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
2Ah
2Bh
R/W
R/W
PWM Config
Configures the PWM driver
00h
03h
No
No
Page 52
Page 53
PWM Base
Frequency
Controls the base frequency of the
PWM driver
Temperature Limit Registers
High limit for External Diode 1
30h
31h **
32h **
34h
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
External Diode 1
Temp High Limit
55h
(+85°C)
SWL
SWL
SWL
SWL
SWL
SWL
SWL
SWL
Page 53
Page 53
Page 53
Page 53
Page 53
Page 53
Page 53
Page 53
External Diode 2
Temp High Limit **
High limit for External Diode 2
High limit for External Diode 3
High Limit for Internal Diode
Low Limit for External Diode 1
Low Limit for External Diode 2
Low Limit for External Diode 3
Low Limit for Internal Diode
Fan Control Registers
55h
(+85°C)
External Diode 3
Temp High Limit **
55h
(+85°C)
Internal Diode
High Limit
55h
(85°C)
38h
External Diode 1
Temp Low Limit
00h
(0°C)
39h **
3Ah **
3Ch
External Diode 2
Temp Low Limit **
00h
(0°C)
External Diode 3
Temp Low Limit **
00h
(0°C)
Internal Diode
Low Limit
00h
(0°C)
40h
R/W
Fan Setting
Always displays the most recent fan
driver input setting for Fan. If the
RPM based Fan Speed Control
Algorithm is disabled, allows direct
user control of the fan driver.
00h
No
Page 54
41h
42h
R/W
R/W
PWM Divide
Stores the divide ratio to set the
frequency for the Fan
01h
2Bh
No
No
Page 54
Page 55
Fan Configuration
1
Sets configuration values for the
RPM based Fan Speed Control
Algorithm for the Fan
43h
45h
R/W
R/W
Fan Configuration
2
Sets additional configuration values
for the Fan driver
38h
2Ah
SWL
SWL
Page 56
Page 58
Gain
Holds the gain terms used by the
RPM based Fan Speed Control
Algorithm for the Fan
46h
47h
48h
R/W
R/W
R/W
Fan Spin Up
Configuration
Sets the configuration values for Spin
Up Routine of the Fan driver
19h
10h
SWL
SWL
SWL
Page 58
Page 60
Page 60
Fan Step
Sets the maximum change per
update for the Fan
Fan Minimum
Drive
Sets the minimum drive value for the
the Fan driver
66h
(40%)
SMSC EMC2103
Revision 0.85 (01-29-08)
DATA3S7HEET
SMSC [ SMSC CORPORATION ]
