文中设计基于AVR单片机AT90S8515和DDS芯片AD9835的信号发生器的硬件电路，给出AD9835工作流程图和AT90S8515串行加载AD9835芯片的时序图。-In this paper，the design of a signal generator circuit based on AVR microprocessor AT90S8515 and DDS chip AD9835 is introduced，illustrated the working diagram of AD

广告灯，能左右移动，包换设计框图，程序流程图，同时包含有电路图，C和汇编程序！-Advertising lights, can move around, shifting the design diagram, process flow diagram, also includes a circuit, C and assembler!