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SM320C6455-EP
FIXED-POINTDIGITALSIGNALPROCESSOR
SPRS462B–SEPTEMBER2007–REVISEDJANUARY2008
Table2-3.TerminalFunctions(continued)
SIGNAL
TYPE
(1)
IPD/IPU
(2)
DESCRIPTION
NAMENO.
AEA10/MACSEL1M25
•EMAC/MDIOinterfaceselectbits(MACSEL[1:0])
IftheEMACandMDIOperipheralsareenabled,AEA12pin(UTOPIA_EN
AEA9/MACSEL0M27
=0),therearetwoadditionalconfigurationpins—MACSEL[1:0]—to
AEA8/PCI_EEAIP25
selecttheEMAC/MDIOinterface.
AEA[10:9]:MACSEL[1:0]withAEA12=0.
AEA7N27
00-10/100EMAC/MDIOMIIModeInterface(default)
AEA6/PCI66U27
01-10/100EMAC/MDIORMIIModeInterface
AEA5/MCBSP1_ENU28
10-10/100/1000EMAC/MDIOGMIIModeInterface
11-10/100/1000withRGMIIModeInterface
AEA4/
T28
SYSCLKOUT_EN[RGMIIinterfacerequiresa1.8Vor1.5VI/Osupply]
WhenUTOPIAisenabled(AEA12=1),iftheMACSEL[1:0]bits=11then,
AEA3T27
theEMAC/MDIORGMIIinterfaceisstillfunctional.Formoredetailed
AEA2/CFGGP2T26
information,seeSection3,DeviceConfiguration.
AEA1/CFGGP1U26
•PCII2CEEPROMAuto-Initialization(PCI_EEAI)
AEA8:PCIauto-initializationviaexternalI2CEEPROM
IfthePCIperipheralisdisabled(PCI_ENpin=0),thispinmustnotbe
pulledup.
0-PCIauto-initializationthroughI2CEEPROMisdisabled(default).
1-PCIauto-initializationthroughI2CEEPROMisenabled.
•PCIFrequencySelection(PCI66)
[ThePCIperipheralneedsbeenabled(PCI_EN=1)tousethisfunction]
SelectsthePCIoperatingfrequencyof66MHzor33MHzPCIoperating
frequencyisselectedatresetviathepullup/pulldownresistoronthePCI66
pin:
O/ZIPD
AEA6:
0-PCIoperatesat33MHz(default).
1-PCIoperatesat66MHz.
Note:IfthePCIperipheralisdisabled(PCI_EN=0),thispinmustnotbe
pulledup.
•McBSP1Enablebit(MCBSP1_EN)
SelectswhichfunctionisenabledontheMcBSP1/GPIOmuxedpins
AEA5:
AEA0/CFGGP0U25
0-GPIOpinfunctionsenabled(default).
1-McBSP1pinfunctionsenabled.
•SYSCLKOUTEnablepin(SYSCLKOUT_EN)
SelectswhichfunctionisenabledontheSYSCLK4/GP[1]muxedpin
AEA4:
0-GP[1]pinfunctionoftheSYSCLK4/GP[1]pinenabled(default).
1-SYSCLK4pinfunctionoftheSYSCLK4/GP[1]pinenabled.
•ConfigurationGPI(CFGGP[2:0])(AEA[2:0])
Thesepinsarelatchedduringresetandtheirvaluesareshowninthe
DEVSTATregister.Thesevaluescanbeusedbysoftwareroutinesforboot
operations.
Note:ForproperC6455deviceoperation,theAEA11pinmustbeexternally
pulledupatdeviceresetwitha1-kΩresistor.TheAEA3pinmustbepulledup
atdeviceresetusinga1-kΩresistorifpowerisappliedtotheSRIOsupply
pins.IftheSRIOperipheralisnotusedandtheSRIOsupplypinsare
connectedtoV
SS
,theAEA3pinmustbepulleddowntoV
SS
usinga1-kΩ
resistor.
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