专业英语嵌入式检索报告

The retrieval report on the embedded Introduction

With the development of information technology, we've gone through the PC era, experiencing the network era, which faces the so-called post-pc Generation to generation.At present, due to the family network and Internet, make consumer electronics, computer, communications (3c) tend to be more integrated, from the people in life to use a mobile phone, PDA, TV, refrigerators and other civil electronic and communication products, to missile, satellite communications, submarines and other military control core, all marked by ES (Embedded system).While in the post-pc era, information home appliances, a new generation of mobile phones and intelligent building more indispensable new applications such as the core technology.This article from the basic concept of embedded type system, key technologies and development prospect of the three parties face embedded type system were introduced.

1 The basic concept of embedded system

1.1 The definition of embedded system

The British association of electrical engineers for embedded system is to define like this: "embedded type system to control, monitor, or auxiliary equipment, machines, and even the factory operating device".Embedded type system must meet the following four characteristics: perform a specific function;Based on the microprocessor and its peripheral;Strict timing and high stability;Fully automatic cycle operation.It is a comprehensive computer software and hardware, and special emphasis on the principle of "tailored", that is, based on a kind of special purpose, for the purpose to develop a specific system, the so-called customization.In the emerging of embedded type system products, common has a mobile phone, PDA, GPS, Set a top box or embedded type server and thin terminals , etc.

1.2 The typical composition of the embedded system

Embedded system is a set of software and hardware can be independent at an organic whole, meet the specific application of firmware.

1.2.1 Hardware system

The diversity of the hardware platform of embedded type system, some small system only 1 K of data space, 16 K application empty, and some high-performance systems such as working frequency up to 1 GHz 64 - bit systems, the FLASH MEMORY of 32 M, 128 M SRAM, it shall be decided by the particular application goal.But the typical embedded system hardware part includes microprocessor, memory, and peripheral devices and 1/0 port, the graphics controller, etc.Is different with general computer systems, it is generally not as large as a hard disk capacity of the storage medium, and often use an EPROM, EEPROM or flash memory as a storage medium.