G8D-390H-B Receiver, RF Keyless Entry System
1. Constitution of the Radio Frequency Keyless Entry System with Door Lock Controller for vehicle The radio frequency keyless entry is a system that it controlls 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.
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. And hazard warning lamp will flash three times. You cannot lock any of the doors with the remote transmitter if any door is open or the key is in the ignition switch. UNLOCK When you push the UNLOCK button once, all the door s will unlock. And hazard warning lamp will flash.
3. Block diagram This is the block diagram concerning to the receiver. POWER SOURCE(5V) 12V (car battery) EEPROM RECEIVING MODULE RELAY data UNIT 8BIT CPU output DRIVING CIRCUIT MPCS UNIT input Signal of vehicle status Figure 3.
4. Specification 4.1 CPU Type uPD 789104A(8bit) Manufacturer: NEC ROM 8K bytes RAM 256bytes Clock frequency 5.00MHz Clock frequency generation CERAMIC resonator Package 30pin SSOP 4.2 RF block Local clock frequency 324.55MHz Frequency generation Crystal resonator Modulation Single Superheterodyne Bandwidth ±200KHz Carrier Detect Sensitivity 39 dBuV 4.
5. Features 5.1 Integrated controller The controller works both wireless and wired operation. You can use it remotely as the receiver of the keyless entry system. You can operate the door lock remotery using the remote transmitter. It is also avialable to release the boot. When you turn the door lock switch, the controller works as the door lock controller. The controller monitors the switch related to the door lock.
6.2 Parts layout Figure 6.
6.3 Pattern layout Figure 6.
Figure 6.
7. Connector This is the pin assignment of the connector. No.
