38 lines
923 B
ReStructuredText
38 lines
923 B
ReStructuredText
.. _nrf-system-off-sample:
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nRF5x System Off demo
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#####################
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Overview
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********
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This sample can be used for basic power measurement and as an example of
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deep sleep on Nordic platforms.
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RAM Retention
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=============
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On nRF52 platforms this also can demonstrate RAM retention. By selecting
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``CONFIG_APP_RETENTION=y`` state related to number of boots, number of times
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system off was entered, and total uptime since initial power-on are retained
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in a checksummed data structure. The POWER peripheral is configured to keep
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the containing RAM section powered while in system-off mode.
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Requirements
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************
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This application uses nRF51 DK or nRF52 DK board for the demo.
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Sample Output
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=============
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nRF52 core output
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-----------------
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.. code-block:: console
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*** Booting Zephyr OS build v2.3.0-rc1-204-g5f2eb85f728d ***
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nrf52dk_nrf52832 system off demo
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Entering system off; press sw0 to restart
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