LM96163CISDX/NOPB National Semiconductor, LM96163CISDX/NOPB Datasheet - Page 19

• Manufacturer Part Number: LM96163CISDX/NOPB
• Description: IC TEMP SENSOR DGTL REMOTE 10LLP
• Manufacturer: National Semiconductor
• Series: PowerWise®, TruTherm®r

Specifications of LM96163CISDX/NOPB

• Function: Fan Control, Temp Monitor
• Topology: ADC (Sigma Delta), Comparator, Register Bank, Tach
• Sensor Type: External & Internal
• Sensing Temperature: -40°C ~ 85°C, External Sensor
• Output Type: SMBus™
• Output Alarm: Yes
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-LLP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM96163CISDX

Address
45
2.4 LM96163 DETAILED REGISTER DESCRIPTIONS IN FUNCTIONAL ORDER
The following is a Register Map grouped in functional and sequence order. New register addresses have been added to maintain
compatibility with the LM63 and LM64 register sets. Addresses in parenthesis are mirrors of named address for backwards com-
patibility with some older software. Reading or writing either address will access the same 8-bit register.
Fan Control Registers
Hex
HEX
45
ENHANCED CONFIGURATION
Read/
Write
R/W
R/W
R/W
R/W
R/W
R/W
R
Bits
2:1
7
6
5
4
3
0
Value
POR
00
0
0
0
0
0
0
RRS1:RRS0
[Reserved]
STFBE
Name
PSRR
LRES
PHR
USF
This bit is unused and always read as 0.
Signed Temperature Filter Bits Enable
0: external signed temperature LSbs [4:3] will always read "0" (backwards
compatible with the LM63)
1: when the digital filter is enabled the external signed temperature LSbs [4:3]
(1/16 and 1/32 resolution) are enabled
Lookup Table Resolution Extension
0: LUT temperature resolution 7-bits (LSb = 1°C, backwards compatible with the
LM63)
1: enable 8-bit LUT temperature resolution (LSb extended to 0.5°C)
22.5kHz PWM High Resolution Control (only effective when PWM frequency set
to 22.5kHz)
0: PWM resolution 6.25% (backwards compatible with the LM63)
1: enable high resolution (0.39%)
Unsigned High and T_CRIT Setpoint Format
0: enable signed format for High and T_CRIT setpoints (11-bit is -128.000°C to
127.875°C or 8-bit is -128°C to 127°C)
1: enable unsigned format for High and T_CRIT setpoints (11-bit is 0°C to
255.875°C or 8-bit is 0°C to 255°C)
PWM Smoothing Ramp Rate Setting (these bits can modified only when PWM
Programming is enabled, 0x4A[5]=1)
00: 0.023 s per step (5.45 seconds for 0 to 100% duty cycle transition with 0.39%
resolution)
01: 0.046 s per step (10.9 seconds for 0 to 100% duty cycle transition with 0.39%
resolution)
10: 0.91 s per step (21.6 seconds for 0 to 100% duty cycle transition with 0.39%
resolution)
11: 0.182 s per step (43.7 seconds for 0 to 100% duty cycle transition with 0.39%
resolution)
Note: PWM smoothing is disabled for PWM spinup and for duty cycle setting
override caused by a TCRIT event, thus it is only enabled during LUT transitions.
PWM smoothing is only effective when PWM frequency is set to 22.5kHz.
PWM Smoothing Ramp Rate Control (this bit can modified only when the PWM
Programming is enabled, 0x4A[5]=1)
0: PWM smoothing disabled (LM63 backwards compatible)
1: enable ramp rate control (as controlled by 0x45[2:1])
Note: PWM smoothing is disabled for PWM spinup and for duty cycle setting
override caused by a TCRIT event, thus it is only enabled during LUT transitions.
PWM smoothing is only effective when PWM frequency is set to 22.5kHz
19
Description
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