LM96194CISQ/NOPB National Semiconductor, LM96194CISQ/NOPB Datasheet - Page 48

• 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
Register
Address
16.7.11 Register 3Dh PI Coefficient Exponents
16.8 DEVICE IDENTIFICATION REGISTERS (3Eh-3Fh)
16.8.1 Register 3Eh Manufacturer ID
Register
Address
The Manufacturer ID register contains the manufacturer identification number. This number is assigned by National Semiconductor
and is a method for uniquely identifying the part manufacturer.
16.8.2 Register 3Fh Version/Stepping
The four least significant bits of the Version/Stepping register [3:0] contain the current stepping of the LM96194 silicon. The four
most significant bits [7:4] reflect the LM96194 version number. The LM96194 has a fixed version number of 0111b which matches
the LM93, since the LM96194 is closely related to the LM93. To differentiat the LM96194 from the LM93 for the first stepping of
LM96194 this register reads 01111000b. For the second stepping of the LM96194, this register reads 01111001b and so on. It is
incrementally increased for future versions for the silicon. The final released silicon has a stepping of 9h therefore this register
reads 79h. Since the LM96194 is so closely related to the LM94 the LM94 and LM96194 have the same VER and STP values.
The register is used by application software to identify which device in the family of hardware monitoring ASICs has been imple-
mented in the given system. Based on this information, software can determine which registers to read from and write to. Application
software may use the current stepping to implement work-a-rounds for bugs found in a specific silicon stepping.
16.9 BMC ERROR STATUS REGISTERS 40h–47h
The B_Error Status Registers contain several bits that each represent a particular error event that the LM96194 can monitor. The
LM96194 sets a given bit whenever the corresponding error event occurs. The BMC_ERR bit in the LM96194 Status/Control
register is also set if any bit in the BMC Error Status registers is set. If enabled, ALERT is also asserted anytime BMC_ERR is set.
The exception to this is the fixed threshold error status bits in the PROCHOT Error Status registers. They have no influence on
BMC_ERR or ALERT.
3Dh
3Eh
3Fh
1:0
2:3
7:4
Bit
Read/
Write
R/W
Read/
Read/
PCE[1:0]
Write
Write
R
R
ICE[1:0]
10b
11b
00b
01b
10b
11b
00b
01b
Register Name
PI Exponents
PCE[1:0]
ICE[1:0]
Name
RES
Version/Stepping
Manufacturer ID
Register
Register
Name
Name
Bit 7
RES
R/W
R/W
R/W
R
Bit 7
Bit 7
Bit 6
0
RES
0
Description
PI controller integral coefficient exponent (2-bit signed value)
PI controller proportional coefficient exponent (2-bit signed value)
Reserved
Bit 6
Bit 6
0
1
VER[3:0]
Bit 5
RES
48
Bit 5
Bit 5
0
1
Proportional Exponent
Bit 4
RES
Integral Exponent
Bit 4
Bit 4
0
1
-2
-1
Bit 3
0
1
-2
-1
0
1
Bit 3
PCE[1:0]
Bit 3
0
1
Bit 2
Bit 2
Bit 2
0
0
STP[3:0]
Bit 1
Bit 1
Bit 1
0
0
ICE[1:0]
Bit 0
Bit 0
Bit 0
0
1
Default
Default
Value
Value
Default
01h
Value
79h
00h