Typical Applications
The HS Series is ideal for registering button presses in secure remote
control applications. An example application circuit of the decoder side is
shown in Figure 15.
100k
10k 2.2k
100k
From Copy Input Port
To Key Output Port
220
1
2
3
4
5
6
7
8
9
10
D6 LICAL-DEC-HS001 D5
D7 D4
SEL_BAUD D3
SEND_COPY D2
GND VCC
GND VCC
COPY_IN D1
CREATE_KEY D0
KEY_OUT DATA_IN
MODE_IND LEARN
20
19
18
17
16
15
14
13
12
11
From Receiver
100k
Figure 15: HS Series Decoder Application Circuit
In this circuit, the baud has been set for 2,400bps by pulling the SEL_
BAUD line to ground.
SEND_COPY, CREATE_KEY, and LEARN are all connected to buttons that
will pull the line high when pressed. Since the lines do not have internal
resistors, 100k Ω resistors are used to pull the lines to ground when not in
use.
COPY_IN is connected to a port that allows the transfer of the User Data
from another decoder. This port can be a simple wire, an infrared receiver,
or any other device that allows the transmission of asynchronous serial
data.
The KEY_OUT line is connected to a port that allows the transfer of the
key to an encoder or another decoder. This port can be a simple wire,
an infrared diode, or any other device that allows the transmission of
asynchronous serial data.
The KEY_OUT line can also be connected to a microprocessor or a PC to
record the transmitter identity. Application Note AN-00156 has sample C
code that will read the transmitter ID and display the ID number on an LCD
screen.
A LED indicator is attached to the MODE_IND line to provide visual
– 22 –
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