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SC5262 Datasheet(PDF) 4 Page - Silan Microelectronics Joint-stock

Part No. SC5262
Description  REMOTE CONTROL ENCODER
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Maker  SILAN [Silan Microelectronics Joint-stock]
Homepage  http://www.silan.com.cn
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Silan
Semiconductors
SC5262
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0
2000.12.31
4
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 determined by the corresponding states of A0~A5 and A6/D5 ~ A11/D0 pins at the time of
transmission. When Data Type of SC5262 is used , the address bits will decrease accordingly. For example, in the
3 Data Type where the address has 9 bits, the transmitting format is:
9 address bits
3 Data bits
Sync. Bit
SC5262/SC5272 has a maximum of 12 Address Bits including the 6 Address/Data bits. The following diagram
shows the code bits with their corresponding pins.
A0
A1
A2
A3
A4
A5
A6
/D5
A7
/D4
A8
/D3
A9
/D2
A10
/D1
A11
/D0
0 Data
A0A1
A2
A3
A4A5A6A7A8A9
A10
A11
Sync
1 Data
A0A1
A2
A3
A4A5A6A7A8A9
A10
D0
Sync
2 Data
A0A1
A2
A3
A4A5A6A7A8A9
D1
D0
Sync
3 Data
A0A1
A2
A3
A4A5A6A7A8D2
D1
D0
Sync
4 Data
A0A1
A2
A3
A4A5A6A7D3
D2
D1
D0
Sync
5 Data
A0A1
A2
A3
A4A5A6D4
D3
D2
D1
D0
Sync
6 Data
A0A1
A2
A3
A4A5D5
D4
D3
D2
D1
D0
Sync
The Code Bits A0~A5 and A6/D5 ~ A11/D0 are determined by the states of A0 ~ A5 and A6/D5 ~A11/D0 pins.
For example, when the A0(pin 1) is set to “ 1 ”(Vcc), the code bit A0 is synthesized as “ 1 ” bit. In the same manner,
when it (A0 pin) is set to “ 0 ”( Vss) or left floating, the Code Bit A0 is synthesized as a “ 0 ” or “ f ” bit respectively.
Code Frame
A Code Frame consists of 4 continuous code Words. When SC5262 detects “0” on the TE (meaning , the TE
is active “low”), it outputs a Code frame at Dout. If TE is still active at the time the Code Frame transmission ends.
SC5262 outputs another Code Frame. It should be noted that the Code Frame is synthesized at the time of
transmission.
TE
Dout
1 frame(=4 word)
1frame
1frame
Single Resistor Oscillator
The Build-in oscillator circuitry of SC5262 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. The typical oscillator frequency
with various resistor values for both SC5262 and SC5272 are shown below:




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