EMC6D103 datasheet(13/89 Pages) SMSC

13 / 89 page

Fan Control Device with High Frequency PWM Support and Hardware Monitoring Features

Datasheet

SMSC EMC6D103

Revision 0.4 (04-04-05)

DATASHEET

Note: The “#” as the suffix of a signal name indicates an “Active Low” signal.

Note 3.1

Buffer types per function on multiplexed pins are separated by a slash “/”. Buffer types in

parenthesis represent multiple buffer types for a single pin function.

Note 3.2

This analog input is backdrive protected.

3.2

Buffer Type Description

Note: The buffer type values are specified at VCC=3.3V

TACH1

Input for monitoring a fan tachometer input.

VCC

TACH2

Input for monitoring a fan tachometer input.

VCC

TACH3

/INT#

Input for monitoring a fan tachometer input.

/Interrupt output to indicate a thermal

and/or voltage event.

IMOD3

IM /OD3

VCC

TACH4

/Address

Select

Input for monitoring a fan tachometer input.

If in Address Select Mode, determines the

SMBus address of the device.

VCC

PWM1

/xTest Out

PWM Output 1 controlling speed of fan.

When in XOR tree test mode, functions as

XOR Tree output.

OD8/O8

VCC

PWM2

/INT#

PWM Output 2 controlling speed of fan.

/Interrupt output to indicate a thermal

and/or voltage event.

OD8

OD8/OD8

VCC

PWM3

/Address

Enable#

PWM Output 3 controlling speed of fan.

If pulled to ground at power on, enables

Address Select Mode (Address Select pin

controls SMBus address of the device).

IOD8

OD8/I

VCC

Positive Power Supply. Nominal 3.3V.

VCC is monitored by the Hardware

Monitoring Block.

(Can be powered by +3.3V Standby power

if monitoring in low power states is

required.)

VSS

Analog Ground.

Table 3.2 Buffer Type Descriptions

BUFFER TYPE

DESCRIPTION

Digital Input

IAN

Analog Input, Hardware Monitoring Block.

IMOD3

Input/Output (Open Drain), 3mA sink.

Output, 8mA sink, 4mA source.

OD8

Output (Open Drain), 8mA sink.

IO8

Input/Output, 8mA sink, 4mA source.

Table 3.1 Pin Description (continued)

PIN #

NAME

FUNCTION

BUFFER

TYPE

BUFFER

REQUIREMENT

PER FUNCTION

(Note 3.1)

POWER

WELL

NOTES

HARDWARE MONITORING BLOCK (24)

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