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SM320C6455-EP
FIXED-POINTDIGITALSIGNALPROCESSOR
SPRS462B–SEPTEMBER2007–REVISEDJANUARY2008
Table2-3.TerminalFunctions(continued)
SIGNAL
TYPE
(1)
IPD/IPU
(2)
DESCRIPTION
NAMENO.
AED21AD29
AED20AJ28
AED19AF29
AED18AH28
AED17AE29
AED16AG28
AED15AF28
AED14AH26
AED13AE28
AED12AE26
AED11AD26
I/O/ZIPUEMIFAexternaldata
AED10AF27
AED9AG27
AED8AD27
AED7AE25
AED6AJ27
AED5AJ26
AED4AE27
AED3AG25
AED2AH27
AED1AF25
AED0AD25
DDR2MEMORYCONTROLLER(32BIT)-CONTROLSIGNALSCOMMONTOALLTYPESOFMEMORY
DDR2MemoryControllermemoryspaceenable.WhentheDDR2Memory
DCE0E14O/Z
Controllerisenabled,italwayskeepsthispinlow.
DBA2E15O/Z
DBA1D15O/ZDDR2MemoryControllerbankaddresscontrol
DBA0C15O/Z
DDR2CLKOUTB14O/ZDDR2MemoryControlleroutputclock(CLKIN2frequency×10)
DDR2CLKOUTA14O/ZNegativeDDR2MemoryControlleroutputclock(CLKIN2frequency×10)
DSDCASD13O/ZDDR2MemoryControllerSDRAMcolumn-addressstrobe
DSDRASC13O/ZDDR2MemoryControllerSDRAMrow-addressstrobe
DSDWEB13O/ZDDR2MemoryControllerSDRAMwrite-enable
DSDCKED14O/ZDDR2MemoryControllerSDRAMclock-enable(usedforself-refreshmode)
DEODT1A17O/ZOn-dieterminationsignalstoexternalDDR2SDRAM.Thesepinsshouldnotbe
connectedtotheDDR2SDRAM.
Note:Therearenoon-dieterminationresistorsimplementedontheC6455
DEODT0E16O/Z
DSPdie.
DSDDQGATE3F21I
DDR2MemoryControllerdatastrobegate[3:0]
DSDDQGATE2E21O/Z
Forhookupofthesesignals,pleaserefertotheImplementingDDR2PCB
DSDDQGATE1B9I
LayoutontheTMS320C6455applicationreport(literaturenumberSPRAAA7).
DSDDQGATE0A9O/Z
DSDDQM3C23O/ZDDR2MemoryControllerbyte-enablecontrols
•Decodedfromthelow-orderaddressbits.Thenumberofaddressbitsor
DSDDQM2C20O/Z
byteenablesuseddependsonthewidthofexternalmemory.
DSDDQM1C8O/Z
•Byte-writeenablesformosttypesofmemory.
DSDDQM0C11O/Z
•CanbedirectlyconnectedtoSDRAMreadandwritemasksignal(SDQM).
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