CONFIG_SOC_ATMEL_SAM3_EXT_SLCK:

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 accraute and precise timers. The slow clock will be driven by the internal fast RC oscillator running at 32 kHz.

Symbol:

SOC_ATMEL_SAM3_EXT_SLCK

Type:

bool

Value:

“n”

User value:

(no user value)

Visibility:

“n”

Is choice item:

false

Is defined:

true

Is from env.:

false

Is special:

false

Prompts:

• “Atmel SAM3 to use external crystal oscillator for slow clock”

Default values:

• n (value: “n”)
• Condition: (none)

Selects:

(no selects)

Reverse (select-related) dependencies:  

(no reverse dependencies)

Additional dependencies from enclosing menus and ifs:  

ARM && SOC_ATMEL_SAM3 && ARM (value: “n”)

Locations:

• ../arch/arm/soc/atmel_sam3/Kconfig:17