Silan
Semiconductors
Encoder OSC Frequency
100
R=510kΩ
R=1MΩ
R=2MΩ
R=3.3MΩ
10
R=4.7MΩ
SC5262
Decoder OSC Frequency
1000
R=100kΩ
R=240kΩ
100
R=510kΩ
R=1MΩ
10
R=2MΩ
1
0
3
6
9
12
15
Supply Voltage (V)
1
0
3
6
9
12
15
Supply Voltage (V)
Suggested Oscillator resistor values are shown below:
SC5262
4.7MΩ
3.3MΩ
1.2MΩ
SC5272
820kΩ
680kΩ
200kΩ
2. IR OPERATION
In the IR Type of operation, the functions are similar to the above descriptions except for the output waveform
that has a carrier frequency of 38kHz. Details are as follow.
Code Bits
The Code Bits are further modulated with a 38kHz carrier frequency and can be”0”,”1” or “ f ” bit. Their waveform
are shown below:
160λ
OSC
20λ
"0"
60λ
"1"
"f"
Sync
620λ
Note:λ=2 clock lengths
Code Word
A Code Word is made up of code bits and the format is the same as that of the RF Code Word.
Code Frame
Likewise, a Code Frame is made up of Code Words and the format is the same as that of RF type of operation.
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
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