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LM93 Datasheet(PDF) 63 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part # LM93
Description  Hardware Monitor with Integrated Fan Control for Server Management
PDF  92 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM93 Datasheet(HTML) 63 Page - National Semiconductor (TI)

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16.0 Registers (Continued)
16.8.2 Register BDh
Special Function Control 2 (Smart Tach Mode Enable and Fan Control Temperature Resolution
Control)
Register
Address
Read/
Write
Register
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Default
Value
BDh
R/W
Special Function
Control 2
RES
RES
ZN34
_RS
ZN12
_RS
STE4
STE3
STE2
STE1
00h
Bit
Name
R/W
Description
0
STE1
R/W
Enable Smart Tach for Tach 1
1
STE2
R/W
Enable Smart Tach for Tach 2
2
STE3
R/W
Enable Smart Tach for Tach 3
3
STE4
R/W
Enable Smart Tach for Tach 4
4
ZN12_RS
R/W
When this bit is set, the auto fan control will use
0.5˚C of resolution for zones 1 and 2
5
ZN34_RS
R/W
When this bit is set, the auto fan control will use
0.5˚C of resolution for zones 3 and 4
6
RES
R
Reserved
7
RES
R
Reserved
Application Note: Enabling Smart Tach mode is not supported while either PWM output is configured for 22.5 kHz. The behavior
of the part is undefined if this configuration is programmed. Register E0h Special Function TACH to PWM Binding must be setup
when Smart Tach modes are enabled.
16.8.3 Register BEh
GPI/VID Level Control
Register
Address
Read/
Write
Register
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Default
Value
BEh
R/W
GPI/VID
Level Control
GPI7
_LVL
GPI6
_LVL
GPI5
_LVL
GPI4
_LVL
RES
P2_VID
_LVL
P1_VID
_LVL
00h
Bit
Name
R/W
Description
0
P1_VID_LVL
R/W
If set, P1_VIDx inputs use alternate lower V
IH and VIL levels
1
P2_VID_LVL
R/W
If set, P2_VIDx inputs use alternate lower V
IH and VIL levels
3:2
RES
R
Reserved
4
GPI4_LVL
R/W
If set, GPIO4 input use alternate lower V
IH and VIL levels
5
GPI5_LVL
R/W
If set, GPIO5 input use alternate lower V
IH and VIL levels
6
GPI6_LVL
R/W
If set, GPIO6 input use alternate lower V
IH and VIL levels
7
GPI7_LVL
R/W
If set, GPIO7 input use alternate lower V
IH and VIL levels
See the DC Electrical Characteristics for exact V
IH and VIL levels.
www.national.com
63



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