:orphan:

.. title:: CONFIG_NRF52_ANOMALY_132_DELAY_US

.. kconfig:: CONFIG_NRF52_ANOMALY_132_DELAY_US

CONFIG_NRF52_ANOMALY_132_DELAY_US
#################################

*Anomaly 132 workaround delay (microseconds)*

*Anomaly 132 workaround delay (microseconds)*

Type: ``int``

Help
====

.. code-block:: none

    Due to Anomaly 132 LF RC source may not start if restarted in certain
    window after stopping (230 us to 330 us). Software reset also stops the
    clock so if clock is initiated in certain window, the clock may also fail
    to start at reboot. A delay is added before starting LF clock to ensure
    that anomaly conditions are not met. Delay should be long enough to ensure
    that clock is started later than 330 us after reset. If crystal oscillator
    (XO) is used then low frequency clock initially starts with RC and then
    seamlessly switches to XO which has much longer startup time thus,
    depending on application, workaround may also need to be applied.
    Additional drivers initialization increases initialization time and delay
    may be shortened. Workaround is disabled by setting delay to 0.

Help
====

.. code-block:: none

    Due to Anomaly 132 LF RC source may not start if restarted in certain
    window after stopping (230 us to 330 us). Software reset also stops the
    clock so if clock is initiated in certain window, the clock may also fail
    to start at reboot. A delay is added before starting LF clock to ensure
    that anomaly conditions are not met. Delay should be long enough to ensure
    that clock is started later than 330 us after reset. If crystal oscillator
    (XO) is used then low frequency clock initially starts with RC and then
    seamlessly switches to XO which has much longer startup time thus,
    depending on application, workaround may also need to be applied.
    Additional drivers initialization increases initialization time and delay
    may be shortened. Workaround is disabled by setting delay to 0.

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

(\ :kconfig:`NRF52_ANOMALY_132_WORKAROUND <CONFIG_NRF52_ANOMALY_132_WORKAROUND>` && \ :kconfig:`SOC_FAMILY_NRF <CONFIG_SOC_FAMILY_NRF>`) || (\ :kconfig:`NRF52_ANOMALY_132_WORKAROUND <CONFIG_NRF52_ANOMALY_132_WORKAROUND>` && \ :kconfig:`SOC_FAMILY_NRF <CONFIG_SOC_FAMILY_NRF>`)

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

Defaults
========

- 330
- 330

Kconfig definitions
===================



At ``<Zephyr SoC>/arm/nordic_nrf/nrf52/Kconfig.soc:472``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:38`` → ``<Zephyr SoC>/Kconfig:15`` → ``<BuildDir>/kconfig/Kconfig.soc.arch:2`` → ``<Zephyr SoC>/arm/nordic_nrf/Kconfig:17``

Menu path: (Top) → Hardware Configuration

.. code-block:: kconfig

    config NRF52_ANOMALY_132_DELAY_US
    	int "Anomaly 132 workaround delay (microseconds)"
    	range 0 330
    	default 330
    	depends on NRF52_ANOMALY_132_WORKAROUND && SOC_FAMILY_NRF
    	help
    	  Due to Anomaly 132 LF RC source may not start if restarted in certain
    	  window after stopping (230 us to 330 us). Software reset also stops the
    	  clock so if clock is initiated in certain window, the clock may also fail
    	  to start at reboot. A delay is added before starting LF clock to ensure
    	  that anomaly conditions are not met. Delay should be long enough to ensure
    	  that clock is started later than 330 us after reset. If crystal oscillator
    	  (XO) is used then low frequency clock initially starts with RC and then
    	  seamlessly switches to XO which has much longer startup time thus,
    	  depending on application, workaround may also need to be applied.
    	  Additional drivers initialization increases initialization time and delay
    	  may be shortened. Workaround is disabled by setting delay to 0.

----

At ``<Zephyr SoC>/arm/nordic_nrf/nrf52/Kconfig.soc:472``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:38`` → ``<Zephyr SoC>/Kconfig:18`` → ``<Zephyr SoC>/arm/nordic_nrf/Kconfig:17``

Menu path: (Top) → Hardware Configuration

.. code-block:: kconfig

    config NRF52_ANOMALY_132_DELAY_US
    	int "Anomaly 132 workaround delay (microseconds)"
    	range 0 330
    	default 330
    	depends on NRF52_ANOMALY_132_WORKAROUND && SOC_FAMILY_NRF
    	help
    	  Due to Anomaly 132 LF RC source may not start if restarted in certain
    	  window after stopping (230 us to 330 us). Software reset also stops the
    	  clock so if clock is initiated in certain window, the clock may also fail
    	  to start at reboot. A delay is added before starting LF clock to ensure
    	  that anomaly conditions are not met. Delay should be long enough to ensure
    	  that clock is started later than 330 us after reset. If crystal oscillator
    	  (XO) is used then low frequency clock initially starts with RC and then
    	  seamlessly switches to XO which has much longer startup time thus,
    	  depending on application, workaround may also need to be applied.
    	  Additional drivers initialization increases initialization time and delay
    	  may be shortened. Workaround is disabled by setting delay to 0.

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