电子琴VHDL程序包含有：顶层程序、音阶发生器程序、数控分频模块程序和自动演奏模块程序。-Keyboard VHDL program includes: top-level program, scale generator program, CNC frequency module program and the program automatically play the module.

数字锁相环频率合成器的设计,鉴相器、环路滤波器、数控振荡器、反馈分频器-Digital PLL frequency synthesizer, phase detector, loop filter, NCO, feedback divider