8位相等比较器，比较8位数是否相等

本文介绍一种波导双模双带滤波器的设计方法。(This paper presents a new class of dual-mode dualband filters in which each polarization is dedicated to a selected band. The equivalent circuit is a parallel combination of two inline networks that represent each polarization. A transmission zero is generated between the two bands by properly adjusting the relative orientations of the input and output coupling apertures.)

verilog spi file with testbench

LCD 因其轻薄短小,低功耗,无辐射,平面 直角显示,以及影像稳定等特点,当今应用非常 广泛。CPLD(复杂可编程逻辑器件) 是一种具有 丰富可编程功能引脚的可编程逻辑器件,不仅可 实现常规的逻辑器件功能,还可以实现复杂而独 特的时序逻辑功能。并且具有ISP (在线可编 程) [1 ] 功能,便于进行系统设计和现场对系统进 行功能修改、调试、升级。通常CPLD 芯片都有 着上万次的重写次数,即用CPLD[ 2 ] 进行硬件设 计,就像软件设计一样灵活、方便。而现今LCD 的控制大都采用专用控制芯片,且一般都采用进 口芯片,成本较高。并且为了保证在特定环境下 控制芯片能正常工作,往往要加上必需的与门、 非门、以及HC244 ,HC245 、HC373 等元件,这样 不仅提高的成本,也因分立元件的引入而降低了 电路的可靠性。本设计的目的是采用Xilinx 公 司生产的一片XC95288 和一片XC95144 来实现 LCD 控制器以及其外围控制,时序逻辑的全部 功能,使得LCD 控制系统故障率和开发成本大 大降低,并使LCD 控制系统有强大的功能可扩 展性。-err

Verilog HDL编写的键盘扫描程序，考虑了判断按键弹起的问题。程序按一定的频率用低电平循环扫描行线，同时检测列线的状态，一旦判断有一列为低则表示有键被按下，停止扫描并保持当前行线的状态，再读取列线的状态从而得到当前按键的键码；等待按键弹起：检测到各列线都变成高点平后，重新开始扫描过程，等待下一次按键。-Written in Verilog HDL keyboard scanner, taking into account to determine key bounce problem. Program according to a certain frequency of scan lines with low-level circulation lines, while testing out the state line, once the judge has said there is a classified as low-key is pressed, stop the scan and to maintain the current line-line state, and then read out line state to get the current keys key codes to wait for key pop-up: To detect the lines at all out into a high level after the re-start the scanning process, waiting for the next key.

针对QUARTUS的DMA的VHDL代码实现(DMA Controller Code in VHDL)

useful VHDL document for programmer

基于VHDL语言的波形发生器编程设计，能够实现常用波形的产生。(Waveform generator design based on VHDL programming, to achieve common waveform generated.)

基于单片机与CPLD的 等精度频率计，VHDL语言-Based on SCM and CPLD

cycloneII ep2c5 ep2c8

relative cpu design implementation