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LM94 Datasheet(PDF) 11 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part # LM94
Description  TruTherTM Hardware Monitor with PI Loop Fan Control for Server Management
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM94 Datasheet(HTML) 11 Page - National Semiconductor (TI)

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13.0 Registers (Continued)
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Register Name
Address
Description
EXTENDED RESOLUTION TEMPERATURE VALUE REGISTERS
Z2b_LSB
16h
Zone 2b (CPU2) extended resolution unfiltered temperature
value register, least-significant-byte
Z2b_MSB
17h
Zone 2b (CPU2) extended resolution unfiltered temperature
value register, most-significant byte
Z1a_F_LSB
18h
Zone 1a (CPU1) extended resolution filtered temperature value
register, least-significant byte
Z1a_F_MSB
19h
Zone 1a (CPU1) extended resolution filtered temperature value
register, most-significant byte
Z1b_F_LSB
1Ah
Zone 1b (CPU1) extended resolution filtered temperature value
register, least-significant-byte
Z1b_F_MSB
1Bh
Zone 1b (CPU1) extended resolution filtered temperature value
register, most-significant byte
Z2a_F_LSB
1Ch
Zone 2a (CPU2) extended resolution filtered temperature value
register, least-significant-byte
Z2a_F_MSB
1Dh
Zone 2a (CPU2) extended resolution filtered temperature value
register, most-significant byte
Z2b_F_LSB
1Eh
Zone 2b (CPU2) extended resolution filtered temperature value
register, least-significant-byte
Z2b_F_MSB
1Fh
Zone 2b (CPU2) extended resolution filtered temperature value
register, most-significant byte
Z3_LSB
20h
Zone 3 (Internal) extended resolution temperature value
register, least-significant byte
Z3_MSB
21h
Zone 3 (Internal) extended resolution temperature value
register, least-significant byte
Z4_LSB
22h
Zone 4 (External Digital) extended resolution temperature value
register, most-significant byte
Z4_MSB
23h
Zone 4 (External Digital) extended resolution temperature value
register, least-significant byte
Reserved
24h-30h
PI LOOP AND FAN CONTROL SETUP REGISTERS
x
Temperature Source Select
31h
Selects the temperature source for some temperature zones.
x
PWM Filter Settings
32h
Sets the IIR filter coefficients for the PWM outputs for low
resolution sources
x
PWM1 Filter Shutoff Threshold
33h
PWM1 Filter Shutoff Threshold
x
PWM2 Filter Shutoff Threshold
34h
PWM2 Filter Shutoff Threshold
x
PI/LUT Fan Control Bindings
35h
PI/LUT fan control binding configuration
x
PI Controller Minimum PWM and
Hysteresis
36h
PI Controller Minimum PWM and Hysteresis settings
x
Zone 1 Tcontrol
37h
Zone 1 (CPU1) PI Controller Target Temperature (Tcontrol)
x
Zone 2 Tcontrol
38h
Zone 2 (CPU2) PI Controller Target Temperature (Tcontrol)
x
Zone 1 Toff
39h
Zone 1 (CPU1) PI Controller Off Temperature (Toff)
x
Zone 2 Toff
3Ah
Zone 2 (CPU2) PI Controller Off Temperature (Toff)
x
P Coefficient
3Bh
PI controller proportional coefficient
x
I Coefficient
3Ch
PI controller integral coefficient
x
PI Exponents
3Dh
PI controller coefficient exponents
DEVICE IDENTIFICATION REGISTERS
Manufacturer ID
3Eh
Contains manufacturer ID code
www.national.com
11


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