Texas Instruments TURBO-DECODER COPROCESSOR 2 TMS320C6457 DSP Benutzerhandbuch
6.12 TCP2 Input Configuration Register 9 (TCPIC9)
Registers
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The TCP2 input configuration register 9 (TCPIC9) is shown in
and described in
.
TCPIC9 sets the tail bits used by the TCP.
Figure 42. CP2 Input Configuration Register 9 (TCPIC9)
31
18 17
0
Reserved
TAIL4
R/W-0
R/W-0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 16. CP2 Input Configuration Register 9 (TCPIC9) Field Descriptions
Bit
Field
Value
Description
31-18
Reserved
0
Reserved. The reserved bit location is always read as 0. A value written to this field has
no effect.
no effect.
17-0
TAIL4
0-FFFF FFFFh
Tail bit. Values must be set as in the following list.
•
CDMA-2000 Tail Symbol Pattern for Code Rate 1/5
tail+2
tail+1
tail+0
(x20+x20+x20)/3
(x20+x20+x20)/3
(x20+x20+x20)/3
•
CDMA-2000 Tail Symbol Pattern for Code Rate 1/4, 1/3
tail+2
tail+1
tail+0
(x20+x20)/2
(x20+x20)/2
(x20+x20)/2
•
CDMA-2000 Tail Symbol Pattern for Code Rate 1/2 or 3/4
tail+2
tail+1
tail+0
x20
x20
x20
•
CDMA-2000 Tail Symbol Pattern for Code Rate 1/5 or 1/4
tail+2
tail+1
tail+0
x20
x20
x20
•
CDMA-2000 Tail Symbol Pattern for Code Rate 1/3, 1/2, or 3/4
tail+2
tail+1
tail+0
x20
x20
x20
TMS320C6457 Turbo-Decoder Coprocessor 2
36
SPRUGK1 – March 2009