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參數(shù)資料
| 型號： | ASC7611 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | HARDWARE MONITOR WITH INTEGRATED FAN CONTROL |
| 中文描述： | 五金顯示器整合了風(fēng)扇控制 |
| 文件頁數(shù)： | 20/40頁 |
| 文件大?。?/td> | 505K |
| 代理商： | ASC7611 |
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Andigilog, Inc. 2006
www.andigilog.com
October 2006 - 70A05007
aSC7611
Register 04-07h: Fan Tachometer Measurement Configuration
Register
Address
Read/
Write
Register
Name
Bit 7
(MSB)
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
(LSB)
Default
Value
04h
R/W
Tach 1
Configuration
3-Wire
Enable1
3-Wire
Enable0
Meas
Blank 1
Meas
Blank 0
Meas
Dwell 1
Meas
Dwell 0
Meas
Duration
1
Meas
Duration
0
36
05h
R/W
Tach 2
Configuration
3-Wire
Enable1
3-Wire
Enable0
Meas
Blank 1
Meas
Blank 0
Meas
Dwell 1
Meas
Dwell 0
Meas
Duration
1
Meas
Duration
0
36
06h
R/W
Tach 3
Configuration
3-Wire
Enable1
3-Wire
Enable0
Meas
Blank 1
Meas
Blank 0
Meas
Dwell 1
Meas
Dwell 0
Meas
Duration
1
Meas
Duration
0
36
07h
R/W
Tach 4
Configuration
3-Wire
Enable1
3-Wire
Enable0
Meas
Blank 1
Meas
Blank 0
Meas
Dwell 1
Meas
Dwell 0
Meas
Duration
1
Meas
Duration
0
36
The Fan Tachometer Configuration registers contain the settings that define the modes of measurement of the Tachometer
input signals. The user is allowed to disable a tachometer measurement or to request PWM stretching, in the case of a 3-
wire fan. Also, the rate, start-up and period of measurements within a fan rotation cycle may be selected. The table below
describes the controls.
Bit
Name
R/W
Default
Description
1:0
Measurement
Duration
R/W
10
The amount of fan rotation used for the tach measurement.
Assumes 2 pulse periods per rotation of fan.
00: Rotation – Tach Count x4 = Reported Valu
01: Rotation – Tach Count x2 = Reported Value
10: 1 Rotation – Tach Count x1 = Reported Value (default)
11: 2 Rotation – Tach Count x1 = Reported Value
3:2
Measurement
Dwell
R/W
01
Delay between Tach Measurements
00: 100 ms
01: 300 ms (default)
10: 500 ms
11: 728 ms
5:4
Measurement
Blank
R/W
11
In 3-wire fan mode, a delay is needed to assure that the tach
input has stabilized after the PWM has been set to 100%
00: 11.1 μs
01: 22.2 μs
10: 33.3 μs
11: 44.4 μs (default)
7:6
3-Wire Enable
R/W
00
For 3-Wire mode, the PWM output will be forced to 100% when
the tach measurement is being processed. Each fan has a 3-
Wire Mode control that will behave as indicated in this table:
HLFRQ
(5Fh-61h)
3-Wire Enable (7:6)
3-Wire
Mode
0
0
0
Enabled
0
0
1
Enabled
0
1
0
Enabled
0
1
1
Disabled
1
0
0
Disabled
1
1
0
1
1
0
Disabled
Enabled
1
1
1
Disabled
Table 6 Tachometer Configuration Register
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