LM96194CISQ/NOPB National Semiconductor, LM96194CISQ/NOPB Datasheet - Page 71

• 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

Register
Address
16.13 SETUP REGISTERS
16.13.1 Register BCh Special Function Control 1 (Voltage Hysteresis and Fan Control Filter Enable)
In order for the LCFE1, LCFE2, FCFE1 and FCFE2 bits to work correctly, the ZN1E and ZN2E bits in the Zones 1/2 Spike Smoothing
Control register (at address C2h) should be cleared.
Application Note: If hysteresis for voltage limit comparisons is non-zero, special care needs to be taken when changing the voltage
limit registers while a voltage error condition exists. If software relaxes the voltage limits in an attempt to prevent an error condition,
it may be necessary to relax the limits by an amount greater than the hysteresis value and wait several milliseconds before at-
tempting to clear the error status bit for the given voltage channel. Once the error status bit has been cleared, the desired limit(s)
can be programmed.
BCh
2:0
Bit
3
4
5
6
7
LCFE1
LCFE2
FCFE1
FCFE2
Name
RES
VH
Read/
Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Special Function
R
Register
Control 1
Name
Voltage hysteresis control. This determines the amount of hysteresis to be applied to all voltage
limit comparisons. It applies to both high and low limits. One LSB equals one A/D count, so the
actual voltage represented by one LSB depends on the voltage channel.
Limit Comparison Filter Enable. Setting this bit causes limit comparisons for temperature zone 1a
and 1b to use the filtered (spike smoothed) temperature instead of the unfiltered temperature.
Limit Comparison Filter Enable. Setting this bit causes limit comparisons for temperature zone 2a
and 2b to use the filtered (spike smoothed) temperature instead of the unfiltered temperature.
Fan Control Filter Enable. Setting this bit causes fan control functions for zone 1a and 1b (including
fan boost) to use the filtered (spike smoothed) temperature instead of the unfiltered temperature.
This includes the PI Loop controller, LUT, and temperature fan boost functions.
Fan Control Filter Enable. Setting this bit causes fan control functions for zone 2a and 2b (including
fan boost) to use the filtered (spike smoothed) temperature instead of the unfiltered temperature.
This includes the PI Loop controller, LUT, and temperature fan boost functions.
Reserved
Bit 7
RES
FCFE2
Bit 6
71
FCFE1
Bit 5
Description
LCFE2
Bit 4
LCFE1
Bit 3
Bit 2
Bit 1
VH
Bit 0
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Default
Value
00h