參數(shù)資料
型號(hào)： EMC2103-2-AP-TR
廠商： STANDARD MICROSYSTEMS CORP
元件分類： 模擬信號(hào)調(diào)理
中文描述： SPECIALTY ANALOG CIRCUIT, QCC16
封裝： 4 X 4 MM, ROHS COMPLIANT, QFN-16
文件頁數(shù)： 81/89頁
文件大?。?/td> 1243K
代理商： EMC2103-2-AP-TR
RPM-Based Fan Controller with HW Thermal Shutdown
Datasheet
Revision 0.90 (08-19-08)
82
SMSC EMC2103
DATASHEET
A.2
Example #2
This example uses the RPM based Fan Speed Control Algorithm. The Spin Level (used by the Spin
Up Routine) should be changed to 50% drive for a total Spin Time of 1 second. For all other RPM
configuration settings, the default conditions are used.
For control inputs, it uses the External Diode 1 channel normally, the External Diode 2 channel
normally, and both Pushed Temperature registers in DTS format. The configuration is set as shown in
Table A.5 while Table A.6 shows how the table is loaded.
Note that when using DTS data, the USE_DTS_F1 and / or USE_DTS_F2 bits should be set. The
Pushed Temperature Registers are loaded with the normal DTS values as received by the processor.
When the DTS value is used by the Look Up Table, the value that is stored in the Pushed Temperature
Register is subtracted from a fixed temperature of 100°C. This resultant value is then compared
against the Look Up Table thresholds normally. When programming the Look Up Table, it is necessary
to take this translation into account or else incorrect settings may be selected.
Table A.5 Look Up Table Example #2 Configuration
ADDR
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
SETTING
42h
Fan 1
Configuration
1
EN_
ALGO
RANGE[1:0]
EDGES[1:0]
UPDATE[2:0]
CBh
1
0
101
1
46h
Fan 1 Spin
Up
Configuration
DRIVE_FAIL_CNT1
[1:0]
NOKICK
1
SPIN_LVL[2:0]
SPINUP_TIME
[1:0]
0Ah
0
101
0
50h
LUT 1
Configuration
USE_DT
S_F1
USE_D
TS_F2
LUT_LO
CK
RPM /
PWM
-
TEMP3
_CFG
TEMP
3_CFG
E5h
1
0
010
1
Table A.6 Fan Speed Control Table Example #2
FAN
SPEED
STEP #
EXTERNAL
DIODE 1
TEMPERATURE
(CPU)
EXTERNAL
DIODE 2
TEMPERATURE
(GPU)
PUSHED
TEMPERATURE
SETTING (DTS1)
PUSHED
TEMPERATURE
SETTING (DTS2)
TACH
TARGET
135oC65oC50oC40oC
3Dh
(1007 RPM)
240oC75oC55oC45oC
1Eh
(2048 RPM)
350oC85oC60oC50oC
14h
(3072 RPM)
460oC90oC65oC55oC
0Fh
(4096 RPM)
570oC95oC70oC60oC
0Ch
(5120 RPM)
680oC
100oC75oC65oC
0Ah
(6144 RPM)
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