数字设计原理与实践答案整理.pdf

1.3 ASIC Application-Specific Integrated Circuit CAD Computer-Aided Design CD Compact Disc CO Central Office CPLD Complex Programmable Logic Device DIP Dual In-line Pin DVD Digital Versatile Disc FPGA Field-Programmable Gate Array HDL Hardware Description Language IC Integrated Circuit IP Internet Protocol LSI Large-Scale Integration MCM Multichip Module MSI Medium-Scale Integration NRE Nonrecurring Engineering PBX Private Branch Exchange PCB Printed-Circuit Board PLD Programmable Logic Device PWB Printed-Wiring Board SMT Surface-Mount Technology SSI Small-Scale Integration VHDL VHSIC Hardware Description Language VLSI Very Large-Scale Integration     1.4 ABEL Advanced Boolean Equation Language CMOS Complementary Metal-Oxide Semiconductor JPEG Joint Photographic Experts Group MPEG Moving Picture Experts Group OK 据说是Oll Korrect （All Correct ）的缩写。但没有公认答案。 PERL Practical Extraction and Report Language   1.5    ex., 显示器， 投影仪， 各种智能家电                          2.11  原码  反码 补码  (a) +25    (b) +120   (c) +82    (d) –42       (e) –6        (f) –111         2.17    原题“具有相同的负值”意思不明，指原码和补码相等的话即可。    2.22      假设|x|大于等于|y|，  case1：x 正，y 正，补码表示不带来改变，等式显然成立；  n n n case2：x 正，y 负，左边答案等于|x|‐|y|，右边[y]等于|x|+2 ‐|y|=2 +|x|‐|y|，模掉 2 ，右边也 等于|x|‐|y|；  n n n case3：x 负，y 正，左边答案等于 2 ‐||x|‐|y||=2 ‐|x|+|y|，右边也等于 2 ‐|x|+|y|；  n n n n case4：x 负，y 负，左边等于 2 ‐(|x|+|y|