RPM-Based Fan Controller with Multiple Temperature Zones & Hardware Thermal Shutdown
Datasheet
Table 7.1 EMC2113 Register Set (continued)
REGISTER
NAME
DEFAULT
VALUE
ADDR
R/W
FUNCTION
LOCK
PAGE
29h
R/W
Fan Interrupt
Enable Register
Controls the masking of interrupts for
the Fan Driver
00h
00h
00h
No
Page 55
2Ah
2Bh
R/W
R/W
PWM Driver
Config
Configures the PWM driver
No
No
Page 56
Page 56
PWM Driver Base
Frequency
Controls the base frequency of the
PWM driver
Temperature High Limit Registers
High limit for External Diode 1
30h
31h
32h
34h
R/W
R/W
R/W
R/W
External Diode 1
Temp High Limit
55h
(+85°C)
SWL
SWL
SWL
SWL
Page 57
Page 57
Page 57
Page 57
External Diode 2
Temp High Limit
High limit for External Diode 2
High limit for External Diode 3
High Limit for Internal Diode
55h
(+85°C)
External Diode 3
Temp High Limit
55h
(+85°C)
Internal Diode
High Limit
55h
(85°C)
Temperature Low Limit Registers
Low Limit for External Diode 1
38h
39h
3Ah
3Ch
R/W
R/W
R/W
R/W
External Diode 1
Temp Low Limit
00h
(0°C)
SWL
SWL
SWL
SWL
Page 57
Page 57
Page 57
Page 57
External Diode 2
Temp Low Limit
Low Limit for External Diode 2
Low Limit for External Diode 3
Low Limit for Internal Diode
PWM Input Duty Cycle Limit
00h
(0°C)
External Diode 3
Temp Low Limit
00h
(0°C)
Internal Diode
Low Limit
00h
(0°C)
3Dh
40h
R/W
R/W
PWM Input Duty
Cycle High Limit
Stores the high limit for the PWM
input Duty Cycle
7Fh
00h
SWL
No
Page 57
Page 58
Fan Control Registers
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.
41h
42h
R/W
R/W
PWM Divide
Stores the divide ratio to set the
frequency for the Fan
01h
2Bh
No
No
Page 58
Page 58
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
28h
2Ah
SWL
SWL
Page 60
Page 62
Gain
Holds the gain terms used by the
RPM-based Fan Speed Control
Algorithm for the Fan
SMSC EMC2113
Revision 1.2 (10-08-09)
DATA3S9HEET
SMSC [ SMSC CORPORATION ]
