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SC5262 Datasheet(PDF) 3 Page - Silan Microelectronics Joint-stock

Part No. SC5262
Description  REMOTE CONTROL ENCODER
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Manufacturer  SILAN [Silan Microelectronics Joint-stock]
Direct Link  http://www.silan.com.cn
Logo SILAN - Silan Microelectronics Joint-stock

SC5262 Datasheet(HTML) 3 Page - Silan Microelectronics Joint-stock

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Silan
Semiconductors
SC5262
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0
2000.12.31
3
PIN DESCRIPTION
Pin No.
18 PIN
20 PIN
Pin Name
I/O
Description
1~6
1~6
A0~A5
I
Code Address pins No. 0~5. These six tri-state pins are
detected by SC5262 to determine the encoded waveform
bit 0 ~bit 5. Each pin can be set to “0”,”1”,”f”(floating).
7~8
10~13
7~8
12~15
A6/D5~A11/D0
I
Code Address pinsNo.6~11/data pins No.5~0. These six
tri-state pins are detected by SC5262 to determine the
encoded waveform bit 6 ~bit 11.When these pins are used
as address pins, they can be set to “0”,”1”,”f”.When they
are used as data pins ,they can be set only to “0”,”1”.
14
16
TE
I
Transmission Enable. Active Low Signal.SC5262 outputs
the encoded waveform to DOUT when this pins is pulled to
LOW.
15
17
OSC1
O
Oscillator Pin No.1
16
18
OSC2
I
Oscillator Pin No.2
A resistor connected between
these two pins determine the
fundamental frequency of SC5262.
17
19
DOUT
O
Data Output Pin. The encoded waveform is serially
outputted to this pin. When SC5262 is not transmitting,
DOUT outputs low(Vss) voltage.
18
20
Vcc
--
Positive Power Supply
9
9
Vss
--
Negative Power Supply
--
10~11
NC
--
Not Connected
FUNCTIONAL DESCRIPTION
The SC5262 encodes the code address and data set at A0~ A5 and A6/D5 ~ A11/D0 into a special waveform
and outputs it to the Dout when TE is pulled to “0” (Low state). This waveform is fed to either the RF modulator or
the IR transmitter for transmission. The Transmitted radio frequency or infrared ray is received by the RF
demodulator or IR receiver and reshaped to the special waveform. SC5272 is then used to decode the waveform
and set the corresponding output pins. Thus completing a remote control encoding and decoding function.
1. RF OPERATION
Code Bits
A code bit is the basic component of the encoded waveform, and can be classified as either an AD(Address/Data)
Bit or a SYNC(Synchronous) Bit.
An AD bit can be designated as bit “ 0 ”, “ 1 ” or “ f ” if it is in low, high or floating state respectively. One bit
waveform consists of two pulse cycles. Each pulse cycle has 16 oscillating time periods. For further details, please
refer to the diagram below:
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


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