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EMC2104 Fiches technique(PDF) 41 Page - SMSC Corporation

No de pièce EMC2104
Description  Dual RPM-Based PWM Fan Controller with Hardware Thermal Shutdown
PDF  101 Pages
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Fabricant  SMSC [SMSC Corporation]
Site Internet  http://www.smsc.com
Logo SMSC - SMSC Corporation

EMC2104 Fiches technique(HTML) 41 Page - SMSC Corporation

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Dual RPM-Based PWM Fan Controller with Hardware Thermal Shutdown
Datasheet
SMSC EMC2104
41
Revision 1.74 (05-08-08)
DATASHEET
Fan 1 Control Registers
40h
R/W
Fan 1 Setting
Always displays the most recent fan
driver input setting for Fan 1. If the RPM
based Fan Speed Control Algorithm is
disabled, allows direct user control of
the fan driver.
00h
No
Page 64
41h
R/W
PWM 1 Divide
Stores the divide ratio to set the
frequency for Fan 1
01h
No
Page 64
42h
R/W
Fan 1
Configuration 1
Sets configuration values for the RPM
based Fan Speed Control Algorithm for
the Fan 1 driver
2Bh
No
Page 65
43h
R/W
Fan 1
Configuration 2
Sets additional configuration values for
the Fan 1 driver
38h
SWL
Page 67
45h
R/W
Gain 1
Holds the gain terms used by the RPM
based Fan Speed Control Algorithm for
the Fan 1 driver
2Ah
SWL
Page 69
46h
R/W
Fan 1 Spin Up
Configuration
Sets the configuration values for Spin
Up Routine of the Fan 1 driver
19h
SWL
Page 69
47h
R/W
Fan 1 Step
Sets the maximum change per update
for the Fan 1 driver
10h
SWL
Page 71
48h
R/W
Fan 1 Minimum
Drive
Sets the minimum drive value for the
Fan 1 driver
66h
(40%)
SWL
Page 72
49h
R/W
Fan 1 Valid TACH
Count
Holds the minimum tachometer reading
that indicates the fan is spinning
properly
F5h
SWL
Page 72
4Ah
R/W
Fan 1 Drive Fail
Band Low Byte
Stores the number of Tach counts used
to determine how the actual fan speed
must match the target fan speed at full
scale drive
00h
SWL
Page 73
4Bh
R/W
Fan 1 Drive Fail
Band High Byte
00h
SWL
4Ch
R/W
TACH 1 Target
Low Byte
Holds the target tachometer reading low
byte Fan 1
F8h
No
Page 73
4Dh
R/W
TACH 1 Target
High Byte
Holds the target tachometer reading
high byte for Fan 1
FFh
No
Page 73
4Eh
R
TACH 1 Reading
High Byte
Holds the tachometer reading high byte
for Fan 1
FFh
No
Page 74
4Fh
R
TACH 1 Reading
Low Byte
Holds the tachometer reading low byte
for Fan 1
F8h
No
Page 74
Look Up Table 1 (LUT1)
50h
R/W
LUT 1
Configuration
Stores and controls the configuration for
LUT 1
00h
No
Page 75
51h
R/W
LUT 1 Drive 1
Stores the lowest programmed drive
setting for LUT 1
FBh
LUT
Lock 1
Page 76
Table 6.1 EMC2104 Register Set (continued)
ADDR
R/W
REGISTER
NAME
FUNCTION
DEFAULT
VALUE
LOCK
PAGE



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