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 the 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 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 selectthe following operations by pressing the button of the remote
transmitter.
OPERATION ACTION
LOCK
UNLOCK
TRUNK
PANIC
lock the door
unlock the door
unlock the TRUNK
alarm the horn
Transmitter
f = 313.85MHz
2. User's manual (provisionally)
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REMOTE TRANSMITTER
LOCK
UNLOCK
TRUNK
OKA 950T
PANIC
(후면)
You can lock and unlock
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.
TRUNK
When you push the TRUNK button, trunk will open.
our vehicle with the remote transmitter.
4. Specification
p
This device complies with part 15 of the FCC Rules and IC RSS-GEN. 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.
You are cautioned that changes or modifications not expressly approved by the party responsible
for compliance could void your authority to operate the equipment.
4.1 CPU
Type uPD789860-xxx(8bit)
ROM 4 Kbytes
RAM 128 bytes
EEPROM 32 bytes
Clock frequency 4.19MHz
Clock frequency generation X-TAL OSCILATION
Package 20pin SSOP
4.2 RF block
Carrer frequency 313.85MHz
Frequency generation X-TAL
Manufacturer : NEC Corporation
Modulation FSK
Bit transmission rate 500bps or 1000bps
Bandwidth 120KHz
RF out
4.3 Others
Dimension 62mm×34mm×15mm
Weigh 23g
Battery Lithium cell (CR2032)
Operation Voltage DC3V
Operation Temperature -20℃∼+60℃
ut power (field strength) ≤ 75.6dBuV/m
Manufacturer : PANASONIC Battery corporation etc.
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