making a simple clock using altera vhdl

SDIO 接口，实现SD卡的控制器功能，带有详细的注释(SDIO Interface,to realize the controller of SD Card,and have detail description.)

DDS的频率转换可以以近似认为是即时的，这是因为它的相位序列在时间上是离散的，在频率控制字改变之后，要经过一个时钟周期之后才能按照新的相位增量增加，所以也可以说它的频率转换时间就是频率控制字的传输时间，-DDS frequency conversion can be considered similar to real-time, this is because it is the phase sequence in time is discrete, in the frequency control word change after one clock cycle to go through before a new phase in accordance with the incremental increase, so it can be said of the frequency switching time is the frequency control word transmission time,

是基于FPGA的5620的数模转换芯片底层的应用程序，希望有用。(Is a digital-analog converter chip underlying the 5620 FPGA-based applications, and I hope useful.)

说明：  希望对VHDL的学习大家有帮助，望大家指出错误，浮想交流！(We want to learn VHDL help, hope you point out an error, daydreams exchange!)

内有LED译码器，汉明纠错译码器，地址译码器，最高优先译码器，双2－4译码器等VHDL的源代码-decoder, Hamming error correction decoder, address decoder, the highest priority decoder, dual 2-4 decoder such as VHDL source code

说明：  用VERILOG编写的一个可以实现VGA显示的程序.....(Prepared using a VERILOG VGA display program can .....)

Altium Reference design for LMH0340 test bed and design

用VHDL制作的I2C控制器，是一个component,之间添加就可以使用。-VHDL produced using I2C controller, is a component, you can use to add between.

快速付里叶变换子程序所需 RAM 空间以输入的首地址为基址,向增加的方向扩展(Fast Fourier Transform subroutine RAM space required to input the first address of the site was to increase the direction of expansion)

VHDL的应用：USB-BLASTER的原理图-VHDL FOR USB-BLASTER