This SPI-mode SD Card controller is a free SOPC Builder component that can be used in any SOPC Builder system. The included example design runs on the Nios II Embedded Evaluation Kit, Cyclone III edition (NEEK).-This SPI-mode SD Card controller is a

系统应用FPGA技术，通过VHDL编程，在CPLD上实现。电子琴的基本原理是产生各个音符对应的频率，将频率放大后驱动喇叭发出音响。该电子琴包括手动弹奏与自动演奏两种功能，其中手动弹奏时还可录音回放。文中叙述了电子琴的设计原理和分块实现的方法，详细介绍各模块的设计及模块之间的连接组合方法，还包括电子琴 -According to incomplete statistics, these companies represent about 40 of the domestic fiber la