LM96000EVAL/NOPB National Semiconductor, LM96000EVAL/NOPB Datasheet - Page 19

• Manufacturer Part Number: LM96000EVAL/NOPB
• Description: BOARD EVALUATION LM96000
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM96000EVAL/NOPB

• Sensor Type: Temperature, Fan Controller
• Sensing Range: 0°C ~ 125°C
• Interface: SMBus (2-Wire/I²C)
• Sensitivity: ±1°C
• Voltage - Supply: 3 V ~ 3.6 V
• Embedded: No
• Utilized Ic / Part: LM96000
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM96000EVAL

Register
Address
4Eh
4Fh
50h
51h
52h
53h
4.12 Registers 4E-53h: Temperature Limit Registers
If an external temperature input or the internal temperature sensor either exceeds the value set in the corresponding high limit
register or falls below the value set in the corresponding low limit register, the corresponding bit will be set automatically by the
LM96000 in the Interrupt Status Register 1 (41h). For example, if the temperature read from the Remote1− and Remote1+ inputs
exceeds the Processor (Zone1) High Temp register limit setting, Interrupt Status Register 1 ZN1 bit will be set. The temperature
limits in these registers are represented as 8 bit, 2’s complement, signed numbers in Celsius, as shown below in Table 3.
Setting the Ready/Lock/Start/Override register Lock bit has no effect on these registers.
Read/
Write
R/W
R/W
R/W
R/W
R/W
R/W
Register
Name
Processor (Zone1)
Low Temp
Processor (Zone1)
High Temp
Processor (Zone2)
Low Temp
Processor (Zone2)
High Temp
Processor (Zone3)
Low Temp
Processor (Zone3)
High Temp
Temperature
TABLE 3. Temperature Limits vs Register Settings
−127°C
−50°C
127°C
50°C
0°C
.
.
.
.
.
.
.
.
.
.
.
.
Bit 7
(MSB)
7
7
7
7
7
7
Reading (Decimal)
Bit 6
6
6
6
6
6
6
−127
−50
127
50
0
.
.
.
.
.
.
.
.
.
.
.
.
19
Bit 5
5
5
5
5
5
5
Bit 4
4
4
4
4
4
4
Reading (Hex)
CEh
81h
00h
32h
7Fh
.
.
.
.
.
.
.
.
.
.
.
.
Bit 3
3
3
3
3
3
3
Bit 2
2
2
2
2
2
2
Bit 1
1
1
1
1
1
1
Bit 0
(LSB)
0
0
0
0
0
0
www.national.com
Default
Value
81h
7Fh
81h
7Fh
81h
7Fh