EMC6D102-CZC(2006) Ver la hoja de datos (PDF) - SMSC -> Microchip

Número de pieza

componentes Descripción

Lista de partido

EMC6D102-CZC
(Rev.:2006)

Fan Control Device with Hardware Monitoring and Acoustic Noise Reduction Features

SMSC -> Microchip 

Fan Control Device with Hardware Monitoring and Acoustic Noise Reduction Features

Datasheet

Chapter 4 SMBus Interface

4.1

The host processor communicates with the Fan Monitoring device through a series of read/write

registers via the SMBus interface. SMBus is a serial communication protocol between a computer host

and its peripheral devices.

Slave Address

The default Slave Address is 0101110b. If this address is desired, the designer should not ground the

Address Enable# pin and should not apply a strapping resistor to the Address Select pin.

If multiple devices are implemented in a system or another SMBus device requires address 0101110b,

TACH4 and PWM3 must be disabled. In this case, addressing is implemented as follows:

The board designer will apply a 10KΩ pull-down resistor to ground on the Address Enable# pin. Upon

power up, the EMC6D102 device will be placed into Address Enable mode and assign itself an SMBus

address according to the Address Select input. The device will latch the address during the first valid

SMBus transaction in which the first five bits of the targeted address match those of the EMC6D102

address. This feature eliminates the possibility of a glitch on the SMBus interfering with address

selection.

ADDRESS

ENABLE#

1

0

0

Table 4.1 SMBus Slave Address Options

ADDRESS

SELECT

BOARD IMPLEMENTATION

X

Address Enable# pulled to VCC through resistor

Note: Resistor value will be dependent on PWM

circuit implemented.

0

Address Enable# pulled to ground through 10kΩ

resistor

Address Select Pulled to ground through a 10kΩ

resistor

1

Address Enable# pulled to ground through 10kΩ

resistor

Address Select pulled to VCC through a 10kΩ

resistor

SMBUS ADDRESS [7:1]

0101 110b

(default)

0101 100b

0101 101b

In this way, there can be up to three EMC6D102 devices on the SMBus at any time. Multiple

EMC6D102 devices can be used to monitor additional processors and temperature zones.

SMSC EMC6D102

13

DATASHEET

Revision 0.4 (06-15-06)

Share Link: