ITE IT8XXX2 series
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.
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
currently supports the following hardware features:
Interface |
Controller |
Driver/Component |
|---|---|---|
NVIC |
on-chip |
interrupt controller |
TIMER |
on-chip |
timer |
UART |
on-chip |
serial |
GPIO |
on-chip |
gpio |
ADC |
on-chip |
adc |
I2C |
on-chip |
i2c |
KSCAN |
on-chip |
kscan |
Other hardware features are not currently supported by Zephyr.
The default configuration can be found in the boards/riscv/it8xxx2_evb/it8xxx2_evb_defconfig Kconfig file.
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
Connect your Download Board to your host computer using the USB cable.
Connect your Download Board to J145 on the it8xxx2_evb board.
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 J145 Connector
2
7
3
9
4
10
Connect UART0 port of the it8xxx2_evb board to your host computer using the usb cable.
Note
Be careful during connection! Use separate wires to connect USB serial with pins on the it8xxx2_evb board. Wiring connection is described in the table below.
USB Connector
it8xxx2_evb Connector
TX
UART0 5
RX
UART0 7
GND
J15
Apply power to the board via a USB cable.
Building
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
The file
zephyr.binwill be created by west.
Flashing
Windows
Use the winflash tool to program a zephyr application to the it8xxx2 board flash.
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.
Using winflash tool flash zephyr.bin into your ITE board. First, click
Loadbutton and select your zephyr.bin file. Second, clickrunto flash the iamge into board.
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).
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
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
Open a second terminal window and use linux flash tool to flash your board. You can find more details about tool usage from its document.
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
If the flash tool reports a failure, re-plug the 8390 Download board or power cycle the it8xxx2_evb board and try again.