EMC2103 Standard Microsystems Corporation, EMC2103 Datasheet - Page 79

• Manufacturer Part Number: EMC2103
• Description: Rpm-based Fan Controller with HW Thermal Shutdown
• Manufacturer: Standard Microsystems Corporation

Example 1:
Example 2:
Example 3:
RPM-Based Fan Controller with HW Thermal Shutdown
Datasheet
SMSC EMC2103
STEP #
SPEED
FAN
7
8
TEMPERATURE
TEMPERATURE
EXTERNAL
Note: The values shown in
DIODE 1
EXTERNAL
Table A.7 Fan Speed Determination for Example #2 (using settings in
(CPU)
75°C
DIODE 1
75°C
75°C
(CPU)
100
90
o
o
programmable via SMBus.
C
C
Table A.6 Fan Speed Control Table Example #2 (continued)
TEMPERATURE
EXTERNAL
TEMPERATURE
DIODE 2
97.25°C
EXTERNAL
(GPU)
75°C
90°C
DIODE 2
(GPU)
105
110
o
o
C
C
Table A.6
DATASHEET
(translated as 65°C)
(translated as 70°C)
TEMPERATURE
(translated as
SETTING (DTS1)
are example settings. All the cells in the look-up table are
TEMPERATURE
PUSHED
79
(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
Revision 0.85 (01-29-08)
A.6)
CPU requires highest
0Ch (5120 RPM) -
08h (7680 RPM) -
09h (6826 RPM) -
PWM RESULT
(6826 RPM)
(7680 RPM)
DTS1 requires
DTS2 requires
highest target
highest target
TARGET
TACH
09h
08h
target