LM96080

SNAS465D – SEPTEMBER 2009 – REVISED MARCH 2013

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Address Pointer Index (A7–A0)

Power On Value of Registers:

Registers and RAM

A7–A0 in Hex

<7:0> in Binary

Configuration Register

00h

0000 1000

Interrupt Status Register 1

01h

0000 0000

Interrupt Status Register 2

02h

0000 0000

Interrupt Mask Register 1

03h

0000 0000

Interrupt Mask Register 2

04h

0000 0000

Fan Divisor/RST_OUT/OS

05h

0001 0100

OS Configuration/Temperature Resolution

06h

0000 0001

Register

Conversion Rate Register

07h

0000 0000

Channel Disable Register

08h

0000 0000

Value RAM

20h – 3Fh

Register 3Eh defaults to 0000 0001

Register 3Fh defaults to 0000 1000

Configuration Register—Address 00h

Power on default <7:0> = 00001000 binary

Bit

Name

Read/Write

Description

0

Start

Read/Write

A one enables startup of monitoring operations, a zero puts the part in shutdown mode.

Note: Unlike the "INT_Clear" bit, the outputs of Interrupt pins will not be cleared if the user writes a

zero to this location after an interrupt has occurred. At startup, limit checking functions and scanning

begin. Note, all limits should be set in the Value RAM before setting this bit HIGH.

1

INT Enable

Read/Write

A one enables the INT Interrupt output.

2

INT Polarity

Read/Write

A one selects an active high open source output while a zero selects an active low open drain

Select

output.

3

INT_Clear

Read/Write

A one disables the INT output without affecting the contents of Interrupt Status Registers. The

device will stop monitoring. It will resume upon clearing of this bit.

4

RESET

Read/Write

A one outputs at least a 10 ms active low reset signal at RST_OUT, if bit 7 and bit 6 in the Fan

Divisor/RST_OUT/OS Register (address 05h) = 1 and = 0, respectively. This bit is cleared once the

pulse has gone inactive.

5

Chassis Clear

Read/Write

A one clears the GPI (Chassis Intrusion) pin. This bit clears itself after 10 ms.

6

GPO

Read/Write

A one drives the GPO (General Purpose Output) pin low.

7

INITIALIZATION

Read/Write

A one restores power on default value to the Configuration Register, Interrupt Status Registers,

Interrupt Mask Registers, Fan Divisor/RST_OUT/OS Register, the OS Configuration/Temperature

Resolution Register, Conversion Rate, Channel Disable, Manufacturers ID and Stepping/Die

revision ID registers. This bit clears itself. The power-on default is zero.

Interrupt Status Register 1—Address 01h

Power on default <7:0> = 0000 0000 binary

Bit

Name

Read/Write

Description

0

IN0

Read Only

A one indicates a High or Low limit has been exceeded.

1

IN1

Read Only

A one indicates a High or Low limit has been exceeded.

2

IN2

Read Only

A one indicates a High or Low limit has been exceeded.

3

IN3

Read Only

A one indicates a High or Low limit has been exceeded.

4

IN4

Read Only

A one indicates a High or Low limit has been exceeded.

5

IN5

Read Only

A one indicates a High or Low limit has been exceeded.

6

IN6

Read Only

A one indicates a High or Low limit has been exceeded.

7

INT_IN

Read Only

A one indicates that a Low has been detected on the INT_IN.

24

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