HAL_RCC_EnableCSS() function

Enables the Clock Security System.

Syntax

from stm32f4xx_hal_rcc.h:1254

void HAL_RCC_EnableCSS(void);

Implemented in stm32f4xx_hal_rcc.c:841

Return value

None

Notes

If a failure is detected on the HSE oscillator clock, this oscillator is automatically disabled and an interrupt is generated to inform the software about the failure (Clock Security System Interrupt, CSSI), allowing the MCU to perform rescue operations. The CSSI is linked to the Cortex-M4 NMI (Non-Maskable Interrupt) exception vector.

References

Location	Text
stm32f4xx_hal_rcc.c:841	void HAL_RCC_EnableCSS(void)
stm32f4xx_hal_rcc.h:1254	void HAL_RCC_EnableCSS(void);

Data Use

Data read by HAL_RCC_EnableCSS()

FunctionalState::ENABLE

all items filtered out

HAL_RCC_EnableCSS()