DESIGNED CHECKED G８C-501M Receiver, RF Keyless Entry System 戸谷 彰信 APPROVED
Table of contents 1. 1 2. Constitution of the Radio Frequency Keyless Entry system for vehicle ............. User’s manual (provisionally) .......................................................................... 3. Block diagram ................................................................................................ 3 4. Specification ................................................................................................... 4 5. Features ......................................
1. Constitution of the Radio Frequency Keyless Entry System for Vehicle The radio frequency keyless entry system controls door lock/unlock by wireless remote control. This system consists of 2 components： the TRANSMITTER and the RECEIVER. The TRANSMITTER, when activated by pressing the appropriate button, sends a signal that consists of several synchronous codes, unique identification code and security code and function code. The second component is the RECEIVER, which is installed in the vehicle.
2. User’s manual (provisional) 3BUTTON TRANSMITTER 2BUTTON TRANSMITTER (OMRON TYPE:G8D-525M-A6-C) (OMRON TYPE:G8D-525M-A9-C) You can control door lock/unlock and panic alarm with the TRANSMITTER. LOCK When you press the LOCK button, all the doors will lock. You cannot lock the doors with the TRANSMITTER if the key is in the key cylinder. UNLOCK When you press the UNLOCK button, to begin with, the driver’s door will unlock.
3. Block diagram POWER SOURCE(5V) ANT 12V (car battery) data ※ EEPROM data RECEIVE CIRCUIT 16BIT CPU 313.8〜313.9MHz FRONT ECU output DRIVE CIRCUIT DOORLOCK ACTUATOR data input CLOCK O.S.C 8.00MHz Signal of vehicle status figure 3.1 Block diagram of the receiver ANT BP FILTER RF -AMP MIX IF FILTER LOW- Freq AMP ＡＭＰ O.S.C figure 3.
4. Specification 4.1 CPU Type MB90F548GLSPFV-GS Manufacturer: FUJITSU ROM 128Kbyte RAM 4Kbyte Clock frequency 8.00MHz Clock frequency generation Crystal resonator Package 100pin LQFP 4.2 EEPROM Type S93C56AMFN Manufacturer: Seiko instruments. Memory 2Kbit Package 8pin MSOP 4.3 RF Receiver Module Type G8X-21RX-R Manufacturer: IAM Local clock frequency 10.14MHz Frequency generation Crystal Modulation Scheme FM Carrier Detect Sensitivity 3 dBuVemf resonator 4.
5. Features 5.1 Door lock control The RECEIVER sends “LOCK” signal to the door-lock actuators when LOCK button on the TRANSMITTER is pressed. The RECEIVER also sends “UNLOCK” signal to the door-lock actuators when UNLOCK button on the TRANSMITTER is pressed. These functions don’t work if the key is in the key cylinder. 5.2 Automatic locking The RECEIVER sends “LOCK” signal to the door-lock actuators if any of the doors are not opened within 30 seconds after UNLOCK button on the TRANSMITTER is pressed.
