LM96000EVAL/NOPB National Semiconductor, LM96000EVAL/NOPB Datasheet - Page 27

• 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

6Ah
6Bh
6Ch
Register
Address
4.19 Registers 6A-6Ch: Absolute Temperature Limit
In the Auto Fan mode, if a zone exceeds the temperature set in the Absolute Temperature Limit register, all of the PWM outputs
will incresase its duty cycle to 100%. This is a safety feature that attempts to cool the system if there is a potentially catastrophic
thermal event. If set to 80h (-128°C), the feature is disabled. Default=100°C=64h
These registers become Read Only when the Ready/Lock/Start/Override register Lock bit is set. Any further attempts to write to
these registers shall have no effect. After power up the default values are used whenever the Ready/Lock/Start/Override register
Start bit is cleared even though modifications to these registers are possible.
R/W
R/W
R/W
Read/
Write
Zone1 Absolute Temp Limit
Zone2 Absolute Temp Limit
Zone3 Absolute Temp Limit
Register
Name
Temperature
Temperature
TABLE 10. Temperature Limit vs Register Setting
−127°C
−127°C
−50°C
127°C
TABLE 11. Absolute Limit vs Register Setting
−50°C
127°C
50°C
50°C
0°C
0°C
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
(MSB)
Reading (Decimal)
Reading (Decimal)
Bit 7
7
7
7
−127
−127
−50
127
−50
127
Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1
50
50
0
0
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
27
6
6
6
5
5
5
Reading (Hex)
Reading (Hex)
4
4
4
CEh
CEh
81h
00h
32h
7Fh
81h
00h
32h
7Fh
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
3
3
3
2
2
2
1
1
1
(LSB)
Bit 0
0
0
0
Default
Value
64h
64h
64h
www.national.com
Lock?
✓
✓
✓