Circuit design of C8051F330 mobile phone anti-theft alarm system

Factory direct sales - SMD aluminum electrolytic capacitor - straight plug solid capacitors, the products are imported from Japan, aluminum foil,

In this paper, a mobile phone anti-theft alarm system is designed by C8051F330 and wireless transceiver CC2500 with fully integrated mixed-signal system-on-chip (MCU). The alarm system utilizes a radio frequency transceiver for near-distance information transmission. The mobile phone anti-theft alarm system realizes the real-time communication between the mobile phone and the user by using the highly integrated C8051F330 device and the RF communication device CC2500, effectively preventing the loss and theft of the mobile phone. Because the system uses C805lF330 and CC2500 as the core components, the structure is simple, the performance is stable, the volume is small, and the cost is low. It has been successfully used for burglar alarms for mobile phones and works well.

System hardware design

The hardware design of the system is mainly used to realize RF communication between C8051F330 and CC2500. Since the C805lF330 integrates a high-precision clock source internally, its internal 64 KB Flash is sufficient for system use. Therefore, when designing the oscillating circuit and the storage circuit, there is no need to expand, and only the power supply circuit, the CC2500 communication circuit, and the reset circuit need to be designed. This makes the system hardware design circuit structure simple, high integration, and good reliability. Figure 2 shows the schematic diagram of the system hardware design. In order to improve the communication speed and reliability of the system design, the CC2500 can be used to realize the SPI communication with the C8051F330 through the RF communication module VW2500. The VW2500 and C805lF300 are powered by R3 separately to reduce the interference of the RF signal to the MCU and ensure reliable operation of the system.