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TMS320DM6443
digitalmediasystemon-碎片
SPRS282–DECEMBER2005
thedm6443includesavideoprocessingsub-系统(vpss)thathasaconfigurableresizerandvideo
processingback-终止(vpbe)outputusedfordisplay.
theresizeracceptsimagedataforseparatehorizontalandverticalresizingfrom1/4xto4xinincrements
of256/n,wherenisbetween64and1024.
thevideoprocessingback-终止(vpbe)iscomprisedofanon-screendisplayengine(osd)anda
videoencoder(venc).theosdengineiscapableofhandling2separatevideowindowsand2separate
osdwindows.otherconfigurationsinclude2videowindows,1osdwindow,and1attributewindow
allowingupto8levelsofalphablending.thevencprovidesfouranalogdacsthatrunat54mhz,
providingameansforcompositentsc/palvideo,s-video,和/orcomponentvideooutput.thevenc
alsoprovidesupto24bitsofdigitaloutputtointerfacetorgb888devices.thedigitaloutputiscapableof
8/16-bitbt.656outputand/orccir.601withseparatehorizontalandverticalsyncs.
theethernetmediaaccesscontroller(emac)providesanefficientinterfacebetweenthedm644xmpu
coreprocessorandthenetwork.thedm6443emacsupportboth10base-tand100base-tx,or10
mbits/第二(mbps)and100mbpsineitherhalf-orfull-duplexmode,withhardwareflowcontroland
qualityofservice(qos)支持.
themanagementdatainput/输出(mdio)modulecontinuouslypollsall32mdioaddressesinorderto
enumerateallphydevicesinthesystem.onceaphycandidatehasbeenselectedbythempu,这
mdiomoduletransparentlymonitorsitslinkstatebyreadingthephystatusregister.linkchangeevents
arestoredinthemdiomoduleandcanoptionallyinterruptthempu,allowingthemputopollthelink
statusofthedevicewithoutcontinuouslyperformingcostlymdioaccesses.
thei2c,spi,usb2.0,andvlynqportsallowdm6443toeasilycontrolperipheraldevicesand/或者
communicatewithhostprocessors.
Therichperipheralsetprovidestheabilitytocontrolexternalperipheraldevicesandcommunicatewith
externalprocessors.fordetailsoneachoftheperipherals,seetherelatedsectionslaterinthisdocument
andtheassociatedperipheralreferenceguides.
thedm6443hasacompletesetofdevelopmenttoolsforboththearmanddsp.theseincludec
compilers,adspassemblyoptimizertosimplifyprogrammingandscheduling,andawindows™
debuggerinterfaceforvisibilityintosourcecodeexecution.
digitalmediasystem-在-碎片(dmsoc)
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