LM96194CISQ/NOPB National Semiconductor, LM96194CISQ/NOPB Datasheet - Page 89

• Manufacturer Part Number: LM96194CISQ/NOPB
• Description: IC TRUTHERM HDWR MONITOR 48-LLP
• Manufacturer: National Semiconductor
• Series: PowerWise®, TruTherm®r

Specifications of LM96194CISQ/NOPB

• Function: Fan Control, Temp Monitor
• Topology: ADC (Sigma Delta), Comparator, Fan Control, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: -40°C ~ 85°C, External Sensor
• Output Type: SMBus™
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-LLP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM96194CISQTR

16.13.21 Register D0h–D3h LUT 1 to 4 Base Temperatures
The value in this register is used as the base in the temperature calculation for the auto fan control look-up table. These registers
use the standard temperature format (8-bit signed data). The look-up table contains the temperature offsets. The offsets are added
to the base temperature to determine the true temperature to be used for each table entry for auto fan control.
16.13.22 Register D4h–DFh Lookup Table Steps—LUT 1/2 and LUT 3/4 Offset Temperature
There are two look up tables of 13 steps (12 offsets), one for LUT 1 and 2 the other for LUT 3 and 4. Each 8-bit offset register
contains the offset temperature for LUT 1 and 2 as well as the offset temperature for LUT 3 and 4. The format for the offsets is a
4-bit unsigned value, and one LSB is either 1°C or 0.5°C. The offset resolution is controlled by LT34_RS and LT12_RS bits found
in the Special Function Control 2 register (at address BDh). Therefore, the offset range is variable as well and is either 15°C to 0°
C or 7.5°C to 0°C.
See the
the PWM output(s).
Register
Address
Register
Address
DAh
DBh
DCh
DDh
DEh
D0h
D1h
D2h
D3h
D4h
D5h
D6h
D7h
D8h
D9h
DFh
Section 15.10 FAN CONTROL
Read/
Read/
Write
Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Temperature
Temperature
Temperature
Temperature
Temp Offset
Temp Offset
Temp Offset
Temp Offset
Temp Offset
Temp Offset
Temp Offset
Temp Offset
Temp Offset
Temp Offset
Temp Offset
Temp Offset
LUT 1 Base
LUT 2 Base
LUT 3 Base
LUT 4 Base
Register
Register
Step 10
Step 11
Step 12
Step 13
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
Step 8
Step 9
Name
Name
for information on how the base temperature/lookup table should be used for controlling
Bit 7
Bit 7
7
7
7
7
LUT3/4_STEP10
LUT3/4_STEP11
LUT3/4_STEP12
LUT3/4_STEP13
LUT3/4_STEP2
LUT3/4_STEP3
LUT3/4_STEP4
LUT3/4_STEP5
LUT3/4_STEP6
LUT3/4_STEP7
LUT3/4_STEP8
LUT3/4_STEP9
Bit 6
Bit 6
6
6
6
6
89
Bit 5
Bit 5
5
5
5
5
Bit 4
Bit 4
4
4
4
4
Bit 3
Bit 3
3
3
3
3
LUT1/2_STEP10
LUT1/2_STEP11
LUT1/2_STEP12
LUT1/2_STEP13
LUT1/2_STEP2
LUT1/2_STEP3
LUT1/2_STEP4
LUT1/2_STEP5
LUT1/2_STEP6
LUT1/2_STEP7
LUT1/2_STEP8
LUT1/2_STEP9
Bit 2
Bit 2
2
2
2
2
Bit 1
Bit 1
1
1
1
1
Bit 0
Bit 0
0
0
0
0
www.national.com
Default
Default
Value
Value
00h
00h
00h
00h
00h
00h
00h
00h
00h
00h
00h
00h
00h
00h
00h
00h