参数资料
型号: EMC2103-1-KP-TR
厂商: STANDARD MICROSYSTEMS CORP
元件分类: 模拟信号调理
中文描述: SPECIALTY ANALOG CIRCUIT, QCC12
封装: 4 X 4 MM, ROHS COMPLIANT, QFN-12
文件页数: 83/89页
文件大小: 1243K
代理商: EMC2103-1-KP-TR
RPM-Based Fan Controller with HW Thermal Shutdown
Datasheet
Revision 0.90 (08-19-08)
84
SMSC EMC2103
DATASHEET
Appendix B RPM to Tachometer Count Look Up Tables
B.1
1k RPM Range
The Look Up Table is an example based on the assumption that the fan being measured has 2-poles
and is measuring 5 edges using the 1k RPM range settings. The data presented in the reading is only
the high byte data and the decimal count value only represents high byte data.
Table B.1 Tachometer Count to RPM Look Up Table (Range = 1000 RPM)
TACH COUNT
(DECIMAL)
REGISTER
READING (HEX)
FAN SPEED
(RPM)
TACH COUNT
(DECIMAL)
REGISTER
READING
(HEX)
FAN SPEED
(RPM)
0
00
Disabled
4096
80
1920
32
01
245760
4128
81
1905
64
02
122880
4160
82
1890
96
03
81920
4192
83
1876
128
04
61440
4224
84
1862
160
05
49152
4256
85
1848
192
06
40960
4288
86
1834
224
07
35109
4320
87
1820
256
08
30720
4352
88
1807
288
09
27307
4384
89
1794
320
0A
24576
4416
8A
1781
352
0B
22342
4448
8B
1768
384
0C
20480
4480
8C
1755
416
0D
18905
4512
8D
1743
448
0E
17554
4544
8E
1731
480
0F
16384
4576
8F
1719
512
10
15360
4608
90
1707
544
11
14456
4640
91
1695
576
12
13653
4672
92
1683
608
13
12935
4704
93
1672
640
14
12288
4736
94
1661
672
15
11703
4768
95
1649
704
16
11171
4800
96
1638
736
17
10685
4832
97
1628
768
18
10240
4864
98
1617
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