Omron Automotive Electronics OKA-110T User manual

Transmitter, RF Keyless Entry System
OMRON
AUTOMOTIVE
ELECTRONICS
KOREA
OKA-110T

Table of contents
1. Constitution of the Radio Frequency Keyless Entry system Controller for vehicle 1
2. User's manual (provisionally) -------------------------------------------------------------------- 2
3. Specification ----------------------------------------------------------------------------------------- 3
4. Features ---------------------------------------------------------------------------------------------- 4

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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 alarm the
horn 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 the vehicle. It works intermittently to prevent the battery exhaustion. When the receiver detects the
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.

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2. User's manual (provisionally)
REMOTE TRANSMITTER
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.
PANIC
When you push the PANIC button, horn will alarm.

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3. Specification
3.1 CPU
3.2 RF block
3.3 Others
Type
ROM
RAM
EEPROM
Clock frequency
Clock frequency generation
Package
uPD789860-xxx(8bit)
Manufacturer : NEC Corporation
4kbytes
128 bytes
32 bytes
4.19MHz
CRYSTAL Oscillation
20pin SSOP
Carrier frequency
Frequency generation
Modulation
Bit transmission rate
Bandwidth
RF output power (field strength)
313.85MHz
CRYSTAL OSILLATION
FSK
100bps or 500bps
120KHz
4000uV/m at 3m
Dimension
Weigh
Battery
Operation Voltage
Operation Temperature
62mm (H) x 34mm (W) x 15mm (T)
23g
Lithium cell (CR2032)
Manufacturer: PARASONIC Battery corporation etc.
DC3V, 10mA
-20℃∼+60℃

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4.Features
4.1 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 300
milliseconds.
4.2 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.
WARNING
Any changes or modifications not expressly approved by the manufacturer could void the user’s authority to operate the
equipment.
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 operations.