EMC2103 Standard Microsystems Corporation, EMC2103 Datasheet - Page 64

• Manufacturer Part Number: EMC2103
• Description: Rpm-based Fan Controller with HW Thermal Shutdown
• Manufacturer: Standard Microsystems Corporation

ADDR
51h
52h
53h
54h
55h
74h
75h
76h
77h
. . .
Revision 0.85 (01-29-08)
6.33
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
. . .
Bit 4 - RPM / PWM - This bit selects the data format for the LUT drive settings.
Bit 2 - TEMP3_CFG - Determine the temperature channel that is used for the Temperature 3 inputs to
the Look Up Table. If the External Diode 3 channel is not enabled, then the Temperature 3 inputs are
not used by the Look Up Table.
Bit 0 - TEMP4_CFG - Determine the temperature channel that is used for the Temperature 4 inputs to
the Look Up Table.
Look Up Table Registers
LUT Temp 3
LUT Temp 4
LUT Temp 3
REGISTER
LUT Drive
LUT Drive
‘0’ (default) - The Look Up Table drive settings are RPM TACH count values for use by the RPM
based Fan Speed Control Algorithm. The Look Up Table drive settings should be loaded highest
value to lowest value (to coincide with the inversion between TACH counts and actual RPM).
‘1’ - The Look Up Table drive settings are PWM duty cycle values and are used directly. The drive
settings should be loaded lowest value to highest value.
‘0’ (default) - The External Diode 3 channel is used by the Fan Look Up Table (if enabled).
‘1’ - The data written into the Pushed Temperature 1 Register is used by the Fan Look Up Table.
‘0’ (default) - The Internal channel is used by the Fan Look Up Table.
‘1’ - The data written into the Pushed Temperature 2 Register is used by the Fan Look Up Table.
Setting 1
Setting 1
Setting 1
Setting 1
Setting 1
Setting 8
Setting 8
Setting 8
Setting 8
LUT Ext
LUT Ext
LUT Ext
LUT Ext
Diode 1
Diode 2
Diode 1
Diode 2
. . .
RPM /
PWM
. . .
‘0’
‘1’
‘0’
‘1’
X
X
X
X
X
X
X
Table 6.49 Look Up Table Registers
4096
4096
128
128
. . .
B7
-
-
-
-
-
-
-
DATASHEET
2048
2048
. . .
B6
64
64
64
64
64
64
64
64
64
64
1024
1024
. . .
B5
32
32
32
32
32
32
32
32
32
RPM-Based Fan Controller with HW Thermal Shutdown
512
512
. . .
B4
16
16
16
16
16
16
16
16
16
256
256
. . .
B3
8
8
8
8
8
8
8
8
8
128
128
. . .
B2
4
4
4
4
4
4
4
4
4
. . .
B1
64
64
2
2
2
2
2
2
2
2
2
. . .
B0
32
32
SMSC EMC2103
1
1
1
1
1
1
1
1
1
Datasheet
DEFAULT
(127°C)
(127°C)
(127°C)
(127°C)
(127°C)
(127°C)
(127°C)
FBh
7Fh
7Fh
7Fh
7Fh
92h
7Fh
7Fh
7Fh
. . .