EMC2103 Standard Microsystems Corporation, EMC2103 Datasheet - Page 77

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

RPM-Based Fan Controller with HW Thermal Shutdown
Datasheet
SMSC EMC2103
ADDR
Example 1:
Example 2:
Example 3:
STEP #
50h
SPEED
FAN
1
2
3
4
5
6
7
8
Configuration
REGISTER
EXTERNAL DIODE
1 TEMPERATURE
LUT 1
Note: The values shown in
TEMPERATURE
Table A.4 Fan Speed Determination for Example #1 (using settings in
EXTERNAL
DIODE 1
(CPU)
100
35
40
50
60
70
80
90
(CPU)
82°C
82C°
82°C
programmable via SMBus.
o
o
o
o
o
o
o
o
C
C
C
C
C
C
C
C
USE_D
TS_F1
B7
0
Table A.2 Look Up Table Example #1 Configuration
Table A.3 Fan Speed Control Table Example #1
TEMPERATURE
TEMPERATURE
EXTERNAL
DIODE 2
EXTERNAL
(GPU)
97°C
USE_D
82°C
97°C
DIODE 2
TS_F2
(GPU)
100
B6
60
70
75
80
85
90
95
0
o
o
o
o
o
o
o
o
C
C
C
C
C
C
C
Table A.3
C
DATASHEET
LUT_L
OCK
B5
1
TEMPERATURE
are example settings. All the cells in the look-up table are
EXTERNAL DIODE
3 TEMPERATURE
EXTERNAL
DIODE 3
77
(SKIN)
62°C
48°C
62°C
RPM /
PWM
B4
(SKIN)
1
30
35
40
45
50
55
60
65
o
o
o
o
o
o
o
o
C
C
C
C
C
C
C
C
B3
0
-
INTERNAL DIODE
TEMPERATURE
(AMBIENT)
TEMP3
_CFG
INTERNAL DIODE
75°C
58°C
58°C
B2
TEMPERATURE
0
(AMBIENT)
40
45
50
55
60
65
70
75
o
o
o
o
o
o
o
o
B1
0
C
C
C
C
C
C
C
C
-
Table
requires highest drive)
requires highest drive)
require highest drive)
80% (GPU and Skin
100% (Internal temp
Revision 0.85 (01-29-08)
TEMP4
_CFG
A.3)
70% (CPU temp
B0
0
PWM RESULT
SETTINGS
100%
PWM
30%
40%
50%
60%
70%
80%
SETTING
0%
C0h