EMC2101-R-ACZL-TR datasheet(7/56 Pages) MICROCHIP

Part #	EMC2101-R-ACZL-TR

Description	SMBus Fan Control with 1°C Accurate Temperature Monitoring

PDF	56 Pages

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Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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DS20006703A-page 7

EMC2101

2.0

SYSTEM MANAGEMENT BUS

INTERFACE PROTOCOL

2.1

System Management Bus

Interface Protocol

The EMC2101 communicates with a host controller

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 2-1. Stretching of the SMCLK signal is

supported, however the EMC2101 does not stretch the

clock signal

The EMC2101 powers up as an SMBus client (after

loading from EEPROM as applicable).

FIGURE 2-1:

SMBus Timing Diagram.

The EMC2101 is SMBus 2.0 compatible and supports

Send Byte, Read Byte, Write Byte, Receive Byte and

the Alert Response Address as valid protocols, as

shown below.

All of the protocols below use the convention in

Table 2-1.

TABLE 2-1:

PROTOCOL FORMAT

Data Sent to Device

Data Sent to the Host

# of bits sent

EMC2101-R-ACZL-TR Datasheet(PDF) 7 Page - Microchip Technology