User's Manual
Page 6
VCC
R1
390K
SW1
1
SW2
2
SW3
3
SW4
4
SW5
5
SW6
6
SW7
7
SW8
8
COM
9
SM1
RFIN
1
GND
2
GND
3
GND
4
GND
5
GND
6
ANT1
SPLATCH ANTENN
A
R2
100K
VCC
1
23
4
U3
DPAK-X2
1
23
4
U2
DPAK-X2
1
23
4
U4
DPAK-X2
1
23
4
U5
DPAK-X2
D1
1
D2
2
D3
3
D4
4
D5
5
D6
6
D7
7
DOUT
8
TE
9
OSC1
10
OSC2
11
GND
12
A0
13
A1
14
A2
15
A3
16
A4
17
A5
18
A6
19
A7
20
A8
21
A9
22
D0
23
VCC
24
U1
HT-640
1
2
3
20
19
18
4
5
6
17
16
15
7
8
9
14
13
12
1011
S1
SW-USMT-10
GND
GND
GND
GND
VCC
GND
R3
Set For FCC
Compliance
GND
1
DATA IN
2
GND
3
IADJ/VCC
4
RF OUT
5
GND
6
VCC
7
PDN
8
TX1
LRTX
GND
GND
VCC
VCC
GND
B1
BAT-LINX2032
Figure 7: CMD-HHCP-xxx Schematic
Page 7
RECEIVERS
There are four options for receivers within the Linx
product line. The first option is to use one of the OEM
Function Modules, such as the Relay Module or the AC
Wall Module. These items are also pre-certified and
can be immediately included in a product.
The other options are to use one of the Linx receiver
modules. The signal sent by the Compact Hand Held
transmitter can be received by the LC Series receiver
module or, for longer range, the LR Series receiver
module. These modules can be connected to the
Holtek HT658 decoder to decode the signal or a custom
microcontroller can be programmed to decode it and
take specific action.
The KH Series offers a slightly simpler solution by
combining the LC Series receiver and the HT658
decoder in a single package.
The basic operation for the system is that when a
button is pressed on the transmitter, a corresponding
pin on the decoder will go high (as long as the
addresses match). This can then be connected to
whatever circuitry is required by the application
Application Note AN00300 discusses in detail how to
set the addresses on all of the units. Data guides for all
of the receivers, the HT640 encoder, and the HT658
decoder can be found on the Linx Technologies web
site, www.linxtechnologies.com.
TYPICAL APPLICATIONS
The outstanding sensitivity of the LR
Series receiver offers the best range
when used with the Hand Held
transmitter. When using the LR
Series receiver, the Holtek HT658
decoder chip should be used to
decode the received signal. This
decoder has ten address lines that
must match the transmitter address
lines. A DIP switch is commonly
used to set these, but they can also
be hardwired. If the address lines
match, when a button on the
transmitter is pressed a
corresponding data line on the
decoder (D0-D7) will go high. These
data lines can then be connected to
external circuitry to perform
whatever function is required by the
application.
G
N
D
R1
390k
G
N
D
G
N
D
V
CC
V
CC
D1
1
D2
2
D
3
3
D4
4
D
5
5
D
6
6
D7
7
VT
8
DIN
9
OSC1
1
0
OSC2
11
G
N
D
12
A
0
1
3
A
1
14
A
2
1
5
A
3
1
6
A4
17
A
5
1
8
A
6
1
9
A7
2
0
A
8
21
A
9
22
D
0
2
3
V
CC
24
HT
658
N
C
1
N
C
2
N
C
3
G
N
D
4
V
CC
5
PDN
6
R
SSI
7
DATA
8
N
C
9
N
C
1
0
N
C
11
N
C
12
N
C
1
3
N
C
14
G
N
D
1
5
ANT
1
6
RXM-XXX-LR-
S
G
N
D
Figure 6: LR Receiver and HT658 Schematic