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5.1.2APrioriData
5.2OutputDataFormat
Shared-Processing(SP)Mode
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Figure28.EN=0(Big-EndianMode)Rate=1/5
WordWord
NN+1
SP4SP3SP2SP1SP0SP9SP8SP7SP6SP5
B0'A0'B0A0X0B1'A1'B1A1X1
WordWord
N+2N+3
SP4SP3SP2SP1SP0SP9SP8SP7SP6SP5
B2'A2B2A2X2B3'A3'B3A3X3
Figure29.EN=1(Little-EndianMode)Rate=3/4
WordWord
N+1N
SP9SP8SP7SP6SP5SP4SP3SP2SP1SP0
0000X1000A0X0
WordWord
N+3N+2
SP9SP8SP7SP6SP5SP4SP3SP2SP1SP0
0A3'00X30000X2
WordWord
N+5N+4
SP9SP8SP7SP6SP5SP4SP3SP2SP1SP0
0000X30000X2
Figure30.Rate3/4EN=0(Big-EndianMode)Rate=3/4
WordWord
NN+1
SP4SP3SP2SP1SP0SP9SP8SP7SP6SP5
000A0X00000X1
WordWord
N+2N+3
SP4SP3SP2SP1SP0SP9SP8SP7SP6SP5
0000X20A3'00X3
WordWord
N+4N+5
SP4SP3SP2SP1SP0SP9SP8SP7SP6SP5
0000X40000X5
AprioridataforMAP0andMAP1mustbeorganizedasdescribedinFigure31(thebaseaddressmustbe
double-wordaligned).Forbig-endianconfiguration,seeSection7.
Figure31.APrioriData
63:6261:5655:5049:4443:3837:3231:3029:2423:1817:1211:65:0
RSVDAP4AP3AP2AP1AP0RSVDAP9AP8AP7AP6AP5
TheTCP2delivers32-bitword-packedextrinsicdata.Eachextrinsicisa(5,2)number;thatis,SIIII.FF
(whereS=signbit,I=integer,F=fractionalbit)andisright-justifiedwith0inthemost-significant-bit
position.Theirdestinationstoragebaseaddressmustbedouble-wordaligned.Moreover,thebufferlength
mustcontainanevennumberofwords.
TMS320C6457Turbo-DecoderCoprocessor2 24SPRUGK1–March2009
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