SM5221-001 参数 Datasheet PDF下载

三合微科股�½有限公司

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AM

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Microelectronics Corp.

SM5221-001/002

32 KEYS ENCODER

TRANSMISSION CODE

(1) DOUT Output

The transmission code consists of a leader code, 16-bit custom code, and 8-bit data code.

The inverse code of the data code is also sent simultaneously, giving a total configuration

of 32 bits per transmission.

C0 C1 C2 C3 C4 C5 C6 C7 C0' C1' C2' C3' C4' C5' C6' C7' D0 D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 D6 D7

Leader

Code

Custom Code

Custom Code'

Data Code

Data Code

DOUT Output Code

The leader code consists of a 9 ms carrier waveform plus a 4.5 ms OFF waveform, and is

used as the leader for the following code. The code uses the PPM (Pulse Position

Modulation) method, with "1" and "0" differentiated by the time between pulses reference

following diagram. Each code consists of 8 bits, and simultaneous transmission of the

inverse code.

9 ms

4.5 ms

Custom Code'

Custom Code

8 bits

8 bits

18 ms to 36 ms

58.5 to 76.5 ms

Data Code

8 bits

Data Code

8 bits

13.5 ms

Leader

Code

0.56 ms

0.56 ms

2.25 ms

Bit 1

1.125 ms

Bit 0

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V.2.0 Mar 8,2002