User's Manual
Table Of Contents
- Description
- Features
- Applications
- OEM Configurations
- Ordering Information
- Electrical Specifications
- Theory of Operation
- Setting the Transmitter Address
- Button Assignments
- Contention Considerations
- Battery Replacement
- Assembly Diagram
- Compliance Requirements
- Labeling / Instruction Requirements
- Typical Applications
- Resources
- Notes
– – – –
8 9
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. 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 Keyfob transmitter
can be received by the LR Series receiver module or
the LT Series transceiver module. These modules can
be connected to the DS Series decoder to decode the
signal, or a custom microcontroller can be programmed
to decode it and take specific action.
The KH3 Series offers a slightly simpler solution by
combining the LR Series receiver and the DS Series
decoder in a single package. This receiver only supports
the Holtek protocol, not the serial protocol.
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
VCC
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
GND
VCC
Holtek
Serial
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
Figure 9: Linx Receivers
Figure 10: LR Receiver and DS Decoder Schematic