emc2105 Standard Microsystems Corp., emc2105 Datasheet - Page 82

• Manufacturer Part Number: emc2105
• Description: Emc2105 Rpm-based High Side Fan Controller With Hardware Thermal Shutdown
• Manufacturer: Standard Microsystems Corp.

Example 1:
Example 2:
Example 3:
ADDR
50h
Revision 1.74 (05-08-08)
STEP #
SPEED
FAN
1
2
3
4
5
6
7
8
Configuration
REGISTER
TEMPERATURE
LUT 1
EXTERNAL
TEMPERATURE
Note: The values shown in
DIODE 1
Table B.4 Fan Speed Determination for Example #1 (using settings in
EXTERNAL
(CPU)
82°C
82C°
82°C
DIODE 1
(CPU)
100
35
40
50
60
70
80
90
o
o
o
o
o
o
o
programmable via SMBus.
o
C
C
C
C
C
C
C
C
USE_D
TS_F1
B7
0
Table B.2 Look Up Table Example #1 Configuration
TEMPERATURE
Table B.3 Fan Speed Control Table Example #1
EXTERNAL
TEMPERATURE
DIODE 2
USE_D
TS_F2
(GPU)
EXTERNAL
97°C
82°C
97°C
B6
DIODE 2
0
(GPU)
100
60
70
75
80
85
90
95
o
o
o
o
o
o
o
o
C
C
C
C
C
C
C
C
Table B.3
LUT_L
OCK
B5
DATASHEET
1
EXTERNAL DIODE
RPM-Based High Side Fan Controller with Hardware Thermal Shutdown
3 TEMPERATURE
are example settings. All the cells in the look-up table are
TEMPERATURE
82
TACH /
DRIVE
EXTERNAL
(SKIN)
B4
62°C
DIODE 3
48°C
62°C
1
(SKIN)
30
35
40
45
50
55
60
65
o
o
o
o
o
o
o
o
C
C
C
C
C
C
C
C
TEMP3_CFG
B3
0
[1:0]
INTERNAL DIODE
TEMPERATURE
INTERNAL DIODE
0
TEMPERATURE
(AMBIENT)
B2
(AMBIENT)
75°C
58°C
58°C
40
45
50
55
60
65
70
75
o
o
o
o
o
o
o
o
C
C
C
C
C
C
C
C
TEMP4_CFG
B1
Table
0
[1:0]
B.3)
requires highest drive)
requires highest drive)
0
require highest drive)
80% (GPU and Skin
100% (Internal temp
SETTING RESULT
B0
70% (CPU temp
SMSC EMC2105
FAN DRIVE
SETTINGS
FAN DRIVE
100%
30%
40%
50%
60%
70%
80%
0%
Datasheet
SETTING
C0h