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參數(shù)資料
| 型號： | SC5272S-M4 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | REMOTE CONTROL DECODER |
| 中文描述： | 遙控解碼器 |
| 文件頁數(shù)： | 5/12頁 |
| 文件大小： | 180K |
| 代理商： | SC5272S-M4 |
Silan
Semiconductors
SC5272
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0
2000.12.31
5
The Synchronous bit waveform is 4 bits long with 1/8 bit width pulse. Please refer to the diagram below:
1/8 bit width=4a
4 bit width=128a
Note: 1bit =32a
Code word
A group of Code Bits is called a Code Word. A Code Word consists of 12 AD bits followed by one Sync. Bit. The
12 AD bits are interpreted as either address or data bits depending on the SC5272 version used. Please refer to
the diagram below:
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
SYNC
Single Resistor Oscillator
The Build-in oscillator circuitry of SC5272 allows a precision oscillator to be constructed by connecting an
external resistor between OSC1 and OSC2 pins. For SC5272 to decode correctly the received waveform, the
oscillator frequency of SC5272 must be 2.5 ~8 times that of transmitting SC5262. It is a good practice to center the
SC5272 oscillator frequency in the window to gain best window margin at both sides. The typical oscillator
frequency with various resistor values for both SC5262 and SC5272 are shown below:
0
3
6
9
12
15
1
10
100
Supply Voltage (V)
F
Encoder OSC Frequency
0
3
6
9
12
15
1
10
1000
Supply Voltage (V)
F
Decoder OSC Frequency
100
R=510k
R=1M
R=3.3M
R=4.7M
R=100k
R=240k
R=510k
R=1M
R=2M
R=2M
Suggested Oscillator resistor values are shown below:
4.7M
820k
3.3M
1.2M
680k
200k
SC5262
SC5272
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