Dual RPM-Based PWM Fan Controller with Hardware Thermal Shutdown
Datasheet
Chapter 6 Register Set
6.1
Register Map
The following registers are accessible through the SMBus Interface. All register bits marked as ‘-’ will
always read ‘0’. A write to these bits will have no effect.
Table 6.1 EMC2104 Register Set
REGISTER
NAME
DEFAULT
VALUE
ADDR
R/W
FUNCTION
LOCK
PAGE
Temperature Registers
Internal Temp
Reading High
Byte
Stores the integer data of the Internal
Diode
00h
01h
02h
R
R
R
00h
00h
00h
No
No
No
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Internal Temp
Reading Low Byte
Stores the fractional data of the Internal
Diode
External Diode 1
Temp Reading
High Byte
Stores the integer data of External
Diode 1 and VIN1 channel
External Diode 1
Temp Reading
Low Byte
Stores the fractional data of External
Diode 1
03h
04h
05h
06h
07h
08h
09h
R
R
R
R
R
R
R
00h
00h
00h
00h
00h
00h
00h
No
No
No
No
No
No
No
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External Diode 2
Temp Reading
High Byte
Stores the integer data of External
Diode 2 and VIN2 channel
External Diode 2
Temp Reading
Low Byte
Stores the fractional data of External
Diode 2
External Diode 3
Temp Reading
High Byte
Stores the integer data of External
Diode 3 and VIN3 channel
External Diode 3
Temp Reading
Low Byte
Stores the fractional data of External
Diode 3
External Diode 4
Temp Reading
High Byte
Stores the integer data of External
Diode 4
External Diode 4
Temp Reading
Low Byte
Stores the fractional data of External
Diode 4
Stores the calculated Critical/Thermal
Shutdown temperature high limit
derived from the voltage on TRIP_SET
/ VIN4
Critical/Thermal
Shutdown
Temperature
7Fh
(+127°C)
0Ah
0Ch
R
No
No
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Pushed
Temperature 1
Stores the integer data for Pushed
Temperature 1 to drive LUT 1
R/W
00h
Revision 1.74 (05-08-08)
SMSC EMC2104
DATA3S8HEET
SMSC [ SMSC CORPORATION ]
