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
Temperature Registers
LOCK
PAGE
00h
R
Internal Temp
Reading High
Byte
Internal Temp
Reading Low Byte
External Diode 1
Temp Reading
High Byte
External Diode 1
Temp Reading
Low Byte
External Diode 2
Temp Reading
High Byte
External Diode 2
Temp Reading
Low Byte
External Diode 3
Temp Reading
High Byte
External Diode 3
Temp Reading
Low Byte
External Diode 4
Temp Reading
High Byte
External Diode 4
Temp Reading
Low Byte
Critical/Thermal
Shutdown
Temperature
Pushed
Temperature 1
Stores the integer data of the Internal
Diode
Stores the fractional data of the Internal
Diode
Stores the integer data of External
Diode 1 and VIN1 channel
Stores the fractional data of External
Diode 1
Stores the integer data of External
Diode 2 and VIN2 channel
Stores the fractional data of External
Diode 2
Stores the integer data of External
Diode 3 and VIN3 channel
Stores the fractional data of External
Diode 3
Stores the integer data of External
Diode 4
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
Stores the integer data for Pushed
Temperature 1 to drive LUT 1
00h
No
01h
R
00h
No
02h
R
00h
No
03h
R
00h
No
04h
R
00h
No
05h
R
00h
No
06h
R
00h
No
07h
R
00h
No
08h
R
00h
No
09h
R
00h
No
0Ah
R
7Fh
(+127°C)
No
0Ch
R/W
00h
No
Revision 1.74 (05-08-08)
38
SMSC EMC2104
DATASHEET
SMSC [ SMSC CORPORATION ]
