OEM Compact Handheld
Transmitter
Data Guide
Warning:
Some customers may want Linx radio frequency (“RF”)
products to control machinery or devices remotely, including machinery
or devices that can cause death, bodily injuries, and/or property
damage if improperly or inadvertently triggered, particularly in industrial
settings or other applications implicating life-safety concerns (“Life and
Property Safety Situations”).
NO OEM LINX REMOTE CONTROL OR FUNCTION MODULE
SHOULD EVER BE USED IN LIFE AND PROPERTY SAFETY
SITUATIONS.
No OEM Linx Remote Control or Function Module
should be modified for Life and Property Safety Situations. Such
modification cannot provide sufficient safety and will void the product’s
regulatory certification and warranty.
Customers may use our (non-Function) Modules, Antenna and
Connectors as part of other systems in Life Safety Situations, but
only with necessary and industry appropriate redundancies and
in compliance with applicable safety standards, including without
limitation, ANSI and NFPA standards. It is solely the responsibility
of any Linx customer who uses one or more of these products to
incorporate appropriate redundancies and safety standards for the Life
and Property Safety Situation application.
Do not use this or any Linx product to trigger an action directly
from the data line or RSSI lines without a protocol or encoder/
decoder to validate the data.
Without validation, any signal from
another unrelated transmitter in the environment received by the
module could inadvertently trigger the action.
All RF products are susceptible to RF interference that can prevent
communication.
RF products without frequency agility or hopping
implemented are more subject to interference. This module does not
have a frequency hopping protocol built in.
Do not use any Linx product over the limits in this data guide.
Excessive voltage or extended operation at the maximum voltage could
cause product failure. Exceeding the reflow temperature profile could
cause product failure which is not immediately evident.
Do not make any physical or electrical modifications to any Linx
product.
This will void the warranty and regulatory and UL certifications
and may cause product failure which is not immediately evident.
!
Table of Contents
1
Description
1
Features
1
Applications
2
Ordering Information
2
Electrical Specifications
3
Theory of Operation
4
Protocols
5
Setting the Transmitter Address
5
Button Assignments
6
Connection Considerations
6
Battery Replacement
6
Assembly Diagram
7
Labeling / Instruction Requirements
8
Receivers
9
Typical Applications
11
Resources
OEM Compact Handheld Transmitter
Data Guide
Description
R 0.2"
The CMD-HHCP-***-xxx-MD Compact
Handheld transmitter is ideal for general
2.00"
remote control and command applications.
2.81"
As a part of our DS Series encoder-based
1.35"
OEM family, it has been pre-certified
for FCC Part 15, Industry Canada, and
European CE (433MHz only) compliance,
reducing development costs and time to
1.62"
0.20"
0.60"
market. Available in 315, 418 (standard) or
Figure 1: Package Dimensions
433.92MHz, this compact remote has a
transmission range of up to 750 feet (230m)
O
ON
Ligh
line of sight. The transmitter unit can be
2
ts
O
1
ON
O
3
configured with 1 to 8 buttons and the
Poo
l
O
D
ON
keypad and labeling can be customized.
O
4
Spa
O
ON
C
Selectable addressing allows the creation
A
B
FASCO
of up to 1,022 distinct transmitter-receiver
relationships. The address can be easily
Figure 2: With a one-time NRE and minimum
changed via an externally accessible DIP
order, Linx can configure the keypad and label
switch. The transmission can be decoded
areas to meet your specific requirements.
using a matching Linx Function Module, KH2
or KH3 Series receiver / decoder, or a Linx LR or LT Series receiver paired
with a decoder IC or microcontroller. The unit uses a single 3V CR2032
lithium button cell.
FF
N
FF
N
FF
N
Features
• FCC, Canada and CE
pre-certified
• 1 to 8 buttons
• Customizable keypad
• Two protocols for performance
(serial) and compatibility (Holtek)
Applications
• General remote control
• Keyless entry
• Garage / gate openers
• Lighting control
• Call systems
• Home / industrial automation
–
1
–
Revised 3/18/2015
Ordering Information
Ordering Information
Part Number
CMD-HHCP-***-xxx-MD
EVAL-***-HHCP
Description
Compact Handheld Transmitter
HHCP Basic Evaluation Kit
Theory of Operation
The CMD-HHCP-***-MD Compact Handheld transmitter combines the LR
Series transmitter with an internal Splatch Series antenna and an on-board
DS Series encoder IC to form a simple, yet highly reliable, RF remote
control transmitter. The LR transmitter is a low-cost, high-performance,
synthesized ASK / OOK transmitter. The transmitter’s synthesized
architecture delivers outstanding stability and frequency accuracy while
minimizing the effects of antenna port loading and mismatching. This
reduces or eliminates frequency pulling, bit contraction, and other negative
effects common to SAW-based transmitter architectures, providing a
significantly higher level of performance and reliability.
When a button is pressed on the transmitter, power is applied to the
internal circuitry and the encoder IC is enabled. The encoder detects the
logic states of the address lines and button data lines. These states are
formatted into a three-word transmission cycle that continues until the
button is released. The encoder data is used to modulate the transmitter,
which, through the antenna, conveys the data into free space. On the
receiver side, a decoder IC or custom microcontroller is used to check
the transmitter’s address bits against the address settings of the receiving
device. If a match is confirmed, the decoder’s outputs are set to replicate
the transmitter’s button states. These outputs can then be used to activate
external circuitry required by the application.
The transmitter is compatible with several Linx receiver products, including
the LR, KH2, KH3, LT and OEM product families. For applications where
range is critical, the LR Series receiver is the best choice due to its
outstanding sensitivity. When the transmitter is combined with an LR Series
receiver and the DS Series decoder, ranges of up to 750 feet (230m) are
possible. Applications operating over shorter distances will also benefit
from the increased link reliability and superior noise immunity provided by
the LR Series receiver.
*** = 315, 418 (Standard) or 433.92MHz
xxx = Custom color, leave blank for black
Figure 3: Ordering Information
Electrical Specifications
Electrical Specifications
Parameter
Power Supply
Operating Voltage
Supply Current
Power-Down Current
Transmitter Section
Transmit Frequency Range
CMD-HHCP-315-MD
CMD-HHCP-418-MD
CMD-HHCP-433-MD
Center Frequency Accuracy
Environmental
Operating Temperature Range
1. Characterized, but not tested
Figure 4: Electrical Specifications
–40
+85
°C
1
–50
F
C
315
418
433.92
+50
MHz
MHz
MHz
kHz
V
CC
l
CC
l
PDN
2.1
3.0
3.4
5.0
3.6
VDC
mA
nA
1
Designation
Min.
Typ.
Max.
Units
Notes
–
2
–
–
3
–
Protocols
The DS Series encoder inside the Compact Handheld transmitter supports
two protocols. The first protocol is based on the Holtek HT640 encoder
and is completely backwards compatible with older generation transmitters
and systems based on the HT658 decoder. The second is a serial protocol
that offers more noise immunity and faster response time while keeping the
simple addressing.
The transmitter can use only one protocol at a time. The protocols do not
work together.
The protocol is selected with a switch next to the battery. Figure 5 shows
this switch.
Setting the Transmitter Address
The Compact Handheld transmitter
allows the selection of one of 1,022
unique addresses. All transmitters are
supplied set to the same address. To
avoid contention with other units or to
create unique relationships, the address
can be changed. This is accomplished
using internal DIP switches as shown.
The switches are accessed by
removing the DIP switch access cover
on the back of the transmitter.
OFF ON
A0 = 1
A1 = 2
A2 = 3
A3 = 4
A4 = 5
A5 = 6
A6 = 7
A7 = 8
A8 = 9
A9 = 10
If the switch is on, the address line
is connected to ground, otherwise it is
Figure 6: DIP Switch Assignments
pulled to supply. The receiver’s address
must match exactly in order for the units to communicate. Application Note
AN-00300 describes in detail how to set the address to match any of the
receivers offered by Linx. This note can be found in the Support section of
the Linx website, www.linxtechnologies.com.
Note:
Setting all of the DIP switches on or all of them off are not valid
addresses. At least one switch must be different from the rest.
Figure 5: Protocol Selection Switch
Button Assignments
Figure 7 illustrates the relationship between the button locations and
encoder data lines.
If the switch is toward the top then the Holtek protocol is selected. If the
switch is toward the bottom then the serial protocol is selected.
D7
D5
D3
D1
D6
D4
D2
D0
Figure 7: Button Assignments
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4
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5
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