6.2 TCP2 Input Configuration Register 0 (TCPIC0)Registers
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The TCP2 input configuration register 0 (TCPIC0) is shown in Figure 33 and described in Table 6 . TCPIC0configures the TCP.
Figure 33. TCP2 Input Configuration Register 0 (TCPIC0)
31 30 16
Rsvd FL
R/W-0 R/W-0
15 14 13 12 11 10 8
Reserved NUMSW OUTF INTER Reserved RATE
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
7 3210
Reserved OPMOD Reserved
R/W-0 R/W-0 R/W-0
LEGEND: R/W = Read/Write; R = Read only; - n= value after reset
Table 6. TCP2 Input Configuration Register 0 (TCPIC0) Field Descriptions
Bit Field Value Description
31 Reserved 0 Reserved. The reserved bit location is always read as 0. A value written to this field has no effect.
30-16 FL 40- Frame length. Frame size (should not include tail symbols).20730
15 Reserved 0 Reserved. The reserved bit location is always read as 0. A value written to this field has no effect.
14 NUMSW Number of slide window per sub-block
0 Block size 3 128
1 Block size >128
13 OUTF Output parameters read flag (SA mode only, must be set to 0 for SP mode).
0 No REVT generation. Output parameters are not read via EDMA3.
1 REVT generation for output parameters for EDMA3 read.
12 INTER Interleaver write flag. Only used in standalone mode.
0 Interleaver table is not sent to the TCP2
1 Interleaver table is sent to the TCP2
11 Reserved 0 Reserved. The reserved bit location is always read as 0. A value written to this field has no effect.
10-8 RATE Code rate = 1/rate except for 0 = 3/4
7-3 Reserved 0 Reserved. The reserved bit location is always read as 0. A value written to this field has no effect.
2-1 OPMOD 0-3h Operational mode. This two bit signal defines the processing mode for the TCP2. If the size of theframe is less than or equal to 20,730, then the TCP2 is in the more efficient standalone mode. If thesize of the frame is greater than 20,730, then the TCP2 is in shared mode.
00 Standalone mode
01 Shared-processing mode first subframe
10 Shared-processing mode middle subframe
11 Shared-processing mode last
Shared mode breaks the frame into smaller frames called subframes. The size of each subframe(except the last subframe) must be an integer multiple of 256. For subframe equations, seeFigure 17 .
0 Reserved 0 Reserved. The reserved bit location is always read as 0. A value written to this field has no effect.
In the above register, when the OPMOD field is 01b, it represents the first subframe, 10b representsmiddle subframes, and 11b represents the last subframe. The TCP2 needs to know which type ofsubframe it is processing so that it can correctly initialize the prolog sections.
TMS320C6457 Turbo-Decoder Coprocessor 228 SPRUGK1 – March 2009Submit Documentation Feedback