Functional Description (Continued)
12.4 Interrupt Status Register 1 — Address 01h
=
>
<
Power on default 7:0
0000 0000 binary
Bit
0
Name
IN0
Read/Write
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
Description
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.
1
IN1
2
IN2
3
IN3
4
IN4
5
IN5
6
IN6
7
INT_IN
12.5 Interrupt Status Register 2 — Address 02h
=
>
<
Power on default 7:0
0000 0000 binary
Bit
Name
Read/Write
Description
0
1
Hot Temperature
Read Only
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.
BTI
Read Only
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.
2
3
4
FAN1
FAN2
Read Only
Read Only
Read Only
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.
CI (Chassis
Intrusion)
5
OS bit
Read Only
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.
6
7
Reserved
Reserved
Read Only
Read Only
12.6 Interrupt Mask Register 1 — Address 03h
=
>
<
Power on default 7:0
Bit Name
IN0
0000 0000 binary
Read/
Description
Write
0
1
2
3
4
5
6
7
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
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.
IN1
IN2
IN3
IN4
IN5
IN6
INT_IN
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