LM80 National Semiconductor, LM80 Datasheet - Page 24

• Manufacturer Part Number: LM80
• Description: Serial Interface ACPI-Compatible Microprocessor System Hardware Monitor
• Manufacturer: National Semiconductor

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Bit
Bit
Bit
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
Functional Description
12.4 Interrupt Status Register 1 — Address 01h
Power on default
12.5 Interrupt Status Register 2 — Address 02h
Power on default
12.6 Interrupt Mask Register 1 — Address 03h
Power on default
Hot Temperature
BTI
FAN1
FAN2
CI (Chassis
Intrusion)
OS bit
Reserved
Reserved
IN0
IN1
IN2
IN3
IN4
IN5
IN6
INT_IN
IN0
IN1
IN2
IN3
IN4
IN5
IN6
INT_IN
Name
Name
Name
<
<
<
7:0
7:0
7:0
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
>
>
>
Read/
Write
= 0000 0000 binary
= 0000 0000 binary
= 0000 0000 binary
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
Read/Write
A one disables the corresponding interrupt status bit for INT interrupt.
A one disables the corresponding interrupt status bit for INT interrupt.
A one disables the corresponding interrupt status bit for INT interrupt.
A one disables the corresponding interrupt status bit for INT interrupt.
A one disables the corresponding interrupt status bit for INT interrupt.
A one disables the corresponding interrupt status bit for INT interrupt.
A one disables the corresponding interrupt status bit for INT interrupt.
A one disables the corresponding interrupt status bit for INT interrupt.
A one indicates a High or Low limit has been exceeded.
A one indicates a High or Low limit has been exceeded.
A one indicates a High or Low limit has been exceeded.
A one indicates a High or Low limit has been exceeded.
A one indicates a High or Low limit has been exceeded.
A one indicates a High or Low limit has been exceeded.
A one indicates a High or Low limit has been exceeded.
A zero indicates that a Low has been detected on the INT_IN.
(Continued)
A one indicates a High or Low limit has been exceeded. Only “One-Time Interrupt”
and “Default Interrupt” modes are supported. The mode is set by bit-6 of the
Interrupt Mask Register 2.
A one indicates that an interrupt has occurred from the Board Temperature
Interrupt (BTI) input pin. BTI can be tied to the OS output of multiple LM75 chips.
A one indicates that a fan count limit has been exceeded.
A one indicates that a fan count limit has been exceeded.
A one indicates CI (Chassis Intrusion) has gone high.
A one indicates a High or a Low OS Temperature limit has been exceed. Only
comparator mode is supported. Only “One-Time Interrupt” and “Default Interrupt”
modes are supported. The mode is set by bit-7 of the Interrupt Mask Register 2.
24
Description
Description
Description