LM96194CISQ/NOPB National Semiconductor, LM96194CISQ/NOPB Datasheet - Page 88

• 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

www.national.com
16.13.20 Register CFh PWM2 Control 4
Register
Address
LUT Duty Cycle Assignments when HF_LUT_MAP='0'
CFh
LUT Step
10
11
12
13
LUT 1-4 Duty Cycle Assignment with PWM Frequency=22.5kHz as Controlled by the HF_LUT_MAP bit.
1
2
3
4
5
6
7
8
9
Read/
Write
R/W
2:0
7:4
Bit
3
HF_LUT_MAP
Register
Control 4
PWM2
Name
FREQ2
Name
RES
Duty Cycle (%)
31.25
43.75
56.25
62.25
68.75
81.25
93.75
37.5
87.5
100
25
50
75
Bit 7
RES
FREQ1
0h
1h
2h
3h
4h
5h
6h
7h
R/W
R/W
R/W
R
Bit 6
RES
PWM2 frequency control. Controls the frequency of the
PWM2 output in the same fashion as FREQ1 in the
PWM1 Control 4 register.
Selects between two different maps for the PWM duty
cycle assignment in the LUT when the PWM frequency
is set to 22.5kHz. All 4 LUTs, VRD ramp, PROCHOT
ramp, spin-up, and low-resolution override will be
affected by this bit. When this bit is cleared the LUT duty
cycle assignment will increment 6.25% steps starting at
25%. When this bit is set the duty cycle mapping will
match the Low Frequency table. This bit has no effect
when the PWM frequency is set to anything other than
22.5kHz and the low PWM frequency mapping will be
used.
Reserved
Bit 5
RES
88
Bit 4
LUT Duty Cycle Assignments when HF_LUT_MAP='1'
RES
Frequency of
LUT Step
PWM1 (Hz)
10
11
12
13
22500
1
2
3
4
5
6
7
8
9
Description
96
84
72
60
48
36
12
HF_LUT
_MAP
(Low PWM Frequency Mapping)
Bit 3
Bit 2
Duty Cycle (%)
FREQ2
Bit 1
28.57
32.14
35.71
39.29
42.86
46.43
53.57
57.14
71.43
85.71
100
25
50
Bit 0
Default
Value
00h