LM96000CIMT/NOPB National Semiconductor, LM96000CIMT/NOPB Datasheet - Page 17

• Manufacturer Part Number: LM96000CIMT/NOPB
• Description: IC HDWR MON W/FAN CTRL 24-TSSOP
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM96000CIMT/NOPB

• Function: Fan Control, Temp Monitor
• Topology: ADC (Sigma Delta), Comparator, Fan Control, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: 0°C ~ 85°C, External Sensor
• Output Type: SMBus™
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP
• Ic Output Type: Digital
• Sensing Accuracy Range: ± 2.5°C
• Temperature Sensing Range: 0°C To +85°C
• Supply Current: 530µA
• Supply Voltage Range: 3V To 3.6V
• Resolution (bits): 8bit
• Sensor Case Style: TSSOP
• No. Of Pins: 24
• Rohs Compliant: Yes
• Accuracy %: 3°C
• For Use With: LM96000EVAL - BOARD EVALUATION LM96000
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM96000CIMT; *LM96000CIMT/NOPB; LM96000CIMT

Register
Address
42h
Bit
0
1
2
3
4
5
6
7
Register
Address
43h
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.
4.10 Register 43h: VID
The VID register contains the values of LM96000 VID0–VID4 input pins. This register indicates the status of the VID lines that
interconnect the processor to the Voltage Regulator Module (VRM). Software uses the information in this register to determine the
voltage that the processor is designed to operate at. With this information, software can then dynamically determine the correct
values to place in the VCCP Low Limit and VCCP High Limit registers.
This register is read only — a write to this register has no effect.
Name
+12V_Error
Reserved
Fan1 Stalled
Fan2 Stalled
Fan3 Stalled
Fan4 Stalled
Remote Diode 1
Fault
Remote Diode 2
Fault
Read/
Write
R
Read/
Write
R
Register
Name
Interrupt Status Register 2
Register
Name
VID0–4
R/W
R
R
R
R
R
R
R
R
Default
0
0
0
0
0
0
0
0
Bit 7
(MSB)
RES
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.
The LM96000 automatically sets this bit to 1 when there is either a short or open
circuit fault on the Remote2+ or Remote2− thermal diode input pins. A diode fault
will also set bit 6, Diode 2 Zone Limit bit, of Interrupt Status Register 1.
Bit 6
RES
Bit 7
(MSB)
ERR2
Bit 5
RES
Bit 6
ERR1
17
Bit 4
VID4
Bit 5
FAN4
Bit 4
FAN3
Bit 3
VID3
Bit 3
FAN2
Bit 2
VID2
Bit 2
FAN1
Bit 1
VID1
Bit 1
RES
Bit 0
(LSB)
VID0
Bit 0
(LSB)
12V
www.national.com
Default
Value
Default
Value
00h