atmega328p::clock Namespace Reference

Clock source and prescaler definitions. More...

Enumerations
enum class	Source : uint8_t {   ExternalClock , LowPowerCrystal , FullSwingCrystal , LowFrequencyCrystal ,   InternalCalibratedRC , Internal128kHzRC }
	Clock or interrupt source identifiers. More...
enum class	Domain : uint8_t { CPU , IO , Flash , ADC }
	Clock domains. More...
enum class	CKSELCode : uint8_t {   ExternalClock = 0x00 , Reserved = 0x01 , InternalCalibratedRC = 0x02 , Internal128kHzRC = 0x03 ,   LowFrequencyCrystalMinimum = 0x04 , LowFrequencyCrystalMaximum = 0x05 , FullSwingCrystalMinimum = 0x06 , FullSwingCrystalMaximum = 0x07 ,   LowPowerCrystalMinimum = 0x08 , LowPowerCrystalMaximum = 0x0F }
	Clock-source fuse encodings. More...
enum class	SUTCode : uint8_t { SUT00 = 0 , SUT01 = 1 , SUT10 = 2 , SUT11 = 3 }
	Startup-time fuse encodings. More...
enum class	Prescaler : uint16_t {   Divide1 = 1 , Divide2 = 2 , Divide4 = 4 , Divide8 = 8 ,   Divide16 = 16 , Divide32 = 32 , Divide64 = 64 , Divide128 = 128 ,   Divide256 = 256 }
	Clock prescaler selections. More...
enum	: uint32_t {   internal_calibrated_rc_hz = 8000000UL , internal_rc_nominal_hz = 8000000UL , family_datasheet_internal_rc_user_calibrated_min_hz = 7300000UL , family_datasheet_internal_rc_user_calibrated_max_hz = 8100000UL ,   internal_128khz_rc_hz = 128000UL , timer2_async_crystal_hz = 32768UL , factory_default_oscillator_hz = 8000000UL , factory_default_cpu_hz = 1000000UL }
enum	: uint16_t {   factory_default_divisor = 8U , system_prescaler_count = 9U , startup_delay_from_reset_cycles = 19U , factory_default_startup_additional_delay_ms = 65U ,   rstdisbl_sut00_additional_delay_ms = 4U , startup_delay_corrected_from_14_to_19_ck = 1 }
enum	: uint32_t {   standard_max_cpu_hz_at_1v8 = 4000000UL , standard_max_cpu_hz_at_2v7 = 10000000UL , standard_max_cpu_hz_at_4v5 = 20000000UL , automotive_max_cpu_hz_at_2v7 = 8000000UL ,   automotive_max_cpu_hz_at_4v5 = 16000000UL }
enum	: uint8_t {   timer2_tosc1_pin_value = 0x06U , timer2_tosc2_pin_value = 0x07U , clock_output_pin_value = 0x00U , internal_rc_frequency_depends_on_voltage_and_temperature = 1 ,   internal_rc_factory_calibration_provided = 1 , internal_rc_user_calibration_supported = 1 , osccal_width_bits = 7U , osccal_max_value = 0x7FU ,   internal_rc_factory_accuracy_percent = 10U , internal_rc_user_accuracy_percent = 1U }
enum	: uint16_t { internal_rc_factory_calibration_vcc_mv = 3000U , internal_rc_user_min_vcc_mv = 1800U , internal_rc_user_max_vcc_mv = 5500U , internal_128khz_rc_nominal_vcc_mv = 3000U }
enum	: int16_t { internal_rc_factory_calibration_temperature_c = 25 , internal_rc_user_min_temperature_c = -40 , internal_rc_user_max_temperature_c = 85 , internal_128khz_rc_nominal_temperature_c = 25 }

Detailed Description

Clock source and prescaler definitions.

Enumeration Type Documentation

anonymous enum

anonymous enum : uint16_t

Enumerator
factory_default_divisor	Factory default divisor.
system_prescaler_count	Number of system prescaler.
startup_delay_from_reset_cycles	Startup delay from reset (clock cycles).
factory_default_startup_additional_delay_ms	Factory default startup additional delay (ms).
rstdisbl_sut00_additional_delay_ms	RSTDISBL sut00 additional delay (ms).
startup_delay_corrected_from_14_to_19_ck	Startup delay corrected from 14 to 19 ck.

anonymous enum

anonymous enum : uint8_t

Enumerator
timer2_tosc1_pin_value	Timer2 tosc1 logical pin encoding.
timer2_tosc2_pin_value	Timer2 tosc2 logical pin encoding.
clock_output_pin_value	Clock output logical pin encoding.
internal_rc_frequency_depends_on_voltage_and_temperature	Internal RC frequency depends on voltage and temperature.
internal_rc_factory_calibration_provided	Internal RC factory calibration provided.
internal_rc_user_calibration_supported	Internal RC user calibration supported.
osccal_width_bits	OSCCAL width width (bits).
osccal_max_value	OSCCAL max value.
internal_rc_factory_accuracy_percent	Internal RC factory accuracy percent.
internal_rc_user_accuracy_percent	Internal RC user accuracy percent.

anonymous enum

anonymous enum : uint32_t

Enumerator
internal_calibrated_rc_hz	Internal calibrated RC (Hz).
internal_rc_nominal_hz	Internal RC nominal (Hz).
family_datasheet_internal_rc_user_calibrated_min_hz	Family datasheet internal RC user calibrated min (Hz).
family_datasheet_internal_rc_user_calibrated_max_hz	Family datasheet internal RC user calibrated max (Hz).
internal_128khz_rc_hz	Internal 128khz RC (Hz).
timer2_async_crystal_hz	Timer2 async crystal (Hz).
factory_default_oscillator_hz	Factory default oscillator (Hz).
factory_default_cpu_hz	Factory default CPU (Hz).

anonymous enum

anonymous enum : int16_t

Enumerator
internal_rc_factory_calibration_temperature_c	Internal RC factory calibration temperature c.
internal_rc_user_min_temperature_c	Internal RC user min temperature c.
internal_rc_user_max_temperature_c	Internal RC user max temperature c.
internal_128khz_rc_nominal_temperature_c	Internal 128khz RC nominal temperature c.

anonymous enum

anonymous enum : uint16_t

Enumerator
internal_rc_factory_calibration_vcc_mv	Internal RC factory calibration VCC (mV).
internal_rc_user_min_vcc_mv	Internal RC user min VCC (mV).
internal_rc_user_max_vcc_mv	Internal RC user max VCC (mV).
internal_128khz_rc_nominal_vcc_mv	Internal 128khz RC nominal VCC (mV).

anonymous enum

anonymous enum : uint32_t

Enumerator
standard_max_cpu_hz_at_1v8	Standard max CPU hz at 1v8.
standard_max_cpu_hz_at_2v7	Standard max CPU hz at 2v7.
standard_max_cpu_hz_at_4v5	Standard max CPU hz at 4v5.
automotive_max_cpu_hz_at_2v7	Automotive max CPU hz at 2v7.
automotive_max_cpu_hz_at_4v5	Automotive max CPU hz at 4v5.

CKSELCode

enum class atmega328p::clock::CKSELCode : uint8_t

strong

Clock-source fuse encodings.

Enumerator
ExternalClock	0x00 - External clock.
Reserved	0x01 - Reserved clock selection.
InternalCalibratedRC	0x02 - Calibrated internal RC oscillator.
Internal128kHzRC	0x03 - Internal 128 kHz RC oscillator.
LowFrequencyCrystalMinimum	0x04 - Low-frequency crystal selection, lower code.
LowFrequencyCrystalMaximum	0x05 - Low-frequency crystal selection, upper code.
FullSwingCrystalMinimum	0x06 - Full-swing crystal selection, lower code.
FullSwingCrystalMaximum	0x07 - Full-swing crystal selection, upper code.
LowPowerCrystalMinimum	0x08 - Low-power crystal selection, lower code.
LowPowerCrystalMaximum	0x0F - Low-power crystal selection, upper code.

Domain

enum class atmega328p::clock::Domain : uint8_t

strong

Clock domains.

Enumerator
CPU	CPU clock domain.
IO	I/O peripheral clock domain.
Flash	Flash memory clock domain.
ADC	ADC clock domain.

Prescaler

enum class atmega328p::clock::Prescaler : uint16_t

strong

Clock prescaler selections.

Enumerator
Divide1	1 - Divide system clock by 1.
Divide2	2 - Divide system clock by 2.
Divide4	4 - Divide system clock by 4.
Divide8	8 - Divide system clock by 8.
Divide16	16 - Divide system clock by 16.
Divide32	32 - Divide system clock by 32.
Divide64	64 - Divide system clock by 64.
Divide128	128 - Divide system clock by 128.
Divide256	256 - Divide system clock by 256.

Source

enum class atmega328p::clock::Source : uint8_t

strong

Clock or interrupt source identifiers.

Enumerator
ExternalClock	External clock on XTAL1.
LowPowerCrystal	Low-power crystal oscillator.
FullSwingCrystal	Full-swing crystal oscillator.
LowFrequencyCrystal	Low-frequency crystal oscillator.
InternalCalibratedRC	Calibrated internal RC oscillator.
Internal128kHzRC	Internal nominal 128 kHz RC oscillator.

SUTCode

enum class atmega328p::clock::SUTCode : uint8_t

strong

Startup-time fuse encodings.

Enumerator
SUT00	0 - Startup time encoding 00.
SUT01	1 - Startup time encoding 01.
SUT10	2 - Startup time encoding 10.
SUT11	3 - Startup time encoding 11.