L64777 LSI Logic Corporation, L64777 Datasheet - Page 68
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L64777
Manufacturer Part Number
L64777
Description
DVB Qam Modulator
Manufacturer
LSI Logic Corporation
Datasheet
1.L64777.pdf
(124 pages)
- Current page: 68 of 124
- Download datasheet (989Kb)
4.1.5 Register 4
4.1.6 Register 5
4-6
7
7
6
6
IQ_EX
SCR_OFF
RS_OFF
INT_OFF
SYNC_LENGTH
SYNC_BYTE Sync Reference Pattern
Register Descriptions
5
5
I and Q Channel Exchange
When this bit is 1, the L64777 exchanges the I and Q
channels at the Nyquist filter input. When this bit is 0, the
L64777 leaves the data stream unchanged. The reset
value is 0.
Scrambler Off
When this bit is 1, the L64777 stops the scrambler and
delays the data in this module by three clock cycles.
When this bit is 0, the scrambler runs normally. The reset
value is 0.
Reed-Solomon Off
When this bit is 1, the L64777 stops the Reed Solomon
(RS) encoder and delays the data in this module by two
clock cycles. When this bit is 0, the L64777 runs the RS
encoder normally. The reset value is 0.
Interleaver Off
When this bit is 1, the L64777 stops the interleaver and
delays the data in this module by three clock cycles.
When this bit is 0, the L64777 runs the interleaver in
DVB-compliant mode. The reset value is 0.
Sync Block Length
This register specifies the distance between consecutive
SYNC_BYTE values. Legal register values range from 32
to 255 for sync block length. The reset value is
0b1011 1011.
This register specifies the sync reference pattern. The
reset value is 0b0100 0111.
SYNC_LENGTH
4
4
SYNC_BYTE
3
3
2
2
1
1
R/W [7:0]
R/W [7:0]
R/W 5
R/W 3
R/W 2
R/W 1
0
0
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