Filter
Top Products
www.ti.com
PRODUCT PREVIEW
TMS320C6454
Fixed-PointDigitalSignalProcessor
SPRS311A–APRIL2006–REVISEDDECEMBER2006
Table2-3.TerminalFunctions(continued)
SIGNAL
TYPE
(1)
IPD/IPU
(2)
DESCRIPTION
NAMENO.
ACE5V27O/ZIPU
EMIFAmemoryspaceenables
ACE4V28O/ZIPU
•Enabledbybits28through31ofthewordaddress
ACE3W26O/ZIPU
•Onlyonepinisassertedduringanyexternaldataaccess
Note:TheC6454devicedoesnothaveACE0andACE1pins
ACE2W27O/ZIPU
ABE7W29O/ZIPU
ABE6K26O/ZIPU
ABE5L29O/ZIPU
EMIFAbyte-enablecontrol
ABE4L28O/ZIPU
•Decodedfromthelow-orderaddressbits.Thenumberofaddressbitsor
byteenablesuseddependsonthewidthofexternalmemory.
ABE3AA29O/ZIPU
•Byte-writeenablesformosttypesofmemory.
ABE2AA28O/ZIPU
ABE1AA25O/ZIPU
ABE0AA26O/ZIPU
EMIFA(64-BIT)-BUSARBITRATION
AHOLDAN26OIPUEMIFAhold-request-acknowledgetothehost
AHOLDR29IIPUEMIFAholdrequestfromthehost
ABUSREQL27OIPUEMIFAbusrequestoutput
EMIFA(64-BIT)-ASYNCHRONOUS/SYNCHRONOUSMEMORYCONTROL
EMIFAexternalinputclock.TheEMIFAinputclock(AECLKINorSYSCLK4
AECLKINN29IIPDclock)isselectedatresetviathepullup/pulldownresistorontheAEA[15]pin.
Note:AECLKINisthedefaultfortheEMIFAinputclock.
AECLKOUTV29O/ZIPDEMIFAoutputclock[atEMIFAinputclock(AECLKINorSYSCLK4)frequency]
Asynchronousmemorywrite-enable/Programmablesynchronousinterface
AAWE/ASWEAB25O/ZIPU
write-enable
AARDYK29IIPUAsynchronousmemoryreadyinput
AR/WW25O/ZIPUAsynchronousmemoryread/write
AAOE/ASOEY28O/ZIPUAsynchronous/Programmablesynchronousmemoryoutput-enable
Programmablesynchronousaddressstrobeorread-enable
•Forprogrammablesynchronousinterface,ther_enablefieldintheChip
SelectxConfigurationRegisterselectsbetweenASADSandASRE:
ASADS/ASRER26O/ZIPU
–Ifr_enable=0,thentheASADS/ASREsignalfunctionsastheASADS
signal.
–Ifr_enable=1,thentheASADS/ASREsignalfunctionsastheASRE
signal.
SubmitDocumentationFeedbackDeviceOverview27