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1Introduction
1.1PurposeofthePeripheral
1.2Features
User'sGuide
SPRU986B–November2007
DDR2MemoryController
ThisdocumentdescribestheDDR2memorycontrollerintheTMS320DM643xDigitalMediaProcessor
(DMP).
TheDDR2memorycontrollerisusedtointerfacewithJESD79D-2AstandardcompliantDDR2SDRAM
devices.MemoriestypessuchasDDR1SDRAM,SDRSDRAM,SBSRAM,andasynchronousmemories
arenotsupported.TheDDR2memorycontrolleristhemajormemorylocationforprogramanddata
storage.
TheDDR2memorycontrollersupportsthefollowingfeatures:
•JESD79D-2AstandardcompliantDDR2SDRAM
•256Mbytememoryspace
•Databuswidthof32or16bits(seethedevice-specificdatamanualforthemode(s)thatare
supported)
•CASlatencies:2,3,4,and5
•Internalbanks:1,2,4,and8
•Burstlength:8
•Bursttype:sequential
•1CSsignal
•Pagesizes:256,512,1024,and2048
•SDRAMautoinitialization
•Self-refreshmode
•Prioritizedrefresh
•Programmablerefreshrateandbacklogcounter
•Programmabletimingparameters
•Little-endianoperatingmode
SPRU986B–November2007DDR2MemoryController7
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