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SM320C6455-EP
FIXED-POINTDIGITALSIGNALPROCESSOR
SPRS462B–SEPTEMBER2007–REVISEDJANUARY2008
Table3-2.PCI_EN,PCI66,PCI_EEAI,andHPI_WIDTHPeripheralSelection(HPIandPCI)
CONFIGURATIONPINSETTING
(1)
PERIPHERALFUNCTIONSELECTED
PCI66PCI_EEAIHPI_WIDTH
PCI_ENPINHPIDATAHPIDATA32BITPCIPCI
AEA6PINAEA8PINAEA14PIN
[Y29]LOWERUPPER(66-/33-MHz)AUTO-INIT
[U27][P25]
(1)
[R25]
0000EnabledHi-ZDisabledN/A
0001EnabledEnabledDisabledN/A
Enabled
111XDisabled(viaExternalI2C
Enabled
EEPROM)
(66MHz)
110XDisabledDisabled
Disabled
100XDisabled
(defaultvalues)
Enabled
Enabled
(33MHz)
101XDisabled(viaExternalI2C
EEPROM)
(1)PCI_EEAIislatchedatresetasaconfigurationinput.IfPCI_EEAIissetasone,thendefaultvaluesareloadedfromanexternalI2C
EEPROM.
TheUTOPIAandEMAC/MDIOpinsarealsomultiplexedontheC6455device.TheUTOPIA_ENfunction
(AEA12pin)controlsthefunctionofthesemultiplexedpins.TheMAC_SEL[1:0]configurationpins
(AEA[10:9)controlwhichinterfaceisusedbytheEMAC/MDIO.NotethatsincethePCIsharessomepins
withtheUTOPIAperipheral,itsstatealsoaffectstheoperationoftheUTOPIA.Table3-3describesthe
effectoftheUTOPIA_EN,PCI_EN,andMACSEL[1:0]configurationpins.
Table3-3.UTOPIA_EN,andMAC_SEL[1:0]PeripheralSelection(UTOPIAandEMAC)
CONFIGURATIONPINSETTINGPERIPHERALFUNCTIONSELECTED
MAC_SEL[1:0]
UTOPIA_ENPCI_ENPIN
AEA[10:9]PINSEMAC/MDIOUTOPIA
AEA12PIN[R28][Y29]
[M25,M27]
10/100EMAC/MDIOwithMIIInterface
0x00bDisabled
[default]
10/100EMAC/MDIOwithRMII
0x01bDisabled
Interface
10/100/1000EMAC/MDIOwithGMII
0x10bDisabled
Interface
10/100/1000EMAC/MDIOwithRGMII
0x11bDisabled
Interface
(1)
1000b,01b,or10bDisabledUTOPIASlavewithFullFunctionality
10/100/1000EMAC/MDIOwithRGMII
1011bUTOPIASlavewithFullFunctionality
Interface
(1)
UTOPIASlavewithSinglePHYMode
1100b,01b,or10bDisabled
Only
10/100/1000EMAC/MDIOwithRGMIIUTOPIASlavewithSinglePHYMode
1111b
Interface
(1)
Only
(1)RGMIIinterfacerequiresa1.5-/1.8-VI/Osupply.
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