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EMC2102 Scheda tecnica(PDF) 39 Page - SMSC Corporation

Il numero della parte EMC2102
Spiegazioni elettronici  RPM-Based Fan Controller with HW Thermal Shutdown
PDF  52 Pages
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Produttore elettronici  SMSC [SMSC Corporation]
Homepage  http://www.smsc.com
Logo SMSC - SMSC Corporation

EMC2102 Scheda tecnica(HTML) 39 Page - SMSC Corporation

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RPM-Based Fan Controller with HW Thermal Shutdown
Datasheet
SMSC EMC2102
39
Revision 1.95 (10-19-06)
DATASHEET
When the Beta Compensation circuitry is disabled, the diode channels will function with default current
levels and will not automatically adjust for beta variation. This mode is used when measuring a discrete
2N3904 transistor or AMD thermal diode.
All of the Beta Configuration Registers are Software Locked.
6.10
REC Configuration Register
The REC Configuration Register determines whether Resistance Error Correction is used for each
external diode channel. The REC Configuration Register is software locked.
If either the External Diode 1 channel or External Diode 3 channel is selected by the SHDN_SEL pin
to be the hardware shutdown input channel (see Table 5.4), then the corresponding RECx bit will be
locked. Writing to the bit will have no affect and reading from it will always report the current setting.
Bit 2 - REC3 - Controls the Resistive Error Correction functionality of External Diode 3
‘0’ - the REC functionality for External Diode 3 is disabled
‘1’ (default) - the REC functionality for External Diode 3 is enabled.
Bit 1 - REC2 - Controls the Resistive Error Correction functionality of External Diode 1
‘0’ - the REC functionality for External Diode 2 is disabled
‘1’ (default) - the REC functionality for External Diode 2 is enabled.
Bit 0 - REC1 - Controls the Resistive Error Correction functionality of External Diode 1
‘0’ - the REC functionality for External Diode 1 is disabled
‘1’ (default) - the REC functionality for External Diode 1 is enabled.
Table 6.13 Beta Compensation Look Up Table
BETAX[2:0]
MINIMUM BETA
21
0
00
0
0.1111
0
0
1
0.1765
01
0
0.25
0
1
1
0.333 (default)
1
0
0
0.4285
10
1
1.0
11
0
2.333
1
1
1
Disabled
Table 6.14 REC Configuration Register
ADDRESS
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
DEFAULT
32h
REC
Configuration
--
--
-REC3
REC2
REC1
07h



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