.. zephyr:board:: imx91_qsb

Overview

The i.MX 91 Quick Start Board (MCIMX91-QSB board) is a platform designed to display the most commonly used features of the i.MX 91 Application Processor. The MCIMX91-QSB board is an entry-level development board with a small and low-cost package. The board can be used by developers to get familiar with the processor before investing a large amount of resources in more specific designs.

Hardware

• i.MX 91 Application Processor

  • The processor integrates an Arm Cortex-A55 core that can operate at speeds of up to 1.4 GHz.

• RAM: 1GB LPDDR4

• Storage:

  • SanDisk 16GB eMMC5.1
  • microSD Socket

• Wireless:

  • Murata Type-2EL (SDIO+UART+SPI) module. It is based on NXP IW612 SoC, which supports dual-band (2.4 GHz /5 GHz) 1x1 Wi-Fi 6, Bluetooth 5.2, and 802.15.4

• USB:

  • Two USB 2.0 Type C connectors

• Ethernet:

  • ENET_QoS: 10/100/1000 Mbit/s RGMII Ethernet supporting TSN connected with external PHY RTL8211

• PCIe:

  • One M.2/NGFF Key E mini card 75-pin connector

• Connectors:

  • 40-Pin Dual Row Header

• LEDs:

  • 1x Power status LED
  • 2x UART LED

• Debug:

  • JTAG 20-pin connector
  • MicroUSB for UART debug

Supported Features

.. zephyr:board-supported-hw::

Devices

System Clock

This board configuration uses a system clock frequency of 24 MHz. Cortex-A55 Core runs up to 1.4 GHz.

Serial Port

This board configuration uses a single serial communication channel with the CPU's UART1 for A55 core.

Programming and Debugging

U-Boot "go" command is used to load and kick Zephyr to Cortex-A55 Core.

Stop the board at U-Boot command line, then need to download Zephyr binary image into DDR memory, it can use tftp:

.. code-block:: console

tftp 0x80000000 zephyr.bin

Or copy the Zephyr image zephyr.bin to SD card and plug the card into the board, for example if copy the image to the FAT partition of the SD card, use the following U-Boot command to load the image into DDR memory (assuming the SD card is dev 1, fat partition ID is 1, they could be changed based on actual partitions):

.. code-block:: console

fatload mmc 1:1 0x80000000 zephyr.bin;

Then use U-Boot to load and kick zephyr.bin to Cortex-A55 Core:

.. code-block:: console

dcache off; icache flush; go 0x80000000

Use this configuration to run basic Zephyr applications and kernel tests, for example, with the :zephyr:code-sample:synchronization sample:

.. zephyr-app-commands:: :zephyr-app: samples/synchronization :host-os: unix :board: imx91_qsb/mimx9111 :goals: build

This will build an image with the synchronization sample app, boot it and display the following console output:

.. code-block:: console

*** Booting Zephyr OS build v4.0.0-3277-g69f43115c9a8 ***
thread_a: Hello World from cpu 0 on imx91_qsb!
thread_b: Hello World from cpu 0 on imx91_qsb!
thread_a: Hello World from cpu 0 on imx91_qsb!
thread_b: Hello World from cpu 0 on imx91_qsb!

.. include:: ../../common/board-footer.rst.inc