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參數(shù)資料
| 型號： | EMC2103-2-AP-TR |
| 廠商： | STANDARD MICROSYSTEMS CORP |
| 元件分類： | 模擬信號調(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)： | 58/89頁 |
| 文件大?。?/td> | 1243K |
| 代理商： | EMC2103-2-AP-TR |
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RPM-Based Fan Controller with HW Thermal Shutdown
Datasheet
SMSC EMC2103
61
Revision 0.90 (08-19-08)
DATASHEET
Bit 2 - 1 - ERR_RNG[1:0] - Control some of the advanced options that affect the error window. When
the measured fan speed is within the programmed error window around the target speed, then the fan
drive setting is not updated. The algorithm will continue to monitor the fan speed and calculate
necessary drive setting changes based on the error, however these changes are ignored.
The Fan Configuration 2 Register is Software Locked.
6.24
Gain Register
The Gain Register stores the gain terms used by the proportional and integral portions of the RPM
based Fan Speed Control Algorithm. These terms will affect the FSC closed loop acquisition,
overshoot, and settling as would be expected in a classic PID system.
Table 6.35 Derivative Options
DER_OPT[1:0]
OPERATION
10
0
No derivative terms used
01
Basic derivative. The derivative of the error from
the current drive setting and the target is added
to the iterative Fan Drive setting (in addition to
proportional and integral terms)
10
Step derivative. The derivative of the error from
the current drive setting and the target is added
to the iterative Fan Drive setting and is not
capped by the maximum Fan Step Register
setting.
11
Both the basic derivative and the step derivative
are used effectively causing the derivative term to
have double the effect of the derivative term
(default).
Table 6.36 Error Range Options
ERR_RNG[1:0]
OPERATION
10
0
0 RPM (default)
0
1
50 RPM
1
0
100 RPM
1
200 RPM
Table 6.37 Gain Register
ADDR
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
DEFAULT
45h
R/W
Gain Register
-
GAIND[1:0]
GAINI[1:0]
GAINP[1:0]
2Ah
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| EMC2103-3-KP | 制造商:SMSC 制造商全稱:SMSC 功能描述:RPM-Based Fan Controller with HW Thermal Shutdown |
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