Embedded system hardware composition - embedded system hardware architecture

The embedded system core board is composed of

        The structure of embedded system hardware platform is mainly divided into 2 Most of the ： One part is the system motherboard , For embedded minimum systems , Include ARM CPU、flash Memory 、SDRAM、 A serial port 、 Keyboard and other basic parts , As shown above . The other part is the system expansion board , The function modules used to complete different hardware are provided , As shown in the figure below .

 

  Embedded system expansion board

        At present, embedded processors mainly include Power PC、68000、MIPS、ARM Series etc. . The target chip of this textbook is based on ARM（Advanced RISC Machines） Of s3c6410. Common embedded peripheral devices include storage devices 、 Communication equipment and display equipment . Related supporting hardware includes display card 、 storage medium （ROM and RAM etc. ）、 Communication equipment 、IC Card or credit card reading equipment, etc . Embedded system is different from general computer processing system , It does not have a storage medium as large as a hard disk , Most of them use flash memory （flash Memory） As a storage medium .

Typical embedded hardware system

（1） Forward channel （ Input interface ）： Analog input interface （ sensor 、 filter 、 amplifier ）+ Digital input interface

（2） Backward passage （ Output interface ）： Analog output interface + Digital output interface

（3） Human computer interaction channel ： keyboard 、 Touch screen 、LED、LCD

（4） Interconnected communication channels ： Ethernet interface 、USB Interface 、 A serial port 、485、232、IIC、IIS、SPI、CAN、WiFi、 Bluetooth, etc