EMC6D103 datasheet(62/92 Pages) SMSC

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

Datasheet

Revision 0.3 (03-01-07)

SMSC EMC6D103

DATASHEET

8.2.11

Note 8.10 This register is cleared on a read if no events are active.

This register is read only – a write to this register has no effect.

The Interrupt Status Register 2 bits is automatically set by the device whenever a remote temperature

sensor error occurs, a tach reading value is above the minimum value set in the tachometer minimum

registers, or whenever the 12V input voltage violates the limits set in the limit and parameter registers.

The Interrupt Status Register 2 register holds a set bit until the event is read by software or until the

individual interrupt enable bit is cleared.

This register holds a bit set until the event is read by software or until the individual enable bit is

cleared (see Note below). The contents of this register are cleared (set to 0) automatically by the

EMC6D103 after it is read by software, if the voltage no longer violate the limits set in the limit and

parameter registers, if the temperature sensor error no loner exists, or if the tach reading register is

no longer above the minimum. Once set, the Interrupt Status Register 2 bits remain set until a read

event occurs or until the individual interrupt enable bit is cleared, even if the voltage, Tach, or diode

event no longer exists.

Table 8.16 Interrupt Status Register 1

BIT

NAME

R/W DEFAULT

DESCRIPTION

2.5V_Error

The EMC6D103 automatically sets this bit to 1 when the 2.5V input

voltage is less than or equal to the limit set in the 2.5V Low Limit register

or greater than the limit set in the 2.5V High Limit register.

Vccp_Error

The EMC6D103 automatically sets this bit to 1 when the Vccp input

voltage is less than or equal to the limit set in the Vccp Low Limit register

or greater than the limit set in the Vccp High Limit register.

VCC_Error

The EMC6D103 automatically sets this bit to 1 when the VCC input

voltage is less than or equal to the limit set in the VCC Low Limit register

or greater than the limit set in the VCC High Limit register.

5V_Error

The EMC6D103 automatically sets this bit to 1 when the 5V input voltage

is less than or equal to the limit set in the 5V Low Limit register or greater

than the limit set in the 5V High Limit register.

Remote

Diode 1 Limit

Error

The EMC6D103 automatically sets this bit to 1 when the temperature

input measured by the Remote1- and Remote1+ is less than or equal to

the limit set in the Remote Diode 1 Low Temp register or greater than the

limit set in Remote Diode 1 High Temp register.

Internal

Sensor Limit

Error

The EMC6D103 automatically sets this bit to 1 when the temperature

input measured by the internal temperature sensor is less than or equal

to the limit set in the Internal Low Temp register or greater than the limit

set in the Internal High Temp register.

Remote

Diode 2 Limit

Error

The EMC6D103 automatically sets this bit to 1 when the temperature

input measured by the Remote2- and Remote2+ is less than or equal to

the limit set in the Remote Diode 2 Low Temp register or greater than the

limit set in the Remote Diode 1 High Temp register.

INT2 Event

Active

The device automatically sets this bit to 1 when a status bit is set in the

Interrupt Status Register 2.

Table 8.17 Register 42h: Interrupt Status Register 2

Address

Read/

Write

Bit 7

(MSb)

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

(LSb)

Default

Value

42h

R-C

(See

Note

8.10)

Interrupt Status Register 2

ERR2

ERR1

TACH4

TACH3

TACH2

TACH1

RES

12V

00h

EMC6D103 Datasheet(PDF) 62 Page - SMSC Corporation

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