REQ-IFC-004
===========

If a configuration write request is invalid then the firmware shall return an error response and preserve previous valid configuration.

Requirement Impact
------------------

.. image:: /_static/impact/REQ-IFC-004_d156d04c-89f2-4156-9724-dae00d6c83d7_impact.svg
   :alt: Requirement impact for REQ-IFC-004
   :class: dblclick-open-image

Requirement Classification
--------------------------

.. list-table::
   :header-rows: 1
   :widths: 30 70

   * - Field
     - Value
   * - Priority
     - high
   * - Category
     - functional

Acceptance Criteria
-------------------

After 20 invalid write attempts readback values remain unchanged from the last valid configuration in all attempts.

Attachment
----------

- :doc:`Initial Technical Brief v0.2 </generated/attachments/initial-technical-brief-v0-2-a4f82d32-3b49-44f8-85f4-73fceed859f0>`