基于CPLD的计算机接口电路设计技巧  

Dsigned Skill of Computer Interface Circuit Based on CPLD

作　　者：郭志友[1] 孙慧卿[1] 

机构地区：[1]广州华南师范大学光电子材料与技术研究所,510631

出　　处：《微计算机信息》2003年第3期70-71,共2页Control & Automation

摘　　要：本文介绍了利用计算机ISA、PCI总线和打印机接口设计密码电路。基于CPLD设计密码电路,具有加密性能好的特性。通过并行打印机接口设计一个密码电路,密码存储在电路中.通过操作接口读取密码。ISA总线可以直接读取电路密码.PCI总线可以通过W89C940af对密码电路进行操作,读取设置密码。The paper proposes a password circuit that by using computer ISA and PCI bus and printer interface. A password circuit is designs by using CPLD. Its characteristic is very secure. Using serial printer interface designs a circuit of password deposited in circuit. The circuit may read and get passwords. ISA buses read and get passwords directly. PCI buses may be manipulated by W89C940af in order to read and get and set passwords.

关 键 词：CPLD 计算机 接口电路 设计 密码电路 PCI总线 

分 类 号：TP334.7[自动化与计算机技术—计算机系统结构]