LM93CIMT National Semiconductor, LM93CIMT Datasheet - Page 76

• Manufacturer Part Number: LM93CIMT
• Description: Microprocessor Support IC
• Manufacturer: National Semiconductor

Specifications of LM93CIMT

• Peak Reflow Compatible (260 C): No
• Supply Voltage Max: 3.6V
• Leaded Process Compatible: No
• Supply Voltage Min: 3V
• Operating Temperature Min: 0��C
• Package / Case: 56-TSSOP
• Operating Temperature Max: 85°C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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Register
Address
Register
Address
16.0 Registers
16.8.21 Register D0h–D3h Zone 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.
16.8.22 Register D4h–DFh Lookup Table Steps — Zone 1/2 and Zone 3/4 Offset Temperature
There are two look up tables of 13 steps (12 offsets), one for Zones 1 and 2 the other for Zones 3 and 4. Each 8-bit offset register
contains the offset temperature for Zones 1 and 2 as well as the offset temperature for Zones 3 and 4. The format for the offsets
is a 4-bit unsigned value, and one LSB = 1˚C.
See the Section 15.10 FAN CONTROL for information on how the base temperature/lookup table should be used for controlling
the PWM output(s).
DCh
DDh
D0h
D1h
D2h
D3h
DAh
DBh
DEh
DFh
D4h
D5h
D6h
D7h
D8h
D9h
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
Zone 1 Base
Zone 2 Base
Zone 3 Base
Zone 4 Base
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
Register
Register
(Continued)
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
Bit 7
Bit 7
7
7
7
7
Bit 6
Bit 6
Z3/4_STEP10
Z3/4_STEP11
Z3/4_STEP12
Z3/4_STEP13
Z3/4_STEP2
Z3/4_STEP3
Z3/4_STEP4
Z3/4_STEP5
Z3/4_STEP6
Z3/4_STEP7
Z3/4_STEP8
Z3/4_STEP9
6
6
6
6
Bit 5
Bit 5
76
5
5
5
5
Bit 4
Bit 4
4
4
4
4
Bit 3
Bit 3
3
3
3
3
Bit 2
Bit 2
Z1/2_STEP10
Z1/2_STEP12
Z1/2_STEP13
Z1/2_STEP11
Z1/2_STEP2
Z1/2_STEP3
Z1/2_STEP4
Z1/2_STEP5
Z1/2_STEP6
Z1/2_STEP7
Z1/2_STEP8
Z1/2_STEP9
2
2
2
2
Bit 1
Bit 1
1
1
1
1
Bit 0
Bit 0
0
0
0
0
Default
Default
Value
Value
N/D
N/D
N/D
N/D
N/D
N/D
N/D
N/D
N/D
N/D
N/D
N/D
N/D
N/D
N/D
N/D