SC9012 Silan Microelectronics Joint-stock, SC9012 Datasheet - Page 5

• Manufacturer Part Number: SC9012
• Description: INFRARED REMOTE CONTROL TRANSMITTER
• Manufacturer: Silan Microelectronics Joint-stock

The waveforms of leader code, bit “0” and bit “1” refer to follow diagram:
6. DOUBLE KEY OPERATION
There are 6 double keys operation, such as K21 connected with K22 ~ K24; K25 connected with K26 ~ K28, refer to
the follow table:
When any of the double or multiple key combinations are pressed, except the 6 keys mentioned above, there is no
output.
In addition, Double Key Operation is useful for tape deck recording operation. Press the K21 or K23 key at the first
then followed by the secondary key such as K22~K24; K26~K28.
Please refer to the follow diagram:
1. Double Key Operation available
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
The Primary Key
Silan
Semiconductors
K21
K25
K
K
(K
22
26
K
21
25
~K
~K
)
24
28
Leader
Bit“0”
Bit“1”
Code
The Secondary Key
K
Tm
Tm
21
K22
K23
K24
K26
K27
K28
(K
4.5ms
Tm
25
T>126ms
3Tm
) Key Code Transmission
Tm=0.56ms
4.5ms
D0
1
0
1
1
0
1
5
D1
0
1
1
0
1
1
K
(K
22
26
~K
~K
24
D2
28
1
1
1
0
0
0
+D
+D5(1))
5
(1) Key Code Transmission
D3
0
0
0
1
1
1
D4
1
1
1
1
1
1
D5
1
1
1
1
1
1
SC9012
Rev: 2.1
D6
0
0
0
0
0
0
D7
0
0
0
0
0
0
2002-02-28