MCP215X数据吞吐量
Throughputisbasedonmanyfactors,someofwhich
aredeterminedbytheSecondaryDevice(host
controller+MCP215X)andothersthataredetermined
bythePrimaryDevice.
Thisapplicationnotediscussestechniquesthatwill
improvethedatatransferthroughputbetweenanIrDA
®
standardPrimaryDeviceandembeddedsystemand-
focusonwhattechniquescanbeusedontheinterface
betweenthehostcontrollerandtheMCP215X.The
embeddedsystem(SecondaryDevice)usesa
MCP215XdevicefortheIrDA
®
standardcommunica-
tion(IrCOMM9-wire“cooked”serviceclass).Figure1
showsatypicalIrDAstandardsystem.
Alltimingmeasurementsandscreencapturesinthis
applicationnoteareperformedusingaPalm™
Tungsten™T2PDAasthePrimaryDevice.Usinga
differentPrimaryDevicemayyielddifferentresults.MAN927DataThroughputandtheMCP215XInmanytypicalsystems,themajorityofdatawilltravelAuthor:MarkPalmereitherinonedirectionortheother.Thatis,themajorityMicrochipTechnologyInc.ofdatawillbetransmitted(downloaded)fromthePrimaryDevice(PDA)totheSecondaryDeviceINTRODUCTION(embeddedsystem),orwillbetransmitted(uploaded)
