i.MX95 EVK

Overview

The i.MX95 EVK (IMX95LPD5EVK-19) board is a platform designed to show the most commonly used features of the i.MX 95 automotive applications processor. It is an entry-level development board, which helps developers to get familiar with the processor before investing a large amount of resources in more specific designs. The i.MX95 device on the board comes in a compact 19 x 19 mm package.

Hardware

  • i.MX 95 automotive applications processor

    • The processor integrates up to six Arm Cortex-A55 cores, and supports functional safety with built-in Arm Cortex-M33 and -M7 cores

  • DRAM memory: 128-Gbit LPDDR5 DRAM

  • eMMC: 64 GB Micron eMMC

  • SPI NOR flash memory: 1 Gbit octal flash memory

  • USB interface: Two USB ports: Type-A and Type-C

  • Audio codec interface

    • One audio codec WM8962BECSN/R with one TX and RX lane

    • One 3.5 mm 4-pole CTIA standard audio jack

    • One 4-pin connector to connect speaker

  • Ethernet interface

    • ENET2 controller

      • Connects to a 60-pin Ethernet connector

      • Supports Ethernet PHY daughter cards that can be configured to operate at 100 Mbit/s or 1000 Mbit/s

    • ENET1 controller

      • Supports 100 Mbit/s or 1000 Mbit/s RGMII Ethernet with one RJ45 connector connected with an external PHY, RTL8211

    • 10 Gbit Ethernet controller

      • Supports XFI and USXGMII interfaces with one 10 Gbit RJ45 ICM connected with an external PHY, Marvell AQR113C

  • M.2 interface: One Wi-Fi/Bluetooth Murata Type-2EL module based on NXP AW693 chip supporting 2x2 Wi-Fi 6 and Bluetooth 5.2

  • MIPI CSI interface: Connects to one 36-pin miniSAS connector using x4 lane configuration

  • MIPI CSIDSI interface: Connects to one 36-pin miniSAS connector using x4 lane configuration

  • LVDS interface: two mini-SAS connectors each with x4-lane configuration

  • CAN interface: Two 4-pin CAN headers for external connection

  • SD card interface: one 4-bit SD3.0 microSD card

  • I2C interface: I2C1 to I2C7 controllers

  • FT4232H I2C interface: PCT2075 temperature sensor and current monitoring devices

  • DMIC interface: two digital microphones (DMIC) providing a single-bit PDM output

  • ADC interface: two 4-channel ADC header

  • Audio board interface

    • Supports PCIe x4 slot for Quantum board connection

    • Supports PCIe x8 slot for Audio I/O board connection

  • Debug interface

    • One USB-to-UART/MPSSE device, FT4232H

    • One USB 2.0 Type-C connector (J31) for FT4232H provides quad serial ports

Supported Features

The Zephyr imx95_evk/mimx9596/m7 board target supports the following hardware features:

Interface

Controller

Driver/Component

NVIC

on-chip

interrupt controller

SYSTICK

on-chip

systick

CLOCK

on-chip

clock_control

PINMUX

on-chip

pinmux

UART

on-chip

serial port

I2C

on-chip

i2c

TPM

on-chip

tpm

The Zephyr imx95_evk/mimx9596/a55 and imx95_evk/mimx9596/a55/smp board targets support the following hardware features:

Interface

Controller

Driver/Component

GIC-v4

on-chip

interrupt controller

ARM TIMER

on-chip

system clock

CLOCK

on-chip

clock_control

PINMUX

on-chip

pinmux

UART

on-chip

serial port

System Clock

This board configuration uses a system clock frequency of 24 MHz for Cortex-A55. Cortex-A55 Core runs up to 1.8 GHz. Cortex-M7 Core runs up to 800MHz in which SYSTICK runs on same frequency.

Serial Port

This board configuration uses a single serial communication channel with the CPU’s UART1 for Cortex-A55, UART3 for Cortex-M7.

TPM

Two channels are enabled on TPM2 for PWM for M7. Signals can be observerd with oscilloscope. Channel 2 signal routed to resistance R881. Channel 3 signal routed to resistance R882.

Programming and Debugging (A55)

Use this configuration to run basic Zephyr applications and kernel tests, for example, with the Basic Synchronization sample:

  1. Build and run the Non-SMP application

# From the root of the zephyr repository
west build -b imx95_evk/mimx9596/a55 samples/synchronization

This will build an image (zephyr.bin) with the synchronization sample app.

Copy the compiled zephyr.bin to the first FAT partition of the SD card and plug the SD card into the board. Power it up and stop the u-boot execution at prompt.

Use U-Boot to load and kick zephyr.bin to Cortex-A55 Core1:

fatload mmc 1:1 0xd0000000 zephyr.bin; dcache flush; icache flush; cpu 1 release 0xd0000000

Or use the following command to kick zephyr.bin to Cortex-A55 Core0:

fatload mmc 1:1 0xd0000000 zephyr.bin; dcache flush; icache flush; go 0xd0000000

It will display the following console output:

*** Booting Zephyr OS build v3.6.0-4569-g483c01ca11a7 ***
thread_a: Hello World from cpu 0 on imx95_evk!
thread_b: Hello World from cpu 0 on imx95_evk!
thread_a: Hello World from cpu 0 on imx95_evk!
thread_b: Hello World from cpu 0 on imx95_evk!
thread_a: Hello World from cpu 0 on imx95_evk!

  1. Build and run the SMP application

# From the root of the zephyr repository
west build -b imx95_evk/mimx9596/a55/smp samples/synchronization

This will build an image (zephyr.bin) with the synchronization sample app.

Copy the compiled zephyr.bin to the first FAT partition of the SD card and plug the SD card into the board. Power it up and stop the u-boot execution at prompt.

Use the following command to kick zephyr.bin to Cortex-A55 Core0:

fatload mmc 1:1 0xd0000000 zephyr.bin; dcache flush; icache flush; go 0xd0000000

It will display the following console output: .. code-block:: console

* Booting Zephyr OS build v3.7.0-rc3-15-g2f0beaea144a * Secondary CPU core 1 (MPID:0x100) is up Secondary CPU core 2 (MPID:0x200) is up Secondary CPU core 3 (MPID:0x300) is up Secondary CPU core 4 (MPID:0x400) is up Secondary CPU core 5 (MPID:0x500) is up thread_a: Hello World from cpu 0 on imx95_evk! thread_b: Hello World from cpu 4 on imx95_evk! thread_a: Hello World from cpu 0 on imx95_evk! thread_b: Hello World from cpu 3 on imx95_evk! thread_a: Hello World from cpu 0 on imx95_evk! thread_b: Hello World from cpu 1 on imx95_evk! thread_a: Hello World from cpu 0 on imx95_evk! thread_b: Hello World from cpu 5 on imx95_evk! thread_a: Hello World from cpu 0 on imx95_evk! thread_b: Hello World from cpu 2 on imx95_evk!

Programming and Debugging (M7)

The i.MX System Manager (SM) is used on i.MX95, which is an application that runs on Cortex-M33 processor. The Cortex-M33 is the boot core, runs the boot ROM which loads the SM (and other boot code), and then branches to the SM. The SM then configures some aspects of the hardware such as isolation mechanisms and then starts other cores in the system. After starting these cores, it enters a service mode where it provides access to clocking, power, sensor, and pin control via a client RPC API based on ARM’s System Control and Management Interface (SCMI).

To program M7, an i.MX container image flash.bin must be made, which contains multiple elements required, like ELE+V2X firmware, System Manager, TCM OEI, Cortex-M7 image and so on.

The steps making flash.bin and programming should refer to Getting Started with MCUXpresso SDK for IMX95LPD5EVK-19.pdf in i.MX95 MCUX SDK release. Note that for the DDR variant, one should use the Makefile targets containing the ddr keyword.

See 4.2 Run an example application, just rename zephyr.bin to m7_image.bin to make flash.bin and program to SD/eMMC.

Zephyr supports two M7-based i.MX95 boards: imx95_evk/mimx9596/m7 and imx95_evk/mimx9596/m7/ddr. The main difference between them is the memory used. imx95_evk/mimx9596/m7 uses TCM (ITCM for code and, generally, read-only data and DTCM for R/W data), while imx95_evk/mimx9596/m7/ddr uses DDR.

  1. Building the Hello World application for the TCM-based board

# From the root of the zephyr repository
west build -b imx95_evk/mimx9596/m7 samples/hello_world

  1. Building the Hello World application for the DDR-based board

# From the root of the zephyr repository
west build -b imx95_evk/mimx9596/m7/ddr samples/hello_world

After making flash.bin and program to SD/eMMC, open a serial terminal, and reset the board. For the imx95_evk/mimx9596/m7 board you should see something like:

*** Booting Zephyr OS build v3.6.0-4569-g483c01ca11a7 ***
Hello World! imx95_evk/mimx9596/m7

while, for the imx95_evk/mimx9596/m7/ddr board, you should get the following output:

*** Booting Zephyr OS build v3.6.0-4569-g483c01ca11a7 ***
Hello World! imx95_evk/mimx9596/m7/ddr

References

More information can refer to NXP official website: NXP website.