EMC1403 데이터 시트보기 (PDF) - Microchip Technology

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EMC1403

1°C Temperature Sensor with Beta Compensation

Microchip Technology 

1°C Temperature Sensor with Beta Compensation

Data Sheet

Chapter 4 System Management Bus Interface Protocol

4.1

.

System Management Bus Interface Protocol

The EMC1403 and EMC1404 communicate with a host controller, such as an SIO, through the SMBus.

The SMBus is a two-wire serial communication protocol between a computer host and its peripheral

devices. A detailed timing diagram is shown in Figure 4.1.

For the first 15ms after power-up the device may not respond to SMBus communications.

Figure 4.1 SMBus Timing Diagram

The EMC1403 and EMC1404 are SMBus 2.0 compatible and support Send Byte, Read Byte, Write

Byte, Receive Byte, and the Alert Response Address as valid protocols as shown below.

All of the below protocols use the convention in Table 4.1.

Table 4.1 Protocol Format

DATA SENT

TO DEVICE

# of bits sent

DATA SENT TO

THE HOST

# of bits sent

Attempting to communicate with the EMC1403 and EMC1404 SMBus interface with an invalid slave

address or invalid protocol will result in no response from the device and will not affect its register

contents. Stretching of the SMCLK signal is supported, provided other devices on the SMBus control

the timing.

DS20005272A-page 14

 2014 Microchip Technology Inc.

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