4.2.3 CLKCTRL with Clock Failure Detection
Clock Controller with Auto-tuning and Clock Failure Detection
4.2.3.1 Introduction
The CLKCTRL controls, distributes and prescales the clock signals from the available oscillators. The CLKCTRL supports internal and external clock sources. This CLKCTRL module has an auto-tune feature that can be used to improve the accuracy of the internal oscillator. In addition, it also has Clock Failure Detection (CFD) that allows the device to continue operating if an external crystal oscillator or clock source should fail.
4.2.3.2 Supported Device Families
| AVR® DB | AVR® DD | AVR® Ex |
4.2.3.3 Required header files:
#include "mcc_generated_files/system/clock.h"4.2.3.4 Module Documentation
4.2.3.4.1 CLKCTRL
This header file provides APIs for the CLKCTRL driver.
Module description
This header file provides APIs for the CLKCTRL driver.
Functions
void CLOCK_Initialize (void)
Initializes the CLKCTRL module.
void CFD_Enable (CLKCTRL_CFDSRC_t cfd_source)
Enables the Clock Failure Detection on the main clock.
void CFD_Disable ()
Disables the Clock Failure Detection on the main clock.
Function Documentation
CFD_Disable()
void CFD_Disable ( )
Disables the Clock Failure Detection on the main clock.
| None. |
None. |
CFD_Enable()
void CFD_Enable (CLKCTRL_CFDSRC_t cfd_source)
Enables the Clock Failure Detection on the main clock.
| CLKCTRL_CFDSRC_t |
cfd_source - main clock source for CFD |
None. |
CLOCK_Initialize()
void CLOCK_Initialize (void )
Initializes the CLKCTRL module.
| None. |
None. |
4.2.3.5 File Documentation
4.2.3.5.1 source/clock.c File Reference
#include "../clock.h"
Functions
void CLOCK_Initialize (void)
Initializes the CLKCTRL module.
void CFD_Enable (CLKCTRL_CFDSRC_t cfd_source)
Enables the Clock Failure Detection on the main clock.
void CFD_Disable ()
Disables the Clock Failure Detection on the main clock.
4.2.3.5.2 source/clock.h File Reference
#include "ccp.h"
Functions
void CLOCK_Initialize (void)
Initializes the CLKCTRL module.
void CFD_Enable (CLKCTRL_CFDSRC_t cfd_source)
Enables the Clock Failure Detection on the main clock.
void CFD_Disable ()
Disables the Clock Failure Detection on the main clock.
Macros
#define F_CPU 4000000UL
Macro Definition Documentation
F_CPU
#define F_CPU 4000000UL