Omron Automotive Electronics Korea OKA-220T RF Keyless Entry System User Manual MANUAL AND BLOCK DIAGRAM

Omron Automotive Electronics Korea Co., Ltd. RF Keyless Entry System MANUAL AND BLOCK DIAGRAM

MANUAL AND BLOCK DIAGRAM

Transmitter, RF Keyless Entry System OMRONAUTOMOTIVEELECTRONICSKOREA OKA-220T
Table of contents1. Constitution of the Radio Frequency Keyless Entry system Controller for vehicle ---- 12. User's manual (provisionally) --------------------------------------------------------------------- 23. Block diagram --------------------------------------------------------------------------------------- 34. Specification ----------------------------------------------------------------------------------------- 45. Features ----------------------------------------------------------------------------------------------- 5
- 1 -1. Constitution of the Radio Frequency Keyless Entry System for vehicleThe radio frequency keyless entry is a system that it controlls locking and unlocking the door and the trunk by wireless remotecontroller. This system consists of three components. The TRANSMITTER is a device that transmits the signal when the button ispressed. 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 thesychronous code, it runs continuously to receive the signals completely. After receiveing the signal, the receiver decides whichoperation will be performed. The user can select the following operations by pressing the button of theremote transmitter. OPERATION ACTION LOCK lock the door UNLOCK unlock the door TRUNK open the door
- 2 -2. User's manual (provisionally) REMOTE TRANSMITTERYou can lock and unlock and open the trunk 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. TRUNK When you push the TRUNK button, Door of trunk will open.
- 3 -3. Block diagram This is block diagram concerning to the transmitterfigure 3.1 block diagram of the transmitter
- 4 -4. Specification4.1 CPU4.2 RF block4.3 Others Type ROM RAM EEPROM Clock frequency uPD754144-xxx(4bit) Manufacturer : NEC Corporation 4096 x 8bit(4kbytes) 128 x 4bit 16 x 8bit 500KHz Carrer frequency Frequency generation Modulation Bit transmission rate Bandwidth 307.9MHz SAW resonator FSK 100bps or 500bps 120KHz Dimension Weigh Battery Operation Voltage Operation Temperature 55mm x 34mm x 11mm 22.5g Lithium cell (CR2032) Manufacturer: PARASONIC Battery corporation etc. DC3V, 10mA -20+60
- 5 -5.Features5.1 Transmission frameThe transmission begins immediately in case of LOCK or UNLOCK or TRUNK button is pressed.The transmisssion frame consists of the synchronous frame and the data frame. The synchronous frame has 30 synchronouscodes that it will be used for the receiver to wake up. The data frame consists of 24bit length identification code, 16bit securitycode and function code. 16million different identification codes are available.The security code is always changed in case of any of the buttins is pressed. The transmission time is typically 600 milliseconds.5.2 Battery savingTo prevent the battery exhaustion, the micro-computer of the transmitter is usually inactive. When the button will be pressed, themicro-computer wakes up immediately and judges which button is pressing. Then the micro-computer constructs thetransmission frame and radiates it from the antenna .After transmitting , the micro-computer switches stand-by mode by itself.INFORMATION TO THE USERThis equipment has been tested and found to comply with the limits for a Class B digital device, pursuant topart 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmfulinterference in a residential installation. This equipment generates, uses and can radiate radio frequencyenergy and, if not installed and used in accordance with the instructions, may cause harmful interference toradio communications. However, there is no guarantee that interference will not occur in a particularinstallation. If this equipment does cause harmful interference to radio or television reception, which can bedetermined by turning the equipment off and on, the user is encouraged to try to correct the interference byone 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.WARNINGChanges or modifications not expressly approved by the manufacturer could void the user’s authority to operate theequipment.

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