeout.

cmuHfxoSteadyStateTimeout_2500us

2500 us timeout.

cmuHfxoSteadyStateTimeout_4166us

4166 us timeout.

cmuHfxoSteadyStateTimeout_7500us

7500 us timeout.

◆ CMU_HfxoCoreDegen_TypeDef

enum CMU_HfxoCoreDegen_TypeDef

HFXO core degeneration control.

Enumerator
cmuHfxoCoreDegen_None

No core degeneration.

cmuHfxoCoreDegen_33

Core degeneration control 33.

cmuHfxoCoreDegen_50

Core degeneration control 50.

cmuHfxoCoreDegen_100

Core degeneration control 100.

◆ CMU_HfxoCtuneFixCap_TypeDef

enum CMU_HfxoCtuneFixCap_TypeDef

HFXO XI and XO pin fixed capacitor control.

Enumerator
cmuHfxoCtuneFixCap_None

No fixed capacitors.

cmuHfxoCtuneFixCap_Xi

Fixed capacitor on XI pin.

cmuHfxoCtuneFixCap_Xo

Fixed capacitor on XO pin.

cmuHfxoCtuneFixCap_Both

Fixed capacitor on both pins.

◆ CMU_Precision_TypeDef

enum CMU_Precision_TypeDef

Oscillator precision modes.

Enumerator
cmuPrecisionDefault

Default precision mode.

cmuPrecisionHigh

High precision mode.