SC5272S-M2 데이터 시트보기 (PDF) - Silan Microelectronics
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SC5272S-M2 Datasheet PDF : 12 Pages
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Silan
Semiconductors
SC5272
PIN DESCRIPTION
Pin No.
18 PIN 20 PIN
Pin Name I/O
Description
Code Address pins No. 0~5. These six tri-state pins are
1~6
1~6
A0~A5
I detected by SC5272 to determine the encoded waveform bit
0 ~bit 5. Each pin can be set to “0”,”1”,”f”(floating).
Code Address pins No.6~11/data pins No.5~0. These six
pins are used higher address input bits or data output pins
depending on the versions of SC5272 used.When these
7~8
10~13
7~8
12~15
pins are used as address pins, they are tri-state input pins
A6/D5~A11/D0 I/O and can be set to “0”,”1”,”f”.When they are used as output
pins, they are driven to Vcc if (1) the address decoded from
the waveform that was received matches the address setting
at address input pins, and (2) the corresponding data bits
received is a “1” bits. Otherwise, they are driven to Vss.
14
16
DIN
I
Data Input Pin. The encode waveform received is serially fed
to SC5272 at this pin.
15
17
16
18
OSC1
OSC2
I Oscillator pin 1
O Oscillator pin 2
A resistor connected between
these two pins determine the
fundamental frequency of SC5272.
17
19
VT
O
Valid Transmission. Active high signal. VT in high state
signifies that SC5272 receives valid transmission waveform.
18
20
Vcc
-- Positive Power Supply
9
9
Vss
-- Negative Power Supply
--
10~11
NC
-- No Connection
FUNCTIONAL DESCRIPTION
The SC5272 decodes the waveform received and fed into the Din pin. The waveform is decoded into code word
that contains the address, data and Sync bits. The decoded address bits are compared with the address set at the
address input pins. If both addresses match for 2 consecutive code words, SC5272 drives:
a). The data output pins whose corresponding data bits is then decoded to be a "1" bit
b). The VT output --to high voltage (high state).
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:
32a
a
OSC
bit "0"
bit "1"
bit "f"
4a
12a
12a
4a
Where: a = oscillating clock period . Bit “ f ” is only available for address bits.
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
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