User's Manual

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8 9
Receivers
The signal sent by the Keyfob transmitter can be
received by the LR Series receiver module or the LT
Series transceiver module. The receiver module is
connected directly to the DS Series decoder, which
decodes the transmitted signal.
When a button is pressed on the transmitter, a
corresponding line on the decoder goes high (as long
as the addresses match). This can then be connected
to whatever circuitry is required by the application.
Application Note AN-00300 discusses in detail how to set the addresses
on all of the units. Data guides for all of the receivers and the DS Series
decoder can be found on the Linx website, www.linxtechnologies.com.
Typical Applications
Figure 10 shows a typical schematic using the LR Series receiver and the
DS Series decoder.
The 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. As long as the address lines match, when a button on the
transmitter is pressed, a corresponding data line on the decoder (D0–D7)
goes high. These data lines can then be connected to external circuitry to
perform whatever function is required by the application.
P_SEL
1
D0
2
D1
3
D2
4
D3
5
D4
6
D5
7
GND
8
D6
9
D7
10
E/D_SEL
11
D_CFG
12
A_CFG0
13
A_CFG1
14
A0
15
A1
16
A2
17
A3
18
GND
19
VCC
20
A4
21
A5
22
A6
23
A7
24
A8
25
A9
26
TE/DI
27
VT/DO
28
LICAL-EDC-DS001
VCC
GND
GND
GND
GND
D0
D1
D2
D3
D4
D5
D6
D7
VT
1
2
3
20
19
18
4
5
6
17
16
15
7
8
9
14
13
12
10 11
100k 100k 100k 100k 100k
100k
100k
100k
100k100k
VCC
GND
VCC
VCC
GND
GND
GND
ANTENNA
NC
1
NC
2
NC
3
GND
4
VCC
5
PDN
6
RSSI
7
DATA
8
NC
9
NC
10
NC
11
NC
12
NC
13
NC
14
GND
15
ANT
16
RXM-xxx-LR
VCC
GND
Figure 9: Linx Receivers
Figure 10: LR Receiver and DS Decoder Schematic