doc/nrf/../device_guides/nrf54l: UICR.OTP maping

Added page on OTP mapping used by NCS.

Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>
Signed-off-by: Anna Wojdylo <anna.wojdylo@nordicsemi.no>

Author: nvlsianpu

doc/nrf/app_dev/device_guides/nrf54l/index.rst

@@ -86,3 +86,4 @@ This self-paced course introduces the hardware architecture, functionality, capa
    kmu_provision
    dfu_config
    ecies_x25519.rst
+   otp_map_nrf54l

doc/nrf/app_dev/device_guides/nrf54l/otp_map_nrf54l.rst

@@ -0,0 +1,35 @@
+.. _ug_nrf54l_otp_map:
+
+nRF54L One-Time Programmable memory map for |NCS|
+#################################################
+
+.. contents::
+   :local:
+   :depth: 2
+
+The nRF54L Series devices are equipped with emulated One-Time Programmable (OTP) memory, designed to store assets permanently and in a non-volatile format.
+This memory is a part of the User Information Configuration Register (UICR) memory space.
+It can only be programmed with non-0xFFFFFFFF values, and it is possible only once after an erase all operation.
+The OTP is organized into 4-byte words and is mapped as the ``UICR.OTP[]`` array.
+For details, refer to the :ref:`datasheet<ug_nrf54l>` for the specific device model.
+
+The allocation of this memory is determined by the software, and the |NCS| reserves a part of it for its own usage.
+
+
+.. list-table:: OTP memory assignment map for nRF54L Series devices
+    :header-rows: 1
+    :align: center
+    :widths: auto
+
+    * - ``UICR.OTP[]`` range
+      - Size (4-byte words)
+      - Assignment
+      - Description
+    * - 0 - 287
+      - 288
+      - ``bl_storage`` space
+      - Used for bootloaders and secure firmware storage realization.
+    * - 288 - 319
+      - 32
+      - Custom usage
+      - Available for custom, user-defined purposes.