SC50462

HANGZHOU SILAN MICROELECTRONICS CO.,LTD

REV:2.2

2005.12.15

Http: www.silan.com.cn

Page 4 of 12

3. KEY INPUT

A total of 64 keys may be connected by Input Pins(I1~I8) and Output Pins(S1~S8) to form an 8x8 Key Matrix.

Double key operation is possible for only one of the keys— SW25~SW28 in combination with any one of the keys

–SW11~SW13. Any other key combination are regards as illegal and will not generate any activity. Thus, only the

following key combinations may be used for the doubled key operation:

S1

S2

S3

S4

S5

S6

S7

S8

I8

I7

I6

I5

I4

I3

I2

I1

SW11

SW12

SW13

SW25

SW26

SW27

SW28

SW25 and SW11

SW25 and SW12

SW25 and SW13

SW26 and SW11

SW26 and SW12

SW26 and SW13

SW27 and SW11

SW27 and SW12

SW27 and SW13

SW28 and SW11

SW28 and SW12

SW28 and SW13

Note:

SC50462 permits two keys function but

only “ ”key are allowed.

When you push one key of SW11/12/13,

you can push with another key of

SW25/26/27/28. Otherwise, other

conditions are illegal.

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.

Table 1: Key Matrix/Code

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