51单片机及其C语言程序开发实例,介绍了51单片机常用的模块电路设计与实现，主要模块有键盘、LCD显示、A/D转换、D/A转换、I2C总线应用、语音、实时时钟、红外、USB、步进电机、数字锁相环、串口通信、DDS等-51 microcontroller C language program development instance, introduced 51 single-chip module circuit design and implementation of the main mod

本程序是dds模块ad9850的串行方式程序-This procedure is a serial manner dds module ad9850 program

A family of leased line data communication technologies that provides a dedicated synchronous transmission connection at speeds of 56 Kbps. Digital data service (DDS) is only one example of a type of digital line; others include Integrated Services D