Silan

Semiconductors

SC9012

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.1

2002-02-28

4

4. CUSTOMER CODE

There are 8 customer codes, can be selected by using the SEL pin connected with any pin of “KO0 ~ KO7”. Please

refer to follow diagram:

Connected with

SEL

System Code

(S2

S1 S0

KO0

000

KO1

001

KO2

010

KO3

011

KO4

100

KO5

101

KO6

110

20

19

18

17

16

15

14

13

12

SEL

KO7

111

The Custom Code consists of 8 bits



S0

S1

S2

S3

S4

S5

S6

S7

Among these, S0, S1, S2 can be selected with SEL Pin and any pin of “KO0 ~ KO7”; Bit S3 has a fixed value of “1”;

Bits S4 ~S7haveafixed valueof “0”.

5. TRANSMISSION CODE

S0 S1 S2 S3

S5

S4

S6 S7

D0 D1 D2 D3 D4

D0 D1 D2 D3 D4 D5 D6 D7

D5 D6 D7

Leader

Code

Custumer Code

Customer Code

Key Data Code

Key Data Code

S0 S1 S2 S3

S5

S4

S6

S7

Refer to the above diagram, the transmission code consists of leader code, customer code, and key data code.; The

leader code consists of a 4.5 ms carrier waveform followed by a 4.5 ms OFF waveform. The 8-bits customer code

transmitted two times; The 8-bits key data code transmitted two times also, first is the origin code; second is the

inverse code.

The code uses the PPM (Pulse Position Modulation ) Method, with “0”and “1” differentiated by the time between

pulses.