现场可编程器件的异步串行配置

介绍了可编程集成电路的基本知识，着重介绍了大规模现场可编程集成电路ＦＰＧＡ的编程方案，以Ａｌｔｅｒａ公司的ＦＬＥＸ８０００系列芯片为例，给出了使用单片机和微机的两种配置实例。     

Emitter-coupled spin-transistor logic

The recent invention of magnetoresistive bipolar spin-transistors makes possible the creation of new spintronic logic families. Here we propose the first logic family exploiting these devices, extending emitter-coupled logic (ECL) to achieve a greater range of basis logic functions. By placing the wire from the output stage of ECL logic elements near spin-transistors in other logic stages throughout the circuit, additional basis logic elements can be realized. These new logic elements support greater logic minimization, resulting in enhanced speed, area, and power characteristics. A novel magnetic shielding structure provides this logic family with the crucial ability to cascade logic stages. This logic family potentially achieves a power-delay product 10–25 times smaller than conventional ECL, and can therefore be exploited to increase the performance of very high-speed logic circuits while broadening the range of design choices for a variety of electronic applications.     

Behavioral model synthesis with Cones

The Cones synthesis system for automatic generation of VLSI implementations is discussed. Named for the cones in sequential logic, Cones takes behavioral models written in C and produces gate-level implementations in technologies such as standard cells and programmable logic arrays or programmable logic devices. The overall design is produced faster, more efficiently, and with fewer errors. Designers are free to concentrate on functions, instead of on the details of the implementation technology     

User-programmable gate arrays: design methodology and development systems

Unlike conventional mask-programmed gate arrays, the logic, I/O functions, 7 and interconnections of Xilinx-programmable gate arrays, logic cell arrays (LCAs), are fully user programmable. The functions implemented in an LCA are determined by a configuration program that is loaded during system initialization, much like a programmable microprocessor peripheral. Powerful development tools allow the designer to progress easily from design conception to the generation of the LCA configuration programs. The basic design methodology involves three main steps: design entry, design implementation, and design verification.     

Co‐design of fast biologically‐plausible vision‐based systems for controlling the reactive behaviors of mobile robots

This paper addresses the co‐design of biologically‐plausible vision‐based algorithms applied to control the reactive behaviors of mobile robots and, especially, the control of collision avoidance in unknown and dynamic worlds. Our main tools are programmable logic devices like FPGA (field programmable gate arrays) to implement real‐time perception/actions schemes. © 2005 Wiley Periodicals, Inc.     

Combining microcontroller units and PLDs for best system design

Microcontroller timer units and programmable logic devices both can create complex system timing functions. Using the Motorola time processor unit available on the MC68332 and MC68HC1GY1 microcontrollers and PLDs from Altera, we compared the performance and flexibility of these devices in applications that require various timing functions. These investigations show that in certain systems the combination of a microcontroller timer and a PLD provides the most efficient design     

基于FPGA的运动目标检测系统

视频图像处理要求高速运算能力,在处理技术不断提高和算法复杂度不断提升的情况下,并行处理的可编程逻辑器件的高速运算能力和可重复执行多任务的特性在视频图像处理领域得到了极大的发挥。与传统的串行处理DSP芯片为核心器件的视频图像处理方案相比,单片FPGA芯片和嵌入其内部的NiosII软核处理器不仅能够达到运算速度的要求,而且成本更低、设计更简单。系统由I2C模块、视频译码模块、存储模块和检测模块组成,模块之间由Avalon总线链接。系统基于QuartusII、MATLAB和ModelSim软件工具设计与仿真,实验结果表明能够达到预期的要求。     

可编程逻辑器件逆向工程研究

逆向工程在科技发展和商业用途上都发挥着重要作用.本文针对在电子、电机和信息领域广泛应用的可编程逻辑器件进行逆向工程研究,首先根据设计中可实现的逻辑结构特征对可编程逻辑器件进行分类,分析论证使用非破坏性方法对可编程逻辑器件进行逆向还原、再造的可能性,然后理论证明可编程逻辑器件逆向工程的可行性,最后给出逆向工程分析中所涉及的关键技术.     

用CPLD实现本安型矿用数据采集系统

实现了基于CPLD的本安型矿用数据采集系统.系统利用CPLD可编程逻辑器件的模块化设计思想,结合矿用设备信号处理本安型的行业要求,使用CPLD可编程逻辑器件完成了开关量信号输入、输出和频率模拟量输入工作.由于设计中可进行逻辑仿真,从而保证了设计的正确性,缩短了产品开发周期,简化了硬件设计,为产品赢得市场争取了时间.     

Design of transfer device for magnetic thin sheet material

In order to realize the processing and retrieval of magnetic thin sheet materials in industrial production, this paper proposed a kind of transfer device for magnetic thin sheet raw material, which uses rodless cylinders as the main motive device and the programmable logic controller(PLC) to achieve the required functions, and applies the finite element analysis method to analyze its main components in the end of the design.     

Minimization of mealy finite-state machines by internal states gluing

A problem of minimization of Mealy finite-state machines that is common in synthesizing digital devices on programmable logic devices is considered. The proposed approach uses an operation of gluing two states and represents the finite-state machine as a list of transitions. Cases when gluing two states generates wait states are described. Algorithms that minimize the number of internal states, the number of transitions and input variables of Mealy finite-state machines are given. The experimental results showed that when used to implement finite-state machines on programmable logic devices, the proposed method helps decrease the implementation cost 1.31 times on average and 3 times at best. Topical directions for further study of finite-state machines minimization methods are given.     

基于硬件可编程思想的数字电路教学

可编程逻辑器件的出现,使得传统的数字系统设计方法发生了根本的改变,所以数字电路课程的教学也需要进行改革。本文通过实例介绍了可编程的思想在数字电路理论教学、实验教学以及课程设计中的具体应用,并具体分析了将可编程思想引入数字电路课程教学中的优点。     

可编程S盒及反馈移位寄存器的设计方法

可编程S盒和可编程反馈移位寄存器是可编程密码芯片的两个重要的部件。文章给出了可编程S盒和可编程反馈移位寄存器的一种逻辑设计方法,按照该方法设计的S盒能够通过编程实现任意的布尔逻辑函数,按照该方法设计的反馈移位寄存器能够通过编程灵活地改变反馈抽头和反馈函数。     

基于FPGA的运动目标检测系统

视频图像处理要求高速运算能力,在处理技术不断提高和算法复杂度不断提升的情况下,并行处理的可编程逻辑器件的高速运算能力和可重复执行多任务的特性在视频图像处理领域得到了极大的发挥。与传统的串行处理DSP芯片为核心器件的视频图像处理方案相比,单片FPGA芯片和嵌入其内部酌NiosII软核处理器不仅能够达到运算速度的要求,而且成本更低、设计更简单。系统由I2C模块、视频译码模块、存储模块和检测模块组成,模块之间由Avalon总线链接。系统基于QuartusⅡ、MATLAB和ModelSim软件工具设计与仿真．实验结果表明能够达到预期的要求。     

基于复杂可编程逻辑器件的DRAM控制器的设计与实现

本文介绍了一种用复杂可编程逻辑器件（CPLD）设计DRAM控制器的设计方法,并采用VHDL语言编程实现。     

FPGA and CPLD architectures: a tutorial

This tutorial surveys commercially available, high-capacity field-programmable devices. The authors describe the three main categories of FPDs: simple and complex programmable logic devices, and field-programmable gate arrays. They then give architectural details of the most important chips and example applications of each type of device     

基于CPLD的等精度频率计的设计

在电子领域中,测频是经常要用到的。但是传统频率计在测频时有很多缺点。本设计采用等精度测频、测周期的数字频率计的设计方案,选用单片机为核心,通过编程实现了闸门预制信号、同步控制、数据运算处理和实时显示的功能,并利用可编程逻辑器件CPLD(Complex Programmable Logic Device)的在线编程,实现了频率计的逻辑控制、计数等功能。本设计克服了传统频率计随着被测频率的改变而改变的缺点,在整个频率区域都能保持恒定的测试精度。     

适用于可编程加密芯片的可重组体系结构

提出了一种适用于可编程加密芯片的可重组体系结构。该体系结构的硬件逻辑电路能够根据不同的应用需求,重新组织,构成不同的电路结构,实现不同的功能,以匹配不同的应用需求。     

CPLD在图像采集系统中的应用

介绍了一个控制系统中的前端图像数据采集系统，以及CPLD（复杂可编程逻辑器件）在系统中的应用，这种应用技术可以用于绝大多数图像采集、存储系统中的数据采样密度的控制，同时可以起到数据缓冲的作用；并且给出了设计电路原理图以及相关代码。