:orphan:

.. title:: CLOCK_NPCX_APB1_PRESCALER

.. option:: CONFIG_CLOCK_NPCX_APB1_PRESCALER

*APB1 prescaler*

Type: ``int``

Help
====

.. code-block:: none

    This sets the APB1 prescaler which changes the frequency of APB1_CLK.
    APB1_CLK frequency = OSC_CLK / APB1_PRE. The APB1 prescaler allowed
    value is from 1 to 10.

    The generated frequency of APB1_CLK should comply with the following
    requirements:
    - The frequency of APB1_CLK must be set to:
    4MHz <= APB1_CLK <= 50MHz.
    - The frequency of APB1_CLK must be an integer division (including 1)
    of the frequency of the Core clock.

Direct dependencies
===================

\ :option:`SOC_FAMILY_NPCX <CONFIG_SOC_FAMILY_NPCX>` && \ :option:`CLOCK_CONTROL <CONFIG_CLOCK_CONTROL>`

*(Includes any dependencies from ifs and menus.)*

Default
=======

- 4

Kconfig definition
==================



At ``<Zephyr Driver>/clock_control/Kconfig.npcx:21``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:32`` → ``<Zephyr Driver>/Kconfig:54`` → ``<Zephyr Driver>/clock_control/Kconfig:43``

Menu path: (Top) → Device Drivers → Hardware clock controller support

.. code-block:: kconfig

    config CLOCK_NPCX_APB1_PRESCALER
    	int "APB1 prescaler"
    	range 1 10
    	default 4
    	depends on SOC_FAMILY_NPCX && CLOCK_CONTROL
    	help
    	  This sets the APB1 prescaler which changes the frequency of APB1_CLK.
    	  APB1_CLK frequency = OSC_CLK / APB1_PRE. The APB1 prescaler allowed
    	  value is from 1 to 10.
	  
    	  The generated frequency of APB1_CLK should comply with the following
    	  requirements:
    	  - The frequency of APB1_CLK must be set to:
    	  4MHz <= APB1_CLK <= 50MHz.
    	  - The frequency of APB1_CLK must be an integer division (including 1)
    	  of the frequency of the Core clock.

*(The 'depends on' condition includes propagated dependencies from ifs and menus.)*