Dual RPM-Based PWM Fan Controller with Hardware Thermal Shutdown
Datasheet
Table 6.1 EMC2104 Register Set (continued)
REGISTER
NAME
DEFAULT
VALUE
ADDR
R/W
FUNCTION
LOCK
PAGE
Stores the status bits for all temperature
channel high limits
24h
R-C
High Limit Status
Low Limit Status
Diode Fault
00h
00h
00h
00h
00h
No
Page 59
Stores the status bits for all temperature
channel low limits
25h
26h
27h
28h
R-C
R-C
R-C
R/W
No
No
No
No
Page 59
Page 59
Page 60
Page 60
Stores the status bits for all temperature
channel diode faults
Stores the status bits for the RPM
based Fan Speed Control Algorithm
Fan Status
Interrupt Enable
Register
Controls the masking of interrupts on all
temperature channels
Fan Interrupt
Enable Register
Controls the masking of interrupts on all
fan related channels
29h
2Ah
2Bh
R/W
R/W
R/W
00h
00h
FFh
No
No
No
Page 61
Page 62
Page 62
PWM Config
Configures all PWM drivers
PWM Base
Frequency
Selects the base frequency for all PWM
drivers.
Temperature Limit Registers
External Diode 1
Temp High Limit
55h
(+85°C)
30h
31h
32h
33h
34h
35h
38h
39h
3Ah
3Bh
3Ch
3Dh
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
High limit for External Diode 1 or VIN1
SWL
SWL
SWL
SWL
SWL
SWL
SWL
SWL
SWL
SWL
SWL
SWL
Page 63
Page 63
Page 63
Page 63
Page 63
Page 63
Page 63
Page 63
Page 63
Page 63
Page 63
Page 63
External Diode 2
Temp High Limit
55h
(+85°C)
High limit for External Diode 2 or VIN2
High limit for External Diode 3 or VIN3
High Limit for External Diode 4
External Diode 3
Temp High Limit
55h
(+85°C)
External Diode 4
Temp High Limit
55h
(85°C)
Internal Diode
High Limit
55h
(85°C)
High Limit for Internal Diode
Voltage 4 High
Limit
FFh
(0.8V)
High Limit for the Voltage 4 channel
Low Limit for External Diode 1 or VIN1
Low Limit for External Diode 2 or VIN2
Low Limit for External Diode 3 or VIN3
Low Limit for External Diode 4
External Diode 1
Temp Low Limit
00h
(0°C)
External Diode 2
Temp Low Limit
00h
(0°C)
External Diode 3
Temp Low Limit
00h
(0°C)
External Diode 4
Temp Low Limit
00h
(0°C)
Internal Diode
Low Limit
00h
(0°C)
Low Limit for Internal Diode
Voltage 4 Low
Limit
00h
(0V)
Low limit for Voltage 4 Channel
Revision 1.74 (05-08-08)
SMSC EMC2104
DATA4S0HEET
SMSC [ SMSC CORPORATION ]
