This is the documentation for the latest (main) development branch of Zephyr. If you are looking for the documentation of previous releases, use the drop-down menu on the left and select the desired version.

Alder Lake N


Alder Lake processor is a 64-bit multi-core processor built on 10-nanometer technology process.

Currently supported is N-processor line, Single Chip Platform that consists of the Processor Die and Alder Lake N Platform Controller Hub (ADL-N PCH) Die on the same package as Multi-Chip Package (MCP).

Proposed branding for Adler Lake N is Intel Processor (N100,N200) and Intel Core i3 (N300, N305).

Alder Lake N Customer Reference Board (ADL-N CRB) and Alder Lake Reference Validation Platform (ADL-N RVP) are example implementations of compact single board computer with high performance for IoT edge devices.

This board configuration enables kernel support for the Alder Lake N boards.


General information about the board can be found at the INTEL_ADL website.

Connections and IOs

Refer to the INTEL_ADL website for more information.

Programming and Debugging

Use the following procedures for booting an image for an Alder Lake N CRB board.

Build Zephyr application

  1. Build a Zephyr application; for instance, to build the hello_world application for Alder Lake N CRB:

    # From the root of the zephyr repository
    west build -b intel_adl_crb samples/hello_world


    A Zephyr EFI image file named zephyr.efi is automatically created in the build directory after the application is built.

Booting the Alder Lake N CRB Board using UEFI

Preparing the Boot Device

Prepare a USB flash drive to boot the Zephyr application image on a board.

  1. Format the USB flash drive as FAT32.

    On Windows, open File Explorer, and right-click on the USB flash drive. Select Format.... Make sure in File System, FAT32 is selected. Click on the Format button and wait for it to finish.

    On Linux, graphical utilities such as gparted can be used to format the USB flash drive as FAT32. Alternatively, under terminal, find out the corresponding device node for the USB flash drive (for example, /dev/sdd). Execute the following command:

    $ mkfs.vfat -F 32 <device-node>


    Make sure the device node is the actual device node for the USB flash drive. Or else you may erase other storage devices on your system, and will render the system unusable afterwards.

  2. Copy the Zephyr EFI image file zephyr/zephyr.efi to the USB drive.

Booting Zephyr on a board

Boot the board to the EFI shell with USB flash drive connected.

  1. Insert the prepared boot device (USB flash drive) into the board.

  2. Connect the board to the host system using the serial cable and configure your host system to watch for serial data. See board’s website for more information.


    Use a baud rate of 115200.

  3. Power on the board.

  4. When the following output appears, press F7:

    Press <DEL> or <ESC> to enter setup.
  5. From the menu that appears, select the menu entry that describes that particular EFI shell.

  6. From the EFI shell select Zephyr EFI image to boot.

    Shell> fs0:zephyr.efi
  7. When the boot process completes, you have finished booting the Zephyr application image.