Silan

Semiconductors

SC50462

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.1

2002-02-28

5

4. TRANSMISSION CODE

The transmission Code consists of 16 bits, namely: 8 bits custom code(C0~C7 ) and 8 bits data code (D0~D7).

Please refer to the table below:

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

Custom Code

Data Code

One frame of the Transmission Code

If a Single Shot Key is depressed, data Codes—D6 and d7 will be given the value of (0,0).Please refer to the

table1.If a valid double key operation is performed, the data codes will receive the values described in Table 2.

Data

Scan Output

D0

D1

D2

Octal display

S1

0

0

0

0

S2

1

0

0

1

S3

0

1

0

2

S4

1

1

0

3

S5

0

0

1

4

S6

1

0

1

5

S7

0

1

1

6

S8

1

1

1

7

Data

Key Input

D3

D4

D5

Octal display

I1

0

0

0

0

I2

1

0

0

1

I3

0

1

0

2

I4

1

1

0

3

I5

0

0

1

4

I6

1

0

1

5

I7

0

1

1

6

I8

1

1

1

7

Table 1: Key Matrix/Code