Chapter 5 Memory and Memory interface

《Chapter 5 Memory and Memory interface》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、BaiCong2015-2016-18086ArchitectureAddressingModeandInstructionSetAssemblylanguageandProgrammingApplicationMemoryandMemoryInterfacingMemorychipsandtheirapplicationI/OInterfaceI/OchipsandapplicationsandApplicationProcessorMemoryI/ODataBusAddressBusControlBusObjectives

2、Memorydevicesanditsclassification
Memoryarchitecture
PinFunctionforSRAMandEPROM
MemoryInterfaceandApplications
CachememoryKeyterms
Addressdecoder地址译码器
Backupmassstoragesystem海量备份存储系统
Bidirectionalbus双向总线
ChipEnabled(CE)芯片启动
ElectricallyErasableRead-OnlyMemory(EEPROM)

3、电可擦除ROM
ErasableProgrammableRead-OnlyMemory(EPROM)可擦除可编程的ROM
Flashdisk闪存盘
FlashmemoryEPROM闪存EPROM
Floppydisk软盘
MemoryInterface存储器接口
Magneticdisk磁盘
Nonvolatile非易失性
OutputEnable（OE）输出允许
ProgrammableRead-OnlyMemory（PROM）可编程ROM
WriteEnable（WE）写入允许TypicalBUSInterfaceMulti

4、layerstoragenetworkRegisterCacheMemoryDiscMemoryTapeMemoryOpticalDiscMemoryRelationbetweencapacityandspeedisshowninpyramidalconstruction.
Memory：storetheprogramanddataSemiconductorMemoryFundamentals
AmongthemostwidelyusedisRAMandROM.
Memorycapacity
Thenumberofbitstha

5、tasemiconductorchipcanstoreiscalleditschipcapacity(bitsorbytes)
Memoryorganization
Eachmemorychipcontains2xlocationswherexisthenumberofaddresspinsonthechip.
Eachlocationcontainsybits,whereyisthenumberofdatapinsonthechip.
Theentirechipcancontain2x×ybits
Exammemoryorga

6、nizationof4K×4:212=4096locations,eachlocationholding4bits.
Memoryspeed(accesstime)Memorytypes
ROM(ReadOnlyMemory)
ROMisthetypeofmemorythatdoesnotloseitscontentswhenpoweristurnedoff.Itisalsocallednonvolatilememory.
PROM(ProgrammableMemory)
Userprogrammable(one-timepro

7、grammable)memory.
IftheinformationburnedintoPROMiswrong,itneedstobediscardedsinceinternalfusesareblownpermanently.
Specialequipmentneeded:ROMburnerorROMprogrammer.
EPROM(ErasableProgrammableROM)2,000times
AllowsmakingchangesinthecontentsofPROMafteritisburned.
Onecanp

8、rogramthememorychipanderaseitthousandsoftimes.
Erasingitscontentscantakeupto20minutes;theentirechipiserased.
AllEPROMchipshaveawind