Omron Automotive Electronics Korea OKA-640T Remote Keyless Entry System User Manual OKA 640T user s manual

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Document ID	482959
Application ID	VR7OY0RtQNC3P/qViMMgCQ==
Document Description	User Manual
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	15.34kB (191718 bits)
Date Submitted	2004-10-28 00:00:00
Date Available	2004-10-28 00:00:00
Creation Date	2004-10-15 16:52:12
Producing Software	Acrobat PDFWriter 4.05 Windows NT¿ë
Document Lastmod	2004-10-27 17:00:31
Document Title	OKA - 640T - user's manual.PDF
Document Creator	OKA - 640T - user's manual.hwp [C:\Documents and Settings\james_kwon\My Documents\업체 정보 ㄱ-z\ㅅ\SGS-서울-경기지사\한국오므론전장\3모델 변경신고\] - 한글
Document Author:	james_kwon

OMRON
AUTOMOTIVE
ELECTRONICS
KOREA
OKA-640T
Transmitter, RF Keyless Entry System
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 by wireless
remote controller. This system consists of two 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 the vehicle.
It works intermittently to prevent the batteryexhaustion. When the receiver detects the synchronous code,
itrunscontinuously to receive the signals completely. Afterreceiving the signal, the receiver decides which
operation will be performed. The user can selectthe following operations by pressing the button of
the remote transmitter.
OPERATION
ACTION
LOCK
lock the door
UNLOCK
unlock the door
Transmitter
f = 307.90MHz
- 2 -
2. Operation
REMOTE TRANSMITTER
LED
UNLOCK
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 the
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.
- 3 -
3. Specification
3.1 CPU
Type
uPD754144-xxx(4bit)
Manufacturer : NEC Corporation
ROM
4096 × 8bit (4Kbytes)
RAM
128 × 4bit
EEPROM
16 × 8bit
Clock frequency
500 KHz
Clock frequency generation
CR Osillation
Package
20pin SSOP
3.2 RF block
Carrer frequency
307.90MHz
Frequency generation
SAW resonator
Modulation
FSK
Bit transmission rate
1000bps or 500bps
Bandwidth
120KHz
RF output power (field strength)
≤ 75.6 dBμV/m
3.3 Others
Dimension
52.5mm×33mm×11mm
Weigh
18.67g
Battery
Lithium cell (CR2032)
Manufacturer : PANASONIC Battery corporation etc.
Operation Voltage
DC3V
Operation Temperature
-20℃˜+60℃
- 4 -
4.Features
4.1 Transmission frame
The transmission begins immediately in case of LOCK and UNLOCK 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 identificationcode,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 600 milliseconds.
4.2
Battery saving
To prevent thebattery 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-computerconstructs the transmission frame and radiates it from the antenna .Aftertransmitting , 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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Linearized                      : No
Creator                         : OKA - 640T - user's manual.hwp [C:\Documents and Settings\james_kwon\My Documents\업체 정보 ㄱ-z\ㅅ\SGS-서울-경기지사\한국오므론전장\3모델 변경신고\] - 한글
Create Date                     : 2004:10:15 16:52:12
Title                           : OKA - 640T - user's manual.PDF
Author                          : james_kwon
Producer                        : Acrobat PDFWriter 4.05 Windows NT¿ë
Modify Date                     : 2004:10:27 17:00:31+09:00
Page Count                      : 6

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