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Copy file name to clipboardExpand all lines: doc/nrf/app_dev/device_guides/working_with_nrf/nrf54h/ug_nrf54h20_architecture_reset.rst
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@@ -48,6 +48,10 @@ The following is the reset behavior when the LCS of the nRF54H20 SoC is in the `
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The register used is ``RESET`` (address offset: ``0x00``).
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* - ``RESET_PIN``
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- J-Link toggles the **RESET** pin via OBD.
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* - ``RESET_VIA_SECDOM``
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- Not supported.
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* - ``RESET_DEFAULT``
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- Selects ``RESET_HARD``.
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Reset types in LCS ROT or DEPLOYED
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-----------------------------------
@@ -60,16 +64,23 @@ The following is the reset behavior when the LCS of the nRF54H20 SoC is either i
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* - Reset kind in LCS ``ROT`` or ``DEPLOYED``
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- Reset behavior
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* - ``RESET_SYSTEM``
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- In the Secure Domain, this reset is mapped to the ``SYS_RESET_REQUEST`` bit, as described in the ARM specification for the *Application Interrupt and Register Controller*.
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This reset triggers a reset of the Secure Domain, which subsequently resets the entire system.
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In the local domains, this reset is available only if the other domains have a valid configuration in the ``CPUCONF`` register and their access port is unprotected.
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The PC tool uses the CTRL-AP mailbox to send a local domain reset request to the Secure Domain Firmware (SDFW).
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- Not supported.
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* - ``RESET_HARD``
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- Initiates a reset using the CTRL-AP through the On-Board Debugger (OBD).
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The register used is ``RESET`` (address offset: ``0x00``).
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* - ``RESET_PIN``
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- J-Link toggles the ``RESET`` pin via OBD.
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* - ``RESET_VIA_SECDOM``
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- Uses the CTRL-AP mailbox to send a local domain reset request to the Secure Domain Firmware (SDFW).
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SDFW resets nonessential local domains and global peripherals owned by these domains.
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Nonessential domains include all local domains except the Secure Domain.
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Only domains with a populated UICR are reset.
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After the reset, the affected CPUs do not restart.
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