emc2105 Standard Microsystems Corp., emc2105 Datasheet - Page 40

• Manufacturer Part Number: emc2105
• Description: Emc2105 Rpm-based High Side Fan Controller With Hardware Thermal Shutdown
• Manufacturer: Standard Microsystems Corp.

Revision 1.74 (05-08-08)
ADDR
3Ch
3Dh
26h
27h
28h
29h
30h
31h
32h
33h
34h
35h
38h
39h
3Ah
3Bh
40h
42h
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
External Diode 1
External Diode 2
External Diode 3
External Diode 4
External Diode 1
External Diode 2
External Diode 3
External Diode 4
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
Configuration 1
Voltage 4 High
Voltage 4 Low
Internal Diode
Internal Diode
Fan Interrupt
Diode Fault
Fan Setting
REGISTER
Fan Status
High Limit
Low Limit
Register
NAME
Limit
Limit
Fan
Table 6.1 EMC2105 Register Set (continued)
Stores the status bits for all temperature
Controls the masking of interrupts on all
Controls the masking of interrupts on all
Algorithm is disabled, allows direct user
based Fan Speed Control Algorithm for
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
Sets configuration values for the RPM
driver input setting for the Fan. If the
High Limit for the Voltage 4 channel
Always displays the most recent fan
based Fan Speed Control Algorithm
Stores the status bits for the RPM
Low limit for Voltage 4 Channel
RPM based Fan Speed Control
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
Fan Control Registers
control of the fan driver.
temperature channels
DATASHEET
fan related channels
channel diode faults
the Fan driver
RPM-Based High Side Fan Controller with Hardware Thermal Shutdown
FUNCTION
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
2Bh
00h
00h
00h
00h
55h
55h
55h
55h
55h
00h
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
SMSC EMC2105
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