Texas Instruments TMS320C6457 Bedienungsanleitung PDF herunterladen (Seite 51)

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Endianness

Figure 61. Data Memory

63:62 61:56 55:50 49:44 43:38 37:32 31:30 29:24 23:18 17:12 11:6 5:0

RSVD SP9 SP8 SP7 SP6 SP5 RSVD SP4 SP3 SP2 SP1 SP0

Figure 62. EN = 1 (Little-Endian Mode) Rate = 1/2

Word Word

N + 1 N

SP9 SP8 SP7 SP6 SP5 SP4 SP3 SP3 SP3 SP0

0 A1' 0 0 X1 0 0 0 0 X0

Word Word

N + 3 N + 2

SP9 SP8 SP7 SP6 SP5 SP4 SP3 SP3 SP3 SP0

0 A3' 0 0 X3 0 0 0 A2 X2

Figure 63. EN = 0 (Big-Endian Mode) Rate = 1/2

Word Word

N N + 1

SP4 SP3 SP2 SP1 SP0 SP9 SP8 SP7 SP6 SP5

0 0 0 A0 X0 0 A1' 0 0 X1

Word Word

N + 2 N + 3

SP4 SP3 SP2 SP1 SP0 SP9 SP8 SP7 SP6 SP5

0 0 0 A2 X2 0 A3' 0 0 X3

Figure 64. EN = 1 (Little-Endian Mode) Rate = 1/3

Word Word

N + 1 N

SP9 SP8 SP7 SP6 SP5 SP4 SP3 SP2 SP1 SP0

0 A1' 0 A1 X1 0 A0' 0 A0 X0

Word Word

N + 3 N + 2

SP9 SP8 SP7 SP6 SP5 SP4 SP3 SP2 SP1 SP0

0 A3' 0 A3 X3 0 A2' 0 A2 X2

Figure 65. EN = 0 (Big-Endian Mode) Rate = 1/3

Word Word

N N + 1

SP4 SP3 SP2 SP1 SP0 SP9 SP8 SP7 SP6 SP5

0 A0' 0 A0 X0 0 A1' 0 A1 X1

Word Word

N + 2 N + 3

SP4 SP3 SP2 SP1 SP0 SP9 SP8 SP7 SP6 SP5

0 A2' 0 A2 X2 0 A3' 0 A3 X3

Figure 66. EN = 1 (Little-Endian Mode) Rate = 1/4

Word Word

N + 1 N

SP9 SP8 SP7 SP6 SP5 SP4 SP3 SP2 SP1 SP0

B1' A1' 0 A1 X1 B0' 0 B0 A0 X0

Word Word

N + 3 N + 2

SP9 SP8 SP7 SP6 SP5 SP4 SP3 SP2 SP1 SP0

B3' A3' 0 A3 X3 B2' 0 B2 A2 X2

SPRUGK1 – March 2009 TMS320C6457 Turbo-Decoder Coprocessor 2 51

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