ITE IT82XX2 series

Overview

The IT82XX2 is a 32-bit RISC-V microcontroller. And a highly integrated embedded controller with system functions. It is suitable for mobile system applications. The picture below is the IT82202 development board (also known as it82xx2_evb) and its debug card.

IT82202 EVB

To find out more about ITE, visit our World Wide Web at:ITE’s website [1]

Hardware

The IT82XX2 series contains different chip types(ex, it82202, it82302), and they support different hardware features. Listing the IT82202 hardware features as following:

  • RISC-V RV32IMAFC instruction set

  • 4KB instruction cache size

  • 256KB SRAM in total

  • Built-in 32.768 kHz clock generator

  • Embedded Flash, 512K/1024K-byte e-flash

  • eSPI, SSPI, SPI slave, BRAM, KBC, PECI, UART

  • GPIO, PWM, ADC, INTC, WUC, Timer, Watchdog, KB scan, JTAG

  • Support 6 Voltage Comparator

  • Support Cryptographic Engine

  • 6 SMBus channels, with 6 DMA controller, compatible with I2C

  • USB 2.0 Full-speed Controller

  • USB Type-c CC Logic

  • USB Power Delivery

Supported Features

currently supports the following hardware features:

Supported Features

Interface

Controller

Driver/Component

NVIC

on-chip

interrupt controller

FLASH

on-chip

flash controller

PINCTRL

on-chip

pin controller

ESPI

on-chip

espi

PECI

on-chip

peci

UART

on-chip

serial

GPIO

on-chip

gpio

PWM

on-chip

pwm

ADC

on-chip

adc

TIMER

on-chip

timer

WATCHDOG

on-chip

watchdog

KSCAN

on-chip

kscan

SENSOR

on-chip

voltage comparator

I2C

on-chip

i2c

Other hardware features are not currently supported by Zephyr.

The default configuration can be found in the boards/riscv/it82xx2_evb/it82xx2_evb_defconfig Kconfig file.

Programming and debugging on it82202

In order to upload the application to the device, you’ll need our flash tool and Download board. You can get them at: ITE’s website [1].

Wiring

  1. Connect the Download Board to your host computer using the USB cable.

  2. Connect the it82xx2_evb to the evolution motherboard.

  3. Connect the Download Board J5 to J41 on the evolution motherboard.

  4. Connect the USB to UART wire to J33 on the evolution motherboard.

    it82xx2_evb wiring

    Note

    Be careful during connection! Use separate wires to connect I2C pins with pins on the it82xx2_evb board. Wiring connection is described in the table below.

    J5 Connector

    it82xx2_evb J41 Connector

    2

    E0

    3

    E7

    4

    GND

    For USB to UART cable, connect the evolution motherboard as below:

    USB to UART cable

    Evolution motherboard J33 Connector

    RX

    B0

    TX

    B1

    GND

    GND

Building

  1. Build Hello World application as you would normally do (see :Zephyr Getting Started Guide [2]):.

    # From the root of the zephyr repository
west build -b it82xx2_evb samples/hello_world

  2. The file zephyr.bin will be created by west.

Flashing

Windows

Use the winflash tool to program a zephyr application to the it82xx2 board flash.

  1. Open the winflash tool and make sure the order you open the switch is right. First, turn on the Download board switch. Second, turn on the it82xx2_evb board switch. Then, configure your winflash tool like below.

    ../../../../_images/WinFlashTool_P2.jpg
    ../../../../_images/WinFlashTool_P4.jpg

  2. Using the winflash tool flash zephyr.bin into your ITE board. First, click the Load button and select your zephyr.bin file. Second, click run to flash the image into board.

    ../../../../_images/WinFlashTool_P3.jpg

  3. At this point, you have flashed your image into ITE board and it will work if you turn on the ITE board. You can use a terminal program to verify flashing worked correctly.

    For example, open device manager to find the USB Serial Port(COM4) and use your terminal program to connect it(Speed: 115200).

    ../../../../_images/WinFlashTool_P1.jpg

  4. Turn on the it82xx2_evb board switch, you should see "Hello World! it82xx2_evb" sent by the board. If you don’t see this message, press the Reset button and the message should appear.

Ubuntu

  1. Run your favorite terminal program to listen for output. Under Linux the terminal should be /dev/ttyUSB0. Do not close it.

    For example:

    $ minicom -D /dev/ttyUSB0 -b 115200

  2. Open a second terminal window and use the Linux flash tool to flash your board.

    $ sudo ~/itetool/ite -f build/zephyr/zephyr.bin

    Note

    The source code of ITE tool can be downloaded here: https://www.ite.com.tw/uploads/product_download/itedlb4-linux-v106.tar.bz2

  3. Split first and second terminal windows to view both of them. You should see "Hello World! it82xx2_evb" in the first terminal window. If you don’t see this message, press the Reset button and the message should appear.

Debugging

it82xx2_evb board can be debugged by connecting USB to UART. We can write commands and read messages through minicom in the Ubuntu terminal.

Troubleshooting

  1. If the flash tool reports a failure, re-plug the 8390 Download board or power cycle the it82xx2_evb board and try again.

References