emc2104 Standard Microsystems Corp., emc2104 Datasheet - Page 40

• Manufacturer Part Number: emc2104
• Description: Emc2104 Dual Rpm-based Pwm Fan Controller With Hardware Thermal Shutdown
• Manufacturer: Standard Microsystems Corp.

Revision 1.74 (05-08-08)
ADDR
3Ch
3Dh
24h
25h
26h
27h
28h
29h
2Ah
2Bh
30h
31h
32h
33h
34h
35h
38h
39h
3Ah
3Bh
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R-C
R-C
R-C
R-C
High Limit Status
External Diode 1
External Diode 2
External Diode 3
External Diode 4
External Diode 1
External Diode 2
External Diode 3
External Diode 4
Low Limit Status
Temp High Limit
Temp High Limit
Temp High Limit
Temp High Limit
Interrupt Enable
Enable Register
Temp Low Limit
Temp Low Limit
Temp Low Limit
Temp Low Limit
Voltage 4 High
Voltage 4 Low
Internal Diode
Internal Diode
Fan Interrupt
PWM Config
Diode Fault
REGISTER
PWM Base
Fan Status
Frequency
High Limit
Low Limit
Register
NAME
Limit
Limit
Table 6.1 EMC2104 Register Set (continued)
Stores the status bits for all temperature
Stores the status bits for all temperature
Stores the status bits for all temperature
Controls the masking of interrupts on all
Controls the masking of interrupts on all
Selects the base frequency for all PWM
Low Limit for External Diode 1 or VIN1
Low Limit for External Diode 2 or VIN2
Low Limit for External Diode 3 or VIN3
High limit for External Diode 1 or VIN1
High limit for External Diode 2 or VIN2
High limit for External Diode 3 or VIN3
High Limit for the Voltage 4 channel
based Fan Speed Control Algorithm
Stores the status bits for the RPM
Low limit for Voltage 4 Channel
Temperature Limit Registers
High Limit for External Diode 4
Low Limit for External Diode 4
High Limit for Internal Diode
Low Limit for Internal Diode
Configures all PWM drivers
temperature channels
DATASHEET
fan related channels
channel diode faults
channel high limits
channel low limits
Dual RPM-Based PWM Fan Controller with Hardware Thermal Shutdown
FUNCTION
drivers.
40
DEFAULT
(+85°C)
(+85°C)
(+85°C)
VALUE
(85°C)
(85°C)
(0.8V)
(0°C)
(0°C)
(0°C)
(0°C)
(0°C)
(0V)
FFh
FFh
00h
00h
00h
00h
00h
00h
00h
55h
55h
55h
55h
55h
00h
00h
00h
00h
00h
00h
LOCK
SWL
SWL
SWL
SWL
SWL
SWL
SWL
SWL
SWL
SWL
SWL
SWL
No
No
No
No
No
No
No
No
SMSC EMC2104
Datasheet
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