TC664 datasheet(14/36 Pages) MICROCHIP

14 / 36 page

TC664/TC665

DS21737A-page 14

 2002 Microchip Technology Inc.

their default power up states. The Configuration Regis-

ter and the FAN_FAULT Register maintain the states

they were in prior to the device being put into the shut-

down mode. Since these are the registers which control

the parts operation, the part does not have to be repro-

grammed for operation when it comes out of shutdown

mode.

4.10

SMBus Interface (SCLK & SDA)

The TC664/TC665 feature an industry standard, 2-wire

serial interface with factory-set addresses. By commu-

nicating with the TC664/TC665 device's registers,

functions like PWM duty cycle, low power shutdown

mode and fan RPM threshold can be controlled. Critical

information, such as fan fault, over temperature and fan

RPM, can also be obtained via the device data regis-

ters. The available data and control registers make the

TC664/TC665 devices very flexible and easy to use. All

of the available registers are detailed in Section 6.0.

4.11

SMBus Slave Address

The slave address of the TC664/TC665 devices is

0011 011

. This is a fixed address. This address is dif-

ferent from industry-standard digital temperature sen-

sors (like the TCN75) and, therefore, allows the TC664/

TC665 to be utilized in systems in conjunction with

these

components.

Please

contact

Microchip

Technology if alternate addresses are required.

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