搜索结果

Today’s digital systems combine a myriad of chips with different voltage configurations.Designers must interface 2.5V processors with 3.3V memories—both RAM and ROM—as wellas 5V buses and multiple peripheral chips. Each chip has specific power supply needs. CPLDsare ideal for han ...

  MP3 portable players are the trend in music-listening technology. These players do not includeany mechanical movements, thereby making them ideal for listening to music during any type ofactivity. MP3 is a digital compression technique based on MPEG Layer 3 which stores music ina lot less ...

  The Virtex-4 features, such as the programmable IDELAY and built-in FIFO support, simplifythe bridging of a high-speed, PCI-X core to large amounts of DDR-SDRAM memory. Onechallenge is meeting the PCI-X target initial latency specification. PCI-X Protocol Addendum tothe PCI Local Bus Spec ...

  One of the most misunderstood constructs in the Verilog language is the nonblockingassignment. Even very experienced Verilog designers do not fully understand how nonblockingassignments are scheduled in an IEEE compliant Verilog simulator and do not understand whenand why nonblocking assi ...

Field Programmable Gate Arrays (FPGAs) are becoming a critical part of every system design. Many vendors offer many different architectures and processes. Which one is right for your design? How do you design one of these so that it works correctly and functions as you expect in your entire system ...

UART 4 UART参考设计，Xilinx提供VHDL代码 uart_vhdl This zip file contains the following folders:  \vhdl_source  -- Source VHDL files:      uart.vhd  - top level file      txmit.vhd - transmit portion of uart  &nb ...

RSM是广州致远电子有限公司全新系列的基于RS-485接口的数据采集模块。RSM数据采集模块在单个设备中集成了I/O、数据采集和隔离的RS-485总线接口。支持标准的Modbus协议和自定义ASCII协议。RSM-7404是计数/测频模块，具有4路32位计数/测频通道，其中包括2路隔离通道和2路非隔离通道，以满足不同场合需求；模块还具有4路的DO通 ...

　　我近期计划陆续整理出以下几个方面的学习笔记：初学 ModelSimSE 时被迷糊了几天的若干概念；在 ModelSimSE 中添加 ALTERA 仿真库的详细步骤；用 ModelSimSE 进行功能仿真和时序仿真的方法（ALTERA 篇）；ModelSimSE 中常用到的几个命令及 DO文件的学习笔记；近来学到的几招 TestBench 的技巧 ...

eGroupWare is a multi-user, web-based groupware suite developed on a custom set of PHP-based APIs. Currently available modules include: email, addressbook, calendar, infolog (notes, to-do s, phone calls), content management, forum, bookmarks, wiki

软件测试：一个编译器测试软件，支持下列C语言运算符：+ - * / % ^（乘方） 负 (int) (double) "字符串" []（数组） > < == >= <= != && ! ++ -- = += -= *= /= %= ^=，支持下列关键字：void int double string if else for while do goto break continue return，支持下列数据类型：int double string int[] double[] stri ...