SC50462

HANGZHOU SILAN MICROELECTRONICS CO.,LTD

REV:2.2

2005.12.15

Http: www.silan.com.cn

Page 5 of 12

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 2: Double Key Signal/Code

Data Code

Octal Display

Scan Output

D0

D1

D2

D3

D4

D5

D6

D7

D0~D2

D3~D5

D6~D7

S5/I2 (SW25)

0

0

1

1

0

0

1

0

4

1

1

S6/I2 (SW26)

1

0

1

1

0

0

1

0

5

1

1

S7/I2 (SW27)

0

1

1

1

0

0

1

0

6

1

1

S1/I1

(SW1

1)

S8/I2 (SW28)

1

1

1

1

0

0

1

0

7

1

1

S5/I2 (SW25)

0

0

1

1

0

0

0

1

4

1

2

S6/I2 (SW26)

1

0

1

1

0

0

0

1

5

1

2

S7/I2 (SW27)

0

1

1

1

0

0

0

1

6

1

2

S2/I1

(SW1

2)

S8/I2 (SW28)

1

1

1

1

0

0

0

1

7

1

2

S5/I2 (SW25)

0

0

1

1

0

0

1

1

4

1

3

S6/I2 (SW26)

1

0

1

1

0

0

1

1

5

1

3

S7/I2 (SW27)

0

1

1

1

0

0

1

1

6

1

3

S3/I1

(SW1

3)

S8/I2 (SW28)

1

1

1

1

0

0

1

1

7

1

3

5. CUSTOM CODE

SC50462 has a total of 8 bits custom code (C0~C7). Custom Code Bits –C4 and C5 can be externally selected

using the

4

C

and

5

C

Terminals. The

4

C

and

5

C

pins are inversed; therefore, if

the

4

C

and

5

C

terminals are

pulled HIGH, then the Custom Code Bits— C4 and C5 would have the Value(0,0). Likewise, when pulled LOW,

then C4 and C5 bits will be (1,1),The other Customs Code Bits,namely:C0~C3 and C6,C7 are fixed at (1,1,1,0)

and (1,0 ):

The waveform of bits are given below:

0.25/0.26ms

1.00/1.05ms

2.00/2.10ms

Bit "0"

Bit "1"

Note: Oscillator Frequency=480 or 455kHz