IT8XXX2 series

Board Overview

IT8XXX2 series

Name:

it8xxx2_evb

Vendor:

ITE Tech. Inc.

Architecture:

riscv

SoC:

it81302bx

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Overview

The IT8XXX2 is a 32-bit RISC-V Micro-controller. And a highly integrated embedded controller with system functions. It is suitable for mobile system applications. The picture below is the IT81302 MECC board (also known as it8xxx2_evb) and its debug card.

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

Hardware

The IT8XXX2 series contains different chip types(ex, it81302, it83202), and they support different hardware features. Listing the IT81302 hardware features as following:

• RISC-V RV32IMAFC instruction set

• 4KB instruction cache size

• 60KB SDRAM in total

• Built-in 32.768 kHz clock generator

• PWM, eSPI, LPC, FLASH, UART, GPIO, Timer, Watchdog, ADC, JTAG

• 6 SMBus channels, with 3 DMA controllers, compatible with I2C

• SPI master/slave

• USB Type-c CC Logic

• USB Power Delivery

• Support KB scan

Supported Features

The it8xxx2_evb board supports the hardware features listed below.

on-chip / on-board

Feature integrated in the SoC / present on the board.

2 / 2

Number of instances that are enabled / disabled.
Click on the label to see the first instance of this feature in the board/SoC DTS files.

vnd,foo

Compatible string for the Devicetree binding matching the feature.
Click on the link to view the binding documentation.

it8xxx2_evb/it81302bx target

Type	Location	Description	Compatible
CPU	on-chip	ITE IT8XXX2 RISC-V CPU1	ite,riscv-ite
ADC	on-chip	ITE it8xxx2 ADC1	ite,it8xxx2-adc
Cryptographic accelerator	on-chip	ITE IT8XXX2 Crypto SHA accelerator1	ite,it8xxx2-sha
ESPI	on-chip	ITE IT8XXX2 ESPI controller1	ite,it8xxx2-espi
Flash controller	on-chip	ITE IT8XXX2 flash memory1	ite,it8xxx2-flash-controller
GPIO & Headers	on-chip	ITE IT8xxx2 GPIO13	ite,it8xxx2-gpio
	on-chip	ITE IT8xxx2 Kscan Pins as GPIO3	ite,it8xxx2-gpiokscan
I2C	on-chip	ITE it8xxx2 I2C3	ite,it8xxx2-i2c
	on-chip	ITE enhance I2C3	ite,enhance-i2c
Input	on-chip	ITE it8xxx2 keyboard matrix controller1	ite,it8xxx2-kbd
Interrupt controller	on-chip	ITE Wake-Up Controller (WUC) mapping child node1	ite,it8xxx2-wuc-map
	on-chip	ITE Wake-Up Controller (WUC)16	ite,it8xxx2-wuc
	on-chip	ITE Interrupt controller1	ite,it8xxx2-intc
LED	on-board	Group of GPIO-controlled LEDs1	gpio-leds
Memory controller	on-chip	ITE, IT8XXX2 Battery Backed RAM node1	ite,it8xxx2-bbram
	on-chip	ITE IT8XXX2 Instruction Local Memory1	ite,it8xxx2-ilm
MTD	on-chip	Flash node1	soc-nv-flash
	on-board	Fixed partitions of a flash (or other non-volatile storage) memory1	fixed-partitions
PECI	on-chip	ITE it8xxx2 PECI1	ite,it8xxx2-peci
Pin control	on-chip	The ITE IT8XXX2 pin controller is a node responsible for controlling pin function selection and pin properties1	ite,it8xxx2-pinctrl
	on-chip	ITE IT8XXX2 Pin Controller16	ite,it8xxx2-pinctrl-func
PWM	on-chip	ITE, it8xxx2 PWM prescaler node1	ite,it8xxx2-pwmprs
	on-chip	ITE, it8xxx2 Pulse Width Modulator (PWM) node2 6	ite,it8xxx2-pwm
Sensors	on-chip	ITE, it8xxx2 Voltage Comparator node1 5	ite,it8xxx2-vcmp
Serial controller	on-chip	ns16550 UART2	ns16550
	on-chip	ITE, IT8XXX2-UART node2	ite,it8xxx2-uart
SHI	on-chip	ITE, IT8XXX2 Serial Host Interface (SHI) node1	ite,it8xxx2-shi
SPI	on-chip	IT8XXX2 SPI1	ite,it8xxx2-spi
SRAM	on-chip	Generic on-chip SRAM description1	mmio-sram
Tachometer	on-chip	ITE, it8xxx2 Tachometer node1 1	ite,it8xxx2-tach
Timer	on-chip	ITE Ext-timer1	ite,it8xxx2-timer
USB Type-C	on-chip	ITE it8xxx2 USB-C Power Delivery port2	ite,it8xxx2-usbpd
Watchdog	on-chip	ITE watchdog timer1	ite,it8xxx2-watchdog

Hardware reworks

Before using the it8xxx2_evb, some hardware rework is needed. The HW rework guide can be found in ITE’s website. https://www.ite.com.tw/upload/2024_01_15/6_20240115100309cgdjgcLzX3.pdf

Programming and debugging on it83202

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 it8xxx2_evb to your host computer or a 5V1A USB power supply.

3. Connect the Download Board J5 to J8 on the it8xxx2_evb board.

4. Connect the USB to UART wire to it8xxx2_evb.

   

   Note

   Be careful during connection! Use separate wires to connect I2C pins with pins on the it8xxx2_evb board. Wiring connection is described in the table below.

   J5 Connector	it8xxx2_evb J8 Connector
   2	1
   3	3
   4	5

   For USB to UART cable, connect the it8xxx2_evb as below:

   USB to UART cable	it8xxx2_evb J5 Connector
   RX	J5.3
   TX	J5.4
   GND	eSPI Debug.10

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 it8xxx2_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 it8xxx2 board flash.

1. Open winflash tool and make sure the order you open the switch is right. Fisrt, turn on the Download board switch. Second, turn on the it8xxx2_evb board switch. Then, configure your winflash tool like below.

   

   

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

   

3. At this point, you have flashed your image into ITE board and it will work if you turn on 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).

   

4. Turn on the it8xxx2_evb board switch, you should see "Hello World! it8xxx2_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 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/upload/2024_01_23/6_20240123162336wu55j1Rjm4.bz2

3. Split first and second terminal windows to view both of them. You should see "Hello World! it8xxx2_evb" in the first terminal window. If you don’t see this message, press the Reset button and the message should appear.

Debugging

Supporting uart debug, currently.

Troubleshooting

1. If the flash tool reports a failure, re-plug the 8390 Download board or power cycle the it8xxx2_evb board and try again.

References

[1] (1,2)

https://www.ite.com.tw/en/product/cate2/IT81202

[2]

https://docs.zephyrproject.org/latest/getting_started/index.html