Synchronous sequential circuit memory, usually consisting of flip-flops, update circuit states information All flip-flops share a common clock pulse input The clock input is not a binary value representing the time of day but rather a\synchronous\train of pulses. Synchronous memory changes its data only at certain time intervals The flip-flops can change state only on a clock pulse edge

Analysis Analyze existing circuits to determine their function Synchronous sequential circuit The basic modeling structure Two circuit models: Mealy model& Moore model Three approach used to describe the circuit: Logic function equation

Sequential Circuit Models Yo Combinational logic Universal combinational circuit model No memory units No feedback from logic outputs back to the inputs

5001 (a)小 (b)F的电负性比N高,NF3和NH3相比,F3中电子离N远,互斥作用小

Registers, formed from collection of flip -flops, are used to store or manipulate data or both. Input and output function associated with registers include Parallel input/ Parallel output Serial input/ Serial output Parallel input/ Serial output OSerial input parallel output

1.物探及其分类 地球物理场,是指存在于地球内部及其 周围的、具有物理作用的物质空间。例如, 地球內部及其周围具有重力作用的物质空间 称为重力场;天然或人工建立的具有电(磁) 力作用的物质空间称为电(磁场;质点振动 传播的物质空间,称为性波等等

一、概述 二、润滑系油路 三、润滑系主要部件 四、曲轴箱通风

一、概述 二、水冷系 三、风冷系 四、变速器机油冷却系

一、概述 二、配气相位 三、配气机的什 四、变进气系统

一、概述 二、命机体组 三、活塞连杆组 四、曲轴丕轮组