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 it515xx_evb) and its debug card.

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 it515xx_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.

`it515xx_evb/it51526aw` target

Type	Location	Description	Compatible
CPU	on-chip	ITE IT8XXX2 RISC-V CPU1	`ite,riscv-ite`
Clock control	on-chip	ITE it51xxx ECPM (EC Clock and Power Management Controller) node1	`ite,it51xxx-ecpm`
Flash controller	on-chip	ITE IT8XXX2 flash memory1	`ite,it8xxx2-flash-controller`
GPIO & Headers	on-chip	This binding gives a base representation of the it51xxx series gpio14	`ite,it51xxx-gpio`
Input	on-chip	ITE it51xxx keyboard matrix controller1	`ite,it51xxx-kbd`
Interrupt controller	on-chip	ITE Wake-Up Controller (WUC) mapping child node1	`ite,it51xxx-wuc-map`
	on-chip	ITE Wake-Up Controller (WUC)16	`ite,it51xxx-wuc`
	on-chip	ITE Interrupt controller1	`ite,it51xxx-intc`
LED	on-board	Group of GPIO-controlled LEDs1	`gpio-leds`
Memory controller	on-chip	ITE IT8XXX2 Instruction Local Memory1	`ite,it8xxx2-ilm`
MTD	on-chip	Flash node1	`soc-nv-flash`
MTD	on-board	Fixed partitions of a flash (or other non-volatile storage) memory1	`fixed-partitions`
Pin control	on-chip	The ITE IT8XXX2 pin controller is a node responsible for controlling pin function selection and pin properties1	`ite,it8xxx2-pinctrl`
Pin control	on-chip	ITE IT8XXX2 Pin Controller14	`ite,it8xxx2-pinctrl-func`
Serial controller	on-chip	ns16550 UART1 1	`ns16550`
Serial controller	on-chip	ITE, IT51XXX-UART node1 1	`ite,it51xxx-uart`
SRAM	on-chip	Generic on-chip SRAM1	`mmio-sram`
Timer	on-chip	ITE it51xxx external timer1	`ite,it51xxx-timer`
Watchdog	on-chip	ITE watchdog timer1	`ite,it51xxx-watchdog`

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

Connect the Download Board to your host computer using the USB cable.
Connect the it515xx_evb to the evolution motherboard.
Connect the Download Board J5 to J38(GPC1 & GPC2) on the evolution motherboard.
Connect the USB to UART wire to UART0 connector on the evolution motherboard.

Note

Be careful during connection! Use separate wires to connect I2C pins with pins on the it515xx_evb board. Wiring connection is described in the table below.

J5 Connector

it515xx_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

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 it515xx_evb samples/hello_world

The file zephyr.bin will be created by west.

Flashing

Windows

Use the winflash tool to program a zephyr application to the it515xx board flash.

Flashing steps as described in the link: Flashing steps [3].
Turn on the it515xx_evb board switch, you should see "Hello World! it515xx_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 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
Split first and second terminal windows to view both of them. You should see "Hello World! it515xx_evb" in the first terminal window. If you don’t see this message, press the Reset button and the message should appear.

Debugging

it515xx_evb board can be debugged by connecting USB to UART. We can write commands and read messages through minicom in the Ubuntu terminal.

Troubleshooting

If the flash tool reports a failure, re-plug the 8390 Download board or power cycle the it515xx_evb board and try again.