emc2104 Standard Microsystems Corp., emc2104 Datasheet - Page 52

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

ADDR
ADDR
0Ch
0Dh
10h
0Eh
0Fh
Revision 1.74 (05-08-08)
6.4
6.5
R/W
R/W
R/W
R/W
R/W
R/W
R
TEMPERATURE (°C)
The Pushed Temperature Registers store user programmed temperature values that can be used by
the look-up table to update the fan control algorithm. Data written in these registers is not compared
against any limits and must match the data format shown in
The Voltage Registers hold the data read from the TRIP_SET voltage input. The TRIP_SET voltage is
stored whether the TRIP_SET is used to set the Thermal / Critical Shutdown temperature or configured
to act as the VIN4 input.
Each bit weight represents mV of resolution so that the final voltage can be determined by adding the
appropriately set bits together.
Pushed Temperature Registers
Voltage Registers
Temperature 1
Temperature 2
Temperature 3
Temperature 4
Voltage / VIN4
REGISTER
REGISTER
TRIP_SET
Pushed
Pushed
Pushed
Pushed
Voltage
127
130
150
65
Table 6.5 Critical / Thermal Shutdown Data Format (continued)
Sign
Sign
Sign
Sign
Table 6.6 Pushed Temperature Register
B7
400
B7
Table 6.7 TripSet Voltage Register
200
B6
64
64
64
64
B6
DATASHEET
Dual RPM-Based PWM Fan Controller with Hardware Thermal Shutdown
B5
100
32
32
32
32
B5
52
0100_0001b
1000_0010b
1001_0110b
0111_1111b
BINARY
B4
16
16
16
16
B4
50
B3
B3
Table
25
8
8
8
8
6.3.
13.5
B2
B2
4
4
4
4
6.25
B1
B1
2
2
2
2
HEX
7Fh
41h
82h
96h
SMSC EMC2104
3.125
B0
B0
1
1
1
1
Datasheet
DEFAULT
DEFAULT
00h
00h
00h
00h
FFh