LM96194CISQ/NOPB National Semiconductor, LM96194CISQ/NOPB Datasheet - Page 92

• 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

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Register
Address
16.13.26 Register E3h LM96194 Configuration
E3h
Read/
Write
R/W
Lock
X
x
Configuration
LM96194
Register
Bit
0
1
2
3
4
5
6
7
Name
ALERT_EN
COMP_EN
ALERT_
READY
START
GMSK
Name
LOCK
RES
RES
READY
Bit 7
Bit 6
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RES
R
COMP_EN
When this bit is 0, the LM96194 operates in basic mode.
All error events are masked. The auto fan control
algorithm is disabled. Both PWMs are set to 0%. All
monitoring functions are active and the value registers
are updated.
Once this bit is set, error events are no longer globally
masked, and the auto-fan control algorithm is enabled.
Fan boost uses the programmed values.
It is expected that all limit and setup registers are set by
BIOS or application software prior to setting this bit.
Setting this bit locks all registers and register bits that are
indicated as lockable. Lockable registers have an “x” in
the Lock column of their description. This register is
locked once it is set. This bit can only be cleared by an
external device asserting RESET.
Global Mask
When this bit is set by software, all error events are
masked. Setting this bit does not effect any other mask
registers or value registers.
When this bit is set, the ALERT output is enabled. If this
bit is cleared, the ALERT output is disabled.
RESERVED. Must be left low for proper operation of
PROCHOT circuitry.
When this bit is set the ALERT output will function in the
thermal comparator mode. In the thermal comparator
mode ALERT will be asserted only for unmasked thermal
error events. ALERT will be de-assserted immediately
when the error event ceases.
Reserved
The LM96194 sets this bit automatically after valid data
has been collected for all temperatures and voltages.
Software should not use any temperature or voltage
values until this bit has been set.
ALERT_
Bit 5
92
Bit 4
RES
Description
ALERT
Bit 3
_EN
GMSK
Bit 2
LOCK
Bit 1
START
Bit 0
Default
Value
00h