CONFIG_SOC_ATMEL_SAM4E_EXT_MAINCK

Atmel SAM4E to use external crystal oscillator for main clock

Type: bool

Help

The main clock is being used to drive the PLL, and
thus driving the processor clock.

Says y if you want to use external crystal oscillator
to drive the main clock. Note that this adds about
a second to boot time, as the crystal needs to
stabilize after power-up.

The crystal used here can be from 3 to 20 MHz.

Says n here will use the internal fast RC oscillator
running at 12 MHz.

Help

The main clock is being used to drive the PLL, and
thus driving the processor clock.

Says y if you want to use external crystal oscillator
to drive the main clock. Note that this adds about
a second to boot time, as the crystal needs to
stabilize after power-up.

The crystal used here can be from 3 to 20 MHz.

Says n here will use the internal fast RC oscillator
running at 12 MHz.

Direct dependencies

(SOC_SERIES_SAM4E && SOC_FAMILY_SAM) || (SOC_SERIES_SAM4E && SOC_FAMILY_SAM)

(Includes any dependencies from ifs and menus.)

Defaults

No defaults. Implicitly defaults to n.

Kconfig definitions

At <Zephyr>/soc/arm/atmel_sam/sam4e/Kconfig.soc:40

Included via <Zephyr>/Kconfig:8 → <Zephyr>/Kconfig.zephyr:38 → <Zephyr>/soc/Kconfig:15 → <nRF>/doc/_build/kconfig/Kconfig.soc.arch:2 → <Zephyr>/soc/arm/atmel_sam/Kconfig:17

Menu path: (Top) → Hardware Configuration

config SOC_ATMEL_SAM4E_EXT_MAINCK
    bool "Atmel SAM4E to use external crystal oscillator for main clock"
    depends on SOC_SERIES_SAM4E && SOC_FAMILY_SAM
    help
      The main clock is being used to drive the PLL, and
      thus driving the processor clock.

      Says y if you want to use external crystal oscillator
      to drive the main clock. Note that this adds about
      a second to boot time, as the crystal needs to
      stabilize after power-up.

      The crystal used here can be from 3 to 20 MHz.

      Says n here will use the internal fast RC oscillator
      running at 12 MHz.

At <Zephyr>/soc/arm/atmel_sam/sam4e/Kconfig.soc:40

Included via <Zephyr>/Kconfig:8 → <Zephyr>/Kconfig.zephyr:38 → <Zephyr>/soc/Kconfig:18 → <Zephyr>/soc/arm/atmel_sam/Kconfig:17

Menu path: (Top) → Hardware Configuration

config SOC_ATMEL_SAM4E_EXT_MAINCK
    bool "Atmel SAM4E to use external crystal oscillator for main clock"
    depends on SOC_SERIES_SAM4E && SOC_FAMILY_SAM
    help
      The main clock is being used to drive the PLL, and
      thus driving the processor clock.

      Says y if you want to use external crystal oscillator
      to drive the main clock. Note that this adds about
      a second to boot time, as the crystal needs to
      stabilize after power-up.

      The crystal used here can be from 3 to 20 MHz.

      Says n here will use the internal fast RC oscillator
      running at 12 MHz.

(The ‘depends on’ condition includes propagated dependencies from ifs and menus.)