emc2104 Standard Microsystems Corp., emc2104 Datasheet - Page 96

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

Example 1:
Example 2:
Example 3:
Revision 1.74 (05-08-08)
STEP #
SPEED
FAN
7
8
TEMPERATURE
EXTERNAL DIODE
1 TEMPERATURE
EXTERNAL
DIODE 1
Note: The values shown in
Table B.10 Fan Speed Determination for Example #3 (using settings in
(CPU)
75°C
75°C
75°C
100
(CPU)
90
o
programmable via SMBus.
o
C
C
Table B.9 Fan Speed Control Table Example #3 (continued)
TEMPERATURE
EXTERNAL
TEMPERATURE
DIODE 2
97.25°C
(GPU)
75°C
90°C
EXTERNAL
DIODE 2
(GPU)
105
110
o
o
C
C
Table B.9
DATASHEET
(translated as 65°C)
(translated as 70°C)
Dual RPM-Based PWM Fan Controller with Hardware Thermal Shutdown
TEMPERATURE
(translated as
are example settings. All the cells in the look-up table are
SETTING (DTS1)
TEMPERATURE
96
PUSHED
(DTS1)
85°C)
15°C
35°C
30°C
PUSHED
80
85
o
o
C
C
(translated as 50°C)
(translated as 80°C)
TEMPERATURE
(translated as
SETTING (DTS2)
TEMPERATURE
PUSHED
(DTS2)
95°C)
50°C
20°C
PUSHED
5°C
100
80
o
o
C
C
Table
B.9)
CPU requires highest
SETTING RESULT
0Ch (5120 RPM) -
08h (7680 RPM) -
09h (6826 RPM) -
SMSC EMC2104
(6826 RPM)
(7680 RPM)
DTS1 requires
DTS2 requires
highest target
highest target
TARGET
FAN DRIVE
TACH
09h
08h
target
Datasheet