Cyclone IV器件的逻辑单元和逻辑阵列模块，Cyclone IV器件手册第1.pdf

2. Cyclone IV 器件的逻辑单元和逻辑阵 列模块 November 2009 CYIV-51002-1.0 CYIV-51002-1.0 这个章节包含了定义逻辑单元 (LE) 和逻辑阵列模块 (LAB) 的特性。具体信息体现在 LE 如何运作，LAB 如何容纳 LE 组，以及 LAB 接口如何与 Cyclone® IV 器件中的其他模块 连接。 逻辑单元 逻辑单元 (LE) 在 Cyclone IV 器件结构中是最小的逻辑单位。LE 紧密且有效的提供了 高级功能的逻辑使用。每个 LE 有以下特性： ■ 一个四口输入的查找表 （LUT)，以实现四种变量的任何功能 ■ 一个可编程的寄存器 ■ 一个进位链连接 ■ 一个寄存器链连接 ■ 可驱动以下的相互连接： ■ 本地 ■ 行 ■ 列 ■ 寄存器链 ■ 直联 ■ 寄存器套包支持 ■ 寄存器反馈支持 © 2009 Altera Corporation. All rights reserved. ALTERA, ARRIA, CYCLONE, HARDCOPY, MAX, MEGACORE, NIOS, QUARTUS and STRATIX words and logos are trademarks of Altera Corporation and registered in the U.S. Patent and Trademark Office and in other countries. All other words and logos identified as trademarks or service marks are the property of their respective holders as described at /common/legal.html. Altera warrants performance of its semiconductor products to current specifications ISO in accordance with Alteras standard warranty, but reserves the right to make changes to any products and services at any time without notice. Altera assumes no responsibility or 9001:2008 liability arising out of the application or use of any information, product, or service described herein except as expressly agreed to in writing by Altera. Altera customers are advised Registered to obtain the latest version of device specifications before relying on any published information and before placing orders for products or services. Cyclone IV 器件手册， 卷1 2011 年11 月