doc: tfm: Add diagram to describe granularity

Add diagram to show the granularity differences between each HW. Signed-off-by: Seppo Takalo <[email protected]>
nrfconnect · Dec 23, 2024 · 426dd6c · 426dd6c
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diff --git a/doc/nrf/images/nrf-secure-rom-granularity.svg b/doc/nrf/images/nrf-secure-rom-granularity.svg
diff --git a/doc/nrf/images/secure-flash-regions.svg b/doc/nrf/images/secure-flash-regions.svg
diff --git a/doc/nrf/security/tfm.rst b/doc/nrf/security/tfm.rst
@@ -196,9 +196,23 @@ On nRF54L15 devices, TF-M uses the MPC to enforce the security policy between th
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+.. figure:: /images/nrf-secure-rom-granularity.svg
+   :alt: Partition alignment granularity
+   :width: 80%
+   :align: center
+
+   Partition alignment granularity on different nRF devices.
+
 When the :ref:`partition_manager` is enabled, it will take into consideration the alignment requirements.
 But when the static partitions are used, the user is responsible for following the alignment requirements.
 
+.. figure:: /images/secure-flash-regions.svg
+   :alt: Example of aligning partitions with flash regions
+   :width: 80%
+   :align: center
+
+   Example of aligning partitions with flash regions.
+
 If you are experiencing any partition alignment issues when using the Partition Manager, check the :ref:`known_issues` page on the main branch.
 
 The partitions which need to be aligned with the TrustZone flash region size are partitions ``tfm_nonsecure`` and ``nonsecure_storage``.