SC50462
Data
D3
0
1
0
1
0
1
0
1
D4
0
0
1
1
0
0
1
1
D5
0
0
0
0
1
1
1
1
Key Input
I1
I2
I3
I4
I5
I6
I7
I8
Octal display
0
1
2
3
4
5
6
7
Table 2: Double Key Signal/Code
Scan Output
S1/I1
(SW1
1)
S5/I2 (SW25)
S6/I2 (SW26)
S7/I2 (SW27)
S8/I2 (SW28)
S2/I1
(SW1
2)
S5/I2 (SW25)
S6/I2 (SW26)
S7/I2 (SW27)
S8/I2 (SW28)
S5/I2 (SW25)
S6/I2 (SW26)
S7/I2 (SW27)
S8/I2 (SW28)
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
C4
and
C5
Terminals. The
C4
and
C5
pins are inversed; therefore, if the
C4
and
C5
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
Data Code
D0
0
1
0
1
0
1
0
1
0
1
0
1
D1
0
0
1
1
0
0
1
1
0
0
1
1
D2
1
1
1
1
1
1
1
1
1
1
1
1
D3
1
1
1
1
1
1
1
1
1
1
1
1
D4
0
0
0
0
0
0
0
0
0
0
0
0
D5
0
0
0
0
0
0
0
0
0
0
0
0
D6
1
1
1
1
0
0
0
0
1
1
1
1
D7
0
0
0
0
1
1
1
1
1
1
1
1
D0~D2
4
5
6
7
4
5
6
7
4
5
6
7
Octal Display
D3~D5
1
1
1
1
1
1
1
1
1
1
1
1
D6~D7
1
1
1
1
2
2
2
2
3
3
3
3
S3/I1
(SW1
3)
Bit "0"
1.00/1.05ms
Bit "1"
2.00/2.10ms
Note: Oscillator Frequency=480 or 455kHz
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:2.2
2005.12.15
Page 5 of 12
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