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CONFIG_SOC_ATMEL_SAM4S_EXT_SLCK
¶
Atmel SAM4S to use external crystal oscillator for slow clock
Type: bool
Help¶
Says y if you want to use external 32 kHz crystal oscillator to drive the slow clock. Note that this adds a few seconds to boot time, as the crystal needs to stabilize after power-up.
Says n if you do not need accurate and precise timers. The slow clock will be driven by the internal fast RC oscillator running at 32 kHz.
Direct dependencies¶
SOC_SERIES_SAM4S
&& SOC_FAMILY_SAM
(Includes any dependencies from ifs and menus.)
Defaults¶
No defaults. Implicitly defaults to n
.
Kconfig definition¶
At <Zephyr>/soc/arm/atmel_sam/sam4s/Kconfig.soc:48
Included via <Zephyr>/Kconfig:8
→ <Zephyr>/Kconfig.zephyr:28
→ <Zephyr>/soc/Kconfig:11
→ <BuildDir>/Kconfig/Kconfig.soc.arch:2
→ <Zephyr>/soc/arm/atmel_sam/Kconfig:17
Menu path: (Top) → Hardware Configuration
config SOC_ATMEL_SAM4S_EXT_SLCK bool "Atmel SAM4S to use external crystal oscillator for slow clock" depends onSOC_SERIES_SAM4S
&&SOC_FAMILY_SAM
help Says y if you want to use external 32 kHz crystal oscillator to drive the slow clock. Note that this adds a few seconds to boot time, as the crystal needs to stabilize after power-up. Says n if you do not need accurate and precise timers. The slow clock will be driven by the internal fast RC oscillator running at 32 kHz.
(The ‘depends on’ condition includes propagated dependencies from ifs and menus.)