IT51XXX series

Overview

The IT51XXX 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 IT51526 development board (also known as it51xxx_evb/it51526aw) and its debug card.

IT51526 EVB

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

Hardware

The IT51XXX series contains different chip types(ex, it51526, it51527), and they support different hardware features. Listing the IT51526 hardware features as following:

  • RISC-V RV32IMC instruction set

  • 4KB instruction cache size

  • 128KB SRAM in total

  • Built-in 32.768 kHz clock generator

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

  • eSPI, SPI, BRAM, KBC, PECI, UART

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

  • Support 3 Voltage Comparator

  • Support Cryptographic Engine

  • 9 SMBus hosts, 3 targets, with 12 SMBus channels, compatible with I2C

  • I3C host: Support two I3C controllers, compliant with the MIPI I3C v1.0 SEPC.

  • Two-wire serial interface up to 12.5MHz using Push-Pull.

  • Support SDR, IBI, Hot-Join.

  • I3C target: Support SDR, FIFO co-use DLM. Support Push-Pull output.

Supported Features

The it51xxx_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.

Programming and debugging on it51526

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 it51xxx_evb to the evolution motherboard.

  3. Connect the Download Board J5 to J38(GPC1 & GPC2) on the evolution motherboard.

  4. Connect the USB to UART wire to UART0 connector on the evolution motherboard.

    it51xxx_evb wiring

    Note

    Be careful during connection! Use separate wires to connect I2C pins with pins on the it51xxx_evb board. Wiring connection is described in the table below.

    J5 Connector

    it51xxx_evb J38 Connector

    2

    C1

    3

    C2

    4

    GND

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

    USB to UART cable

    Evolution motherboard UART0 Connector

    USB

    UART0

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 it51xxx_evb/it51526aw 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 it51xxx/it51526aw board flash.

  1. Flashing steps as described in the link: Flashing steps [3].

  2. Turn on the it51xxx_evb/it51526aw board switch, you should see "Hello World! it51xxx_evb/it51526aw" 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/upload/2024_01_23/6_20240123162336wu55j1Rjm4.bz2

  3. Split first and second terminal windows to view both of them. You should see "Hello World! it51xxx_evb/it51526aw" in the first terminal window. If you don’t see this message, press the Reset button and the message should appear.

Debugging

it51xxx_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 it51xxx_evb board and try again.

References