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SM320C6455-EP
FIXED-POINTDIGITALSIGNALPROCESSOR
SPRS462B–SEPTEMBER2007–REVISEDJANUARY2008
Table3-1.C6455DeviceConfigurationPins(AEA[19:0],ABA[1:0],andPCI_EN)(continued)
CONFIGURATIONIPD/
NO.FUNCTIONALDESCRIPTION
PINIPU
(1)
HPIperipheralbuswidthselect(HPI_WIDTH).
0HPIoperatesinHPI16mode(default).
HPIbusis16bitswide;HD[15:0]pinsareusedandtheremainingHD[31:16]
pinsarereservedpinsintheHi-Zstate.
AEA14R25IPD
1HPIoperatesinHPI32mode.
HPIbusis32bitswide;HD[31:0]pinsareused.
AppliesonlywhenHPIfunctionofHPI/PCImultiplexedpinsisselected(PCI_ENpin=0).
DeviceEndianmode(LENDIAN).
AEA13R27IPU0SystemoperatesinBigEndianmode.
1SystemoperatesinLittleEndianmode(default).
UTOPIApinfunctionenablebit(UTOPIA_EN).
ThispinselectsthefunctionoftheUTOPIA/EMACandUTOPIA/MDIOmultiplexedpins.
0UTOPIApinfunctiondisabled;EMACandMDIOpinfunctionenabled(default).
ThismeansallmultiplexedUTOPIA/EMACandUTOPIA/MDIOpinsfunctionas
EMACandMDIOpins.TheinterfaceusedbyEMAC/MDIO(MII,RMII,GMIIor
AEA12R28IPD
thestandaloneRGMII)iscontrolledbytheMACSEL[1:0]pins(AEA[10:9]).
1UTOPIApinfunctionenabled;EMACandMDIOpinfunctiondisabled.
ThismeansallmultiplexedUTOPIA/EMACandUTOPIA/MDIOpinsnowfunction
asUTOPIA.TheEMAC/MDIOperipheralcanstillbeusedwithRGMII
(MACSEL[1:0]=11).
ForproperC6455deviceoperation,thispinmustbeexternallypulledupwitha1-kΩresistor
AEA11T25IPD
atdevicereset.
EMACInterfaceSelects(MACSEL[1:0]).
ThesepinsselecttheinterfaceusedbytheEMAC/MDIOperipheral.
0010/100EMAC/MDIOwithMIIInterface[default]
0110/100EMAC/MDIOwithRMIIInterface
1010/100/1000EMAC/MDIOwithGMIIInterface
[M25,
AEA[10:9]IPD
1110/100/1000EMAC/MDIOwithRGMIIInterface
M27]
IftheUTOPIApinfunctionisselected[UTOPIA_EN(AEA12pin)=1]formultiplexed
UTOPIA/EMACandUTOPIA/MDIOpins,theEMAC/MDIOperipheralcanonlybeusedwith
RGMII.
FormoredetailedinformationontheUTOPIA_ENandMAC_SEL[1:0]controlpinselections,
seeTable3-3.
PCII2CEEPROMAuto-Initialization(PCI_EEAI).
PCIauto-initializationviaexternalI2CEEPROM
0PCIauto-initializationthroughexternalI2CEEPROMisdisabled.ThePCI
peripheralusesthespecifiedPCIdefaultvalues(default).
AEA8P25IPD
1PCIauto-initializationthroughexternalI2CEEPROMisenabled.ThePCI
peripheralisconfiguredthroughexternalI2CEEPROMprovidedthePCI
peripheralpinsareenabled(PCI_EN=1).
Note:IfthePCIpinfunctionisdisabled(PCI_ENpin=0),thispinmustnotbepulledup.
AEA7N27IPDForproperC6455deviceoperation,donotopposetheIPDonthispin.
PCIFrequencySelection(PCI66).
SelectstheoperatingfrequencyofthePCI(either33MHzor66MHz).
0PCIoperatesat33MHz(default)
AEA6U27IPD
1PCIoperatesat66MHz
Note:IfthePCIpinfunctionisdisabled(PCI_ENpin=0),thispinmustnotbepulledup.
McBSP1pinfunctionenablebit(MCBSP1_EN).
SelectswhichfunctionisenabledontheMcBSP1/GPIOmultiplexedpins.
0GPIOpinfunctionenabled(default).
AEA5U28IPD
ThismeansallmultiplexedMcBSP1/GPIOpinsfunctionasGPIOpins.
1McBSP1pinfunctionenabled.
ThismeansallmultiplexedMcBSP1/GPIOpinsfunctionasMcBSP1pins.
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