Data Sheet

HUSB251

©2023 Hynetek Semiconductor Co., Ltd. All rights reserved.

Page 15 of 21

I2C FUNCTION

The HUSB251 implements a Fast-mode I2C interface. This I2C can be using as master or slave just setting by

firmware.

When configure GPIO as the I2C, GPIO4 as SCL and GPIO5 as SDA. It can detect the status of the input signals and

drive the I2C bus when needed

SCL/SDA_IN

VREF

SDA/SCL_PD/Output

3.3V

4.7K

GPIO4/5

Device

Figure 6. I2C Connection Diagram

SLEEP MODE

The HUSB251 supports deep sleep mode, and customizable sleep time. The current of VIN is not more than 1.5 mA

on toggling as the DRP, when configured the appropriate sleep timer.