OMRON AUTOMOTIVE ELECTRONICS KOREA OKA-330T Transmitter, RF Keyless Entry System
Table of contents 1. Constitution of the Radio Frequency Keyless Entry system Controller for vehicle ................................................................................................................. 1 2. User's manual (provisionally) ............................................................................... 2 3. Block diagram ........................................................................................................... 3 4. Specification ..........................
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 and the panic 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 and crc code.
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.
3. Block diagram This is block diagram concerning to the transmitter L OC K 8 BIT UNL OC K TRUN CPU EEPRO M TRANSM ITION RF CIRCUIT P ANIC 9.807813M Hz 4.19 M Hz figure 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 X-TAL Package 20pin SSOP 4.2 RF block Carrer frequency 313.85MHz Frequency generation X-TAL Modulation FSK Bit transmission rate 500bps or 1000bps Bandwidth 10KHz RF output power (field strength) 4000μ V/m at 3m 4.3 Others Dimension 62.0mm×33.7mm×14.3mm Weigh 21.
5.Features 5.1 Transmission frame The transmission begins immediately in case of LOCK and UNLOCK, TRUNK and PANIC is begun after 0.5s. The transmission frame consists of the synchronous frame and the data frame. The synchronous frame has 320bit 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 4bit function code and 8bit crc code. 16million different identification codes are available.