RPM-Based Fan Controller with HW Thermal Shutdown
Datasheet
Table 6.1 EMC2103 Register Set (continued)
REGISTER
NAME
DEFAULT
VALUE
ADDR
R/W
FUNCTION
LOCK
PAGE
49h
R/W
Fan Valid TACH
Count
Holds the minimum tachometer
reading that indicates the fan is
spinning properly
F5h
SWL
Page 61
4Ah
4Bh
4Ch
4Dh
4Eh
4Fh
R/W
R/W
R/W
R/W
R
Fan 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
00h
F8h
FFh
FFh
F8h
SWL
SWL
No
Page 61
Fan Drive Fail
Band High Byte
TACH Target Low
Byte
Holds the target tachometer reading
low byte for the Fan
Page 62
Page 62
Page 62
Page 62
TACH Target High
Byte
Holds the target tachometer reading
for the Fan
No
TACH Reading
High Byte
Holds the tachometer reading for the
Fan
No
R
TACH Reading
Low Byte
Holds the tachometer reading low
byte for the Fan
No
Look Up Table (LUT)
50h
51h
52h
R/W
R/W
R/W
LUT Configuration Stores and controls the configuration
for the LUT
00h
FBh
No
Page 63
Page 64
Page 64
LUT Drive 1
Stores the lowest programmed drive
setting for the LUT
LUT
Lock
LUT Temp 1
Setting 1
Stores the threshold level for the
External Diode 1 channel that is
associated with the Drive 1 value
7Fh
(127°C)
LUT
Lock
53h
54h
R/W
R/W
LUT Temp 2
Setting 1
Stores the threshold level for the
External Diode 2 channel that is
associated with the Drive 1 value
7Fh
(127°C)
LUT
Lock
Page 64
Page 64
LUT Temp 3
Setting 1
Stores the threshold level for the
External Diode 3 channel (or Pushed
Temp 1 temp) that is associated with
the Drive 1 value
7Fh
(127°C)
LUT
Lock
55h
R/W
LUT Temp 4
Setting 1
Stores the threshold level for the
Internal Diode channel (or Pushed
Temp 2 temp) that is associated with
the Drive 1 value
7Fh
(127°C)
LUT
Lock
Page 64
56h
57h
R/W
R/W
LUT Drive 2
Stores the second programmed drive
setting for the LUT
E6h
LUT
Lock
Page 64
Page 64
LUT Temp 1
Setting 2
Stores the threshold level for the
External Diode 1 channel that is
associated with the Drive 2 value
7Fh
(127°C)
LUT
Lock
58h
59h
R/W
R/W
LUT Temp 2
Setting 2
Stores the threshold level for the
External Diode 2 channel that is
associated with the Drive 2 value
7Fh
(127°C)
LUT
Lock
Page 64
Page 64
LUT Temp 3
Setting 2
Stores the threshold level for the
External Diode 3 channel (or Pushed
Temp 1 temp) that is associated with
the Drive 2 value
7Fh
(127°C)
LUT
Lock
Revision 0.85 (01-29-08)
SMSC EMC2103
DATA3S8HEET
SMSC [ SMSC CORPORATION ]
