Omron Automotive Electronics Korea OKA-240T RF Keyless Entry System (Transmitter) User Manual

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Document ID	525925
Application ID	SPNR+lEX8eRc0ZIJ8qJ+Cw==
Document Description	Users Manual
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	17.6kB (219946 bits)
Date Submitted	2005-03-23 00:00:00
Date Available	2005-03-23 00:00:00
Creation Date	2005-03-23 10:11:30
Producing Software	Acrobat PDFWriter 4.05 Windows NT¿ë
Document Lastmod	0000-00-00 00:00:00
Document Title	매뉴얼...SM-US,FCC,IC 3B(2005) CPU 변경.hwp
Document Creator	매뉴얼...SM-US,FCC,IC 3B(2005) CPU 변경.hwp [C:\Documents and Settings\james_kwon\My Documents\업체 정보 ㄱ-z\ㅎ\한국오므론전장\240T-FCC,IC\FCC-예비서류\] - 한글
Document Author:	james_kwon

OMRON
AUTOMOTIVE
ELECTRONICS
KOREA
OKA-240T
Transmitter, RF Keyless Entry System
Table of contents
1.
Constitution of the Radio Frequency Keyless Entry system Controller
for vehicle .................................................................................................................
2.
User's manual (provisionally) ...............................................................................
3.
Block diagram ...........................................................................................................
4.
Specification ...............................................................................................................
5.
Features ......................................................................................................................
This device complies with part 15 of the FCC Rules. Operation
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.
Caution:
Any changes or modifications to the equipment not expressly approved
by the party responsible for compliance could void user's authority
to operate the equipment.
1. Constitution of the Radio Frequency Keyless Entry
System for vehicle
The radio frequency keyless entry is a system that it controls locking and unlocking the door and t h e
trunk by wireless remote controller. This system consists of three components. The TRANSMITTER is a device
that transmits the signal when the button is pressed.
The transmission signal consists of several synchronous
codes , unique identification code , security code and function code. The RECEIVER is fixed inside t h e
vehicle. It works intermittently to prevent the battery exhaustion.
When the receiver detects t h e
synchronous code, it runs continuously to receive the signals completely. After receiving the signal, the receiver
decides which operation will be performed. The user can select the following operations by pressing the
button of the remote transmitter.
OPERATION
ACTION
LOCK
lock the door
UNLOCK
unlock the door
PANIC
alarm the horn
Transmitter
f = 307.9MHz
- 1 -
2. User's manual (provisionally)
REMOTE TRANSMITTER
UNLOCK
PANIC
LOCK
You can lock and unlock your vehicle with the remote transmitter.
LOCK
When you push the LOCK button, all the doors will lock.
You cannot lock any of the doors with the remote transmitter if any door is open or the key is t h e
ignition switch.
UNLOCK
When you push the UNLOCK button, all the doors will unlock.
You cannot unlock any of the doors with the remote transmitter if any door is open or the key is in the
ignition switch.
PANIC
When you push the PANIC button, horn will alarm.
- 2 -
3. Block diagram
This is block diagram concerning to the transmitter
LOCK
UNLCOK
8BIT
CPU
PANIC
TRANSMISSION
EEPROM
RF
CIRCUIT
SAW Resonator 308 MHz
CRYSTAL 4.19 MHz
figure 3.1 block diagram of the transmitter
- 3 -
4. Specification
4.1 CPU
Type
uPD789860-xxx(8bit)
Manufacturer : NEC Corporation
ROM
4 Kbytes
RAM
128 bytes
EEPROM
32 bytes
Clock frequency
4.19MHz
Clock frequency generation
CRYSTAL Osillation
Package
20pin SSOP
4.2 RF block
Carrer frequency
307.9MHz
Frequency generation
SAW Resonator
Modulation
FSK
Bit transmission rate
1000bps or 500bps
Bandwidth
100KHz
RF output power (field strength)
5000μ V/m at 3m
4.3 Others
Dimension
56mm×35mm×11mm
Weigh
22.4g
Battery
Lithium cell (CR2032)
Manufacturer : PANASONIC Battery corporation etc.
Operation Voltage
DC 3V
Operation Temperature
-20℃˜+60℃
- 4 -
5.Features
5.1 Transmission frame
The transmission begins immediately in case of LOCK and UNLOCK and PANIC button is pressed.
The transmission frame consists of the synchronous frame and the data frame. The synchronous frame
has 30 synchronous codes that it will be used for the receiver to wake up. The data frame consists of
24bit length identification code, 16bit security code and function code. 16million different identification codes
are available.
The security code is always changed in case of any of the buttons is pressed. The transmission time is
typically 640 milliseconds.
5.2 Battery saving
To prevent the battery exhaustion , the micro-computer of the transmitter is usually inactive. When the button
will be pressed, the micro-computer wakes up immediately and judges which button is pressing. Then the
micro-computer constructs the transmission frame and radiates it from the antenna .After transmitting , the
micro-computer switches stand-by mode by itself.
- 5 -

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Source Exif Data:

File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
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Page Count                      : 7
Creator                         : 매뉴얼...SM-US,FCC,IC 3B(2005) CPU 변경.hwp [C:\Documents and Settings\james_kwon\My Documents\업체 정보 ㄱ-z\ㅎ\한국오므론전장\240T-FCC,IC\FCC-예비서류\] - 한글
Create Date                     : 2005:03:23 10:11:30
Title                           : 매뉴얼...SM-US,FCC,IC 3B(2005) CPU 변경.hwp
Author                          : james_kwon
Producer                        : Acrobat PDFWriter 4.05 Windows NT¿ë

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