LM96000CIMT National Semiconductor, LM96000CIMT Datasheet - Page 15

• Manufacturer Part Number: LM96000CIMT
• Description: IC,Data Acquisition System,7-CHANNEL,8-BIT,TSSOP,24PIN,PLASTIC
• Manufacturer: National Semiconductor

Specifications of LM96000CIMT

• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Bit
4
5
6
7
Register
Address
42h
Bit
0
1
2
3
4
5
6
Functional Description
4.9 Register 42h: Interrupt Status Register 2
The Interrupt Status Register 2 bits will be automatically set, by the LM96000, whenever a fault condition is detected. Interrupt
Status Register 2 identifies faults caused by temperature sensor error, fan speed droping below minimum set by the tachometer
minimum register, the 12V input voltage going outside the window set by its limit registers. Interrupt Status Register 2 will hold
a set bit until the event is read by software. The contents of this register will be cleared (set to 0) automatically by the LM96000
after it is ready by software, if fault condition no longer exists. Once set, the Interrupt Status Register 2 bits will remain set until
a read event occurs, even if the fault no longer exists
This register is read only — a write to this register has no effect.
Name
Zone 1 Limit
Exceeded
Zone 2 Limit
Exceeded
Zone 3 Limit
Exceeded
Error in Status
Register 2
Name
+12V_Error
Reserved
Fan1 Stalled
Fan2 Stalled
Fan3 Stalled
Fan4 Stalled
Remote Diode
1 Fault
Read/
Write
R
Register
Name
Interrupt Status Register 2
R/W
R
R
R
R
R/W
R
R
R
R
R
R
R
Default
0
0
0
0
Default
0
0
0
0
0
0
0
(Continued)
Bit 7
(MSB)
ERR2
Description
The LM96000 automatically sets this bit to 1 when the temperature input
measured by the Remote1− and Remote1+ inputs is less than or equal to
the limit set in the Processor (Zone1) Low Temp register or more than the
limit set in the Processor (Zone1) High Temp register. This bit will be set
when a diode fault is detected.
The LM96000 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 (Zone2) Low Temp register or greater than the limit
set in the Internal (Zone2) High Temp register.
The LM96000 automatically sets this bit to 1 when the temperature input
measured by the Remote2− and Remote2+ inputs is less than or equal to
the limit set in the Internal (Zone2) Low Temp register or greater than the
limit set in the Remote (Zone3) High Temp register. This bit will be set
when a diode fault is detected.
If there is a set bit in Status Register 2, this bit will be set to 1.
Description
The LM96000 automatically sets this bit to 1 when the 12V input voltage
either falls below the limit set in the 12V Low Limit register or exceeds the
limit set in the 12V High Limit register.
Reserved
The LM96000 automatically sets this bit to 1 when the TACH1 input
reading is above the value set in the Tach1 Minimum MSB and LSB
registers.
The LM96000 automatically sets this bit to 1 when the TACH2 input
reading is above the value set in the Tach2 Minimum MSB and LSB
registers.
The LM96000 automatically sets this bit to 1 when the TACH3 input
reading is above the value set in the Tach3 Minimum MSB and LSB
registers.
The LM96000 automatically sets this bit to 1 when the TACH4 input
reading is above the value set in the Tach4 Minimum MSB and LSB
registers.
The LM96000 automatically sets this bit to 1 when there is either a short
or open circuit fault on the Remote1+ or Remote1− thermal diode input
pins. A diode fault will also set bit 4, Diode 1 Zone Limit bit, of Interrupt
Status Register 1.
Bit 6
ERR1
15
Bit 5
FAN4
Bit 4
FAN3
Bit 3
FAN2
Bit 2
FAN1
Bit 1
RES
Bit 0
(LSB)
12V
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Default
Value
00h