noun
external clock
Computing term for a clock signal supplied from outside a device or circuit, as opposed to an internal clock.
このマイコンは外部クロックで動作する。
This microcontroller operates on an external clock.
Internal clock; a clock signal generated within the device itself, contrasting with 外部クロック.
Compound of 外部 (external) and クロック (clock), a straightforward technical term.