Power and Reset Buttons
=======================

The phyCORE-AM62x development kit provides a selection of buttons to perform power related functions. To learn more information about the phyCORE-AM62x reset interfaces, please see section 5.3 in the `Hardware Manual <https://www.phytec.com/product/phycore-am62x/#section-hardware-documentation>`_.

.. image:: ../../images/phycore-am62x/pb-07124_power-reset-btns.webp
   :width: 800px
   :alt: phyCORE-AM62x Power and Reset Buttons


.. list-table::
   :header-rows: 1
   :class: wrap-table

   * - Button
     - Function
     - Description
   * - S3
     - **Cold Reset**

       * MCU Domain Cold Reset
     - Only resets the MCU power rails by asserting X_nRESET_IN, which pulls down MCU_PORZ—the cold reset signal for the MCU Domain.

       Per the AM625 datasheet, there is no dedicated cold reset signal for the Main domain.
   * - S4
     - **Warm Reset**

       * MCU and Main Domain Warm Reset
     - Initiates a warm reset of both the MCU and Main domains by asserting the X_MCU_RESET (MCU Domain warm reset) and X_RESET_REQz (Main Domain external warm reset request).

       In many cases, this mechanism is sufficient to recover from system hangs while keeping power rails active. A warm reset requests that the SoC reboots while maintaining power rails on.
   * - S9
     - **System Controller**

       * Hard power down with long press
       * Power up if system powered down
     - Cold resets the Main domain on our carrier board.

       Our design toggles the PMIC enable signal to fully power down and reset the system, including all power rails via this control system button.