SC5262 데이터 시트보기 (PDF) - Silan Microelectronics

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SC5262

REMOTE CONTROL ENCODER

Silan Microelectronics 

Silan

Semiconductors

SC5262

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 A7 A8 A9 A10 A11

/D5 /D4 /D3 /D2 /D1 /D0

0 Data A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 Sync

1 Data A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 D0 Sync

2 Data A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 D1 D0 Sync

3 Data A0 A1 A2 A3 A4 A5 A6 A7 A8 D2 D1 D0 Sync

4 Data A0 A1 A2 A3 A4 A5 A6 A7 D3 D2 D1 D0 Sync

5 Data A0 A1 A2 A3 A4 A5 A6 D4 D3 D2 D1 D0 Sync

6 Data A0 A1 A2 A3 A4 A5 D5 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

1 frame(=4 word)

Dout

1 frame

1 frame

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:

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.0 2000.12.31

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