DIO1411

Version 1.0, Jul 2024

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© 2024 DIOO MICROCIRCUITS CO., LTD.

9

10.Application Information

Important notice: Validation and testing are the most reliable ways to confirm system functionality. The

application information is not part of the specification and is for reference purpose only.

A host device can perform thermal management using DIO1411. The DIO1411 can directly measure the

temperature of the internal BJT. The

_____

ALERT and

______

THERM/ADDR pins can be asserted to achieve two levels of

overtemperature alarm. Typical application diagrams for the chip is shown in Figure 3.

Figure 3. System design for DIO1411

11. Communication Protocol and SMBus Protocol

11.1. Communication protocol

Through the SMBus (or I2C), the DIO1411 can communicate with the host controller. The SMBus is a two-wire

serial communication protocol between a computer host and its peripheral devices. The details can be found in

Figure 1.

11.1.1. SMBus address and RD/

——

WR bit

The SMBus address byte consists of the 7-bit client address followed by the RD/

——

WR indicator bit. To the client

device, the RD/

——

WR bit can be either writing or reading date.

When the RD/

——

WR bit is a logic ‘0’, the SMBus host is writing data. When the RD/

——

WR bit is a logic ‘1’, the SMBus

host is reading data.

The DIO1411 SMBus slave address is determined by the pull-up resistor on the

______

THERM/ADDR pin as shown in

table 3 in section 9.6 "Programming SMBus (or I2C) Address".

11.1.2. SMBus data bytes

All SMBus data bytes are composed of 8-bits of information and sent in order of priority, which means they are

sent most significant bit at first.