EMC1001_15 datasheet(8/24 Pages) MICROCHIP

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EMC1001

DS20005411A-page 8

 2015 Microchip Technology Inc.

4.0

PRODUCT DESCRIPTION

The EMC1001 is an SMBus temperature sensor that

monitors a single temperature zone. Thermal manage-

ment is performed in cooperation with a host device.

The host reads the temperature data from the

EMC1001 and takes appropriate action such as con-

trolling fan speed or processor clock frequency. The

EMC1001 has programmable temperature-limit regis-

ters that define a safe operating window. After the host

has configured the temperature limits, the EMC1001

can operate as a free-running independent watchdog

to warn the host of temperature hot-spots, without

requiring

the

host

poll

the

device.

The

ADDR/THERM output can be used to control a fan

without host intervention.

FIGURE 4-1:

Controlling a Fan without Host Intervention.

The EMC1001 has two basic modes of operation:

• Run Mode: In this mode, the EMC1001

continuously converts temperature data and

updates its registers. The rate of temperature

conversion is configured as shown in Section 4.9

“Conversion Rate Register”.

• Standby Mode: In this mode, the EMC1001 is

placed in Standby to conserve power, as

described in Section 4.5 “Standby Mode”.

ADDR/THERM

ALERT/THERM2

EMC1001

Host

Fan

Driver

SMDATA

Internal

Diode

SMCLK

SMBus

Interface

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