基于AT89C52的数字频率合成器设计与实现

his article introduces a digital synthesizer system, which consist of microcontroller, direct digital synthesizer part and the liquid crystal display part. Microcontroller includes the AT89S52, AT24C02, 74LS164 chips. The main part of DDS is a the MC125152 ，which is component of Phase-locked frequency synthesizer using the pulse-swallow-divide technique. The system uses the 128*64 liquid crystal display module as part of the main display components，The frequency is output through single-chip encoding digital frequency, and be shown by the LCD.