Linx Technologies OTX-XXX-KFMSA Keyfob Transmitter User Manual OTX xxx HH KF5 MS Manual 6 30 05

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Date Submitted	2005-08-31 00:00:00
Date Available	2005-08-31 00:00:00
Creation Date	2005-07-08 13:42:25
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Document Title	OTX-xxx-HH-KF5-MS Manual 6-30-05.qxd
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WIRELESS MADE SIMPLE
MS KEYFOB TRANSMITTER DATA GUIDE
DESCRIPTION
The Linx MS Series Keyfob transmitter is
ideal for remote control and command applications. Available in 315, 418, or 433.92MHz
versions, it has been pre-certified for FCC
Part 15, Industry Canada, and European CE
(433MHz version only) compliance. This
dramatically reduces development cost and
time to market. The high-performance
synthesized design provides superior
frequency accuracy and minimizes body
proximity effects. When combined with an LR
receiver, the keyfob can operate at distances
of up to 1,000ft. Ease of use and security are
dramatically enhanced by the on-board MS
Series encoder, which allows instant creation
of 16,000,000 unique addresses without
cumbersome DIP switches or cut-traces.
When paired with a MS Series decoder,
keyfob identity can be determined and button
permissions established. The keyfob is
available in 1 to 5 button configurations and
can be custom labeled.
1.00"
S4
S1 S5 S3
2.23"
S2
0.45"
1.37"
Figure 1: Physical Dimensions
FEATURES
„
„
„
„
„
„
„
FCC, Canada, and CE Pre-Certified OEM Configurations
Utilizes the advanced MS encoder
With a one-time NRE and minimum
Long range
order, Linx can configure the keypad
Simple user setup
and label areas to meet your specific
224 unique addresses
requirements. Contact Linx for details.
1 to 5 buttons
ORDERING INFORMATION
Compact, stylish package
APPLICATIONS INCLUDE
„
„
„
„
„
„
General Remote Control
Keyless Entry
Garage / Gate Openers
Call Systems
Home / Industrial Automation
Wire Elimination
PART #
DESCRIPTION
OTX-***-HH-KF#-MS-xxx MS Keyfob Transmitter
EVAL-***-HH-KF#-MS
MS Keyfob Development System
# = Number of Buttons, 1 to 5
*** = 315, 418 (Standard), 433.92MHz
xxx = Color Leave blank for standard Black
WHT = White
CGY= Gray
CBL = Blue
CRE = Red
CPU = Purple
Revised 6/30/05
ELECTRICAL SPECIFICATIONS
Parameter
SETTING THE TRANSMITTER ADDRESS
Designation
Min.
Typical
Max.
Units
Notes
Operating Voltage
VCC
–
3.4
3.6
–
VDC
ICC
2.1
–
3.0
Supply Current
mA
–
IPDN
–
5.0
–
nA
OTX-315-HH-KF#-MS
–
315
–
MHz
–
OTX-418-HH-KF#-MS
–
–
MHz
–
OTX-433-HH-KF#-MS
–
418
433.92
–
MHz
–
–
kHz
bps
–
°C
POWER SUPPLY
Power-down Current
TRANSMITTER SECTION
Transmit Frequency Range
Center Frequency Accuracy
Data Rate
FC
–
–
-50
–
9600
+50
–
–
-40
–
+85
–
ENVIRONMENTAL
Operating Temperature Range
Notes
1. Characterized, but not tested.
THEORY OF OPERATION
The MS Series Keyfob Transmitter combines a high-performance synthesized
transmitter with an on-board MS Series encoder IC to form a highly reliable, yet
cost-effective RF remote control transmitter. The transmitter’s synthesized
architecture delivers superior stability and frequency accuracy while minimizing
the effects of temperature and body proximity.
The encoder address is set by using a
paper
clip
to
press
the
CREATE_ADDR button on the board
through the hole in the back of the
CREATE_ADDR
case. When the button is depressed,
Button Access
an LED on the board will light up
indicating that the address is being
created. The address will be
randomized for as long as the button is
held down. When the button is
released, the address is stored in
Figure 2: CREATE_ADDR Button Access
memory and the LED will begin flashing
to indicate that the Control Permissions may now be set. Press the buttons that
the transmitter will have the authority to access. Press the CREATE_ADDR
button with the paper clip again or wait 17 seconds for it to time out and the
address is set. The decoder will need to learn the address before it will accept
any transmissions. Please see the Typical Applications section of this data guide
or the MS Series Decoder Data Guide for details on learning an address.
BUTTON ASSIGNMENTS
The keyfob is available in five unique button configurations. Those configurations
and the corresponding switch numbers are shown in the figure below. The table
shows which encoder data line has been assigned to each switch. When a
button is pressed, the data line will go high, causing the corresponding data line
on the decoder to go high if the addresses match.
The advanced MS Series encoder has several advantages over previous
solutions. It provides more security by offering 224 addresses, which is several
orders of magnitude greater than older encoders. Furthermore, the address is
instantly established with a simple button press, eliminating cumbersome DIP
switches and cut traces. When paired with a MS Series decoder, keyfob identity
can be determined and distinct transmitter-receiver relationships established.
The keyfob operates in the following manner: when a button is pressed on the
keyfob, power is applied to the internal circuitry and the encoder IC is enabled.
The encoder then detects the logic states of the button data lines. The encoder
data is used to modulate the transmitter, which, through the antenna, conveys
the data into free space. The transmission cycle continues until the button is
released. On the receiver side, a MS Series decoder IC is used to check the
transmitter’s address bits against the address saved in memory. If a match is
confirmed, and if the decoder has permission to recognize the specific button
being pressed, 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 the LC and LR product families. For
applications where range is critical, the LR Series receiver is the best choice due
to its outstanding sensitivity. When the keyfob transmitter is combined with an LR
Series receiver and the MS Series decoder chip, ranges up to 1,000 feet are
possible. Applications operating over shorter distances will also benefit from the
increased link reliability and superior noise immunity provided by the LR receiver.
Page 2
S4
S4
S5
S5
S2
S4
S4
S3
S1
S2
S1 S5 S3
S2
S2
Button
Data Line
S1
D0
S2
D1
S3
D2
S4
D3
S5
D4
Figure 3: OTX-***-HH-KF#-MS Button Assignments
Page 3
CONTENTION CONSIDERATIONS
COMPLIANCE REQUIREMENTS
It is important to understand that only one transmitter at a time can be activated
within a reception area. While the transmitted signal consists of encoded digital
data, only one carrier of any particular frequency can occupy airspace without
contention at any given time. If two transmitters are activated in the same area
at the same time, then the signals will interfere with each other and the decoder
will not see a valid transmission, so it will not take any action.
INSTRUCTION TO THE USER
Battery
Figure 4: Battery Access
ASSEMBLY DIAGRAM
LABELING/INSTRUCTION REQUIREMENTS
The OTX-***-HH-KF#-MS Remote Command Unit has already been labeled in
accordance with FCC, Industry Canada, and European CE regulations in effect
as of the date of this document. No further labeling of the unit is needed;
however, it is necessary to include the following statement in the end product’s
instruction manual or insert card.
BATTERY REPLACEMENT
The transmitter utilizes a standard CR2032 lithium
button cell battery. In normal use, it will provide 1 to 2
years of operation. Access for replacement is
accomplished by gently prying apart the two halves of
the keyfob at the seam (fingernails or a coin will do).
Once the unit is open, remove the battery by sliding it
out from beneath the retainer. Replace it with the same
type of battery while observing the polarity shown on
the retainer and shown in the adjacent figure.
The OTX-***-HH-KF#-MS has been pre-certified by Linx Technologies for FCC
Part 15 and Industry Canada RSP-100 compliance. The 433.92MHz version has
also been tested for CE compliance for use in the European Union. The 315MHz
and 418MHz versions are not legal for use in Europe.
This device complies with Part 15 of the FCC Rules.
Operation of this device is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) this device must accept any interference received, including interference
that may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class
B digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or more of
the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
This equipment has been certified to comply with the limits for a Class B
computing device, pursuant to FCC Rules. In order to maintain compliance with
FCC regulations, shielded cables must be used with this equipment. Operation
with non-approved equipment or unshielded cables is likely to result in
interference to radio and TV reception. The user is cautioned that changes and
modifications made to the equipment without the approval of manufacturer
could void the user's authority to operate this equipment.
Figure 5: OTX-***-HH-KF#-MS Assembly
Page 4
Place the above statement in the instruction manual or insert card.
Page 5
TYPICAL APPLICATION
GND
GND
GND
GND
GND
GND
R6
100K
R5
100K
R3
100K
GND
GND
R10
100K
R8
100K
R9
100K
SW-PB
TOUCHPAD
S6
B1
BAT-LINX2032
ANT1
ANTENNA
LRTX
GND
GND
IADJ/VCC RF OUT
VCC
DATA IN
PDN
GND
TX1
STAT_IND
GND
GND
R11
D1
LICAL-ENC-MS
GND
R1
GND
R2
NS
GND
GND
GND
GND
GND
220
The RX_CNTL line can be
connected to the PDN line of the
LICAL-DEC-MS001
GND
receiver and the decoder will
GND
activate the receiver with a 10%
duty cycle This reduces the Figure 6: LR Receiver and MS Decoder Schematic
average current consumption of
the system. The adjacent figure shows it tied to ground, but to use this feature,
connect the RX_CNTL line of the decoder directly to the receiver’s PDN line.
U2
VCC
10
20
19
18
17
16
15
14
13
12
11
GND
GND
D5
D4
D3
D2
VCC
VCC
D1
D0
DATA_IN
LEARN
R4
100K
D6
D7
SEL_BAUD0
SEL_BAUD1
GND
GND
LATCH
RX_CNTL
TX_ID
MODE_IND
VCC
10
200
GND
RXM-XXX-LR-S
VCC
VCC
16
15
14
13
12
11
10
VCC
VCC
GND
ANT
GND
NC
NC
NC
NC
NC
NC
20
19
18
17
16
15
14
13
12
11
NC
NC
NC
GND
VCC
PDN
RSSI
DATA
D5
D4
D3
D2
VCC
VCC
D1
D0
SEND
CREATE_ADDR
GND
D6
D7
SEL_BAUD0
SEL_BAUD1
GND
GND
GND
TX_CNTL
DATA_OUT
MODE_IND
VCC
The decoder has several unique
features, such as Latch Mode,
Receiver Control, and TX_ID.
If the LATCH line is tied to Vcc,
the outputs will go high on the
first transmission, then low on
the second. It is shown tied low,
so the outputs will be
momentary (high for as long as
a signal is received instructing
the decoder to make them high).
R7
100K
The decoder must learn the transmitter’s address
LICAL-DEC-MS001
before they can work together. This is done by taking
the LEARN line on the decoder high, typically with a pushbutton. The
MODE_IND line will start switching (if an LED is attached, this will cause it to
flash) indicating that the decoder is in Learn Mode. Press any of the buttons on
the transmitter to initiate a transmission. Take the LEARN line high again to exit
Learn Mode and the system is ready for use. The figure below shows a
schematic for a typical application.
The Keyfob is set to 9600bps,
so SEL_BAUD0 should be tied
to Vcc and SEL_BAUD1 tied to
ground.
S1
TOUCHPAD
S2
TOUCHPAD
S3
S4
TOUCHPAD
S5
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. This can then be
connected to external circuitry to perform whatever
function is required by the application.
TOUCHPAD
RXM-***-LR
VCC
The signal sent by the Keyfob transmitter can be
received by the LC Series receiver module or the LR
Series receiver module. The outstanding sensitivity of
the LR Series receiver offers the best range when used
with the Keyfob transmitter. The receiver module is
then connected directly to the MS Series decoder,
which will decode the transmitted signal.
The TX_ID line will output a number associated with the originating
transmitter/encoder. Application Note AN00156 shows how to use this feature.
Data guides for the receivers, the MS encoder, and the MS decoder can be
found on the Linx Technologies web site, www.linxtechnologies.com.
Page 6
Figure 7: OTX-***-HH-KF#-MS Schematic Diagram
Page 7
WIRELESS MADE SIMPLE
U.S. CORPORATE HEADQUARTERS
LINX TECHNOLOGIES, INC.
575 S.E. ASHLEY PLACE
GRANTS PASS, OR 97526
PHONE: (541) 471-6256
FAX: (541) 471-6251
www.linxtechnologies.com
Disclaimer
Linx Technologies is continually striving to improve the quality and function of its products. For
this reason, we reserve the right to make changes without notice. The information contained in
this Data Guide is believed to be accurate as of the time of publication. Specifications are based
on representative lot samples. Values may vary from lot to lot and are not guaranteed. Linx
Technologies makes no guarantee, warranty, or representation regarding the suitability or
legality of any product for use in a specific application. None of these devices is intended for
use in applications of a critical nature where the safety of life or property is at risk. The user
assumes full liability for the use of product in such applications. Under no conditions will Linx
Technologies be responsible for losses arising from the use or failure of the device in any
application, other than the repair, replacement, or refund limited to the original product purchase
price. Some devices described in this publication are patented. Under no circumstances shall
any user be conveyed any license or right to the use or ownership of these patents.
© 2005 by Linx Technologies, Inc. The stylized
Linx logo, Linx, and “Wireless Made Simple”
are the trademarks of Linx Technologies, Inc.
Printed in U.S.A.

---

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Title                           : OTX-xxx-HH-KF5-MS Manual 6-30-05.qxd
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