L64780 LSI Logic Corporation, L64780 Datasheet - Page 72

• Manufacturer Part Number: L64780
• Description: Dvb-t Cofdm Demodulator Technical Manual 2/00
• Manufacturer: LSI Logic Corporation

4.4.3 Address Line 0x09
4-20
SOFTBIT
BDI_DISABLE
SDI_DISABLE
DOF_OUTPUT_FORMAT
Register Descriptions
0x09
SOFTBIT
7
Soft Decision Number of Bits
This bit determines if a 3-bit (0) or a 4-bit (1) soft decision
is used. The initial condition for this bit is 1.
BDI Disable
If this bit is 1, the Bit Deinterleaver is disabled; if this bit
is 1, the Bit Deinterleaver is enabled. The initial condition
for this bit is 0, the Normal Operational Mode.
SDI Disable
If this bit is 1, the Symbol Deinterleaver is disabled; if this
bit is 0, the Symbol Deinterleaver is enabled. The initial
condition for this bit is 0, the Normal Operational Mode.
Chip Output Format
These bits select the output format of the L64780 towards
the FEC decoder chip. The different formats are
described in
There are three modes:
DISABLE
BDI_
When in Nonhierarchical mode, two submodes are
provided: Serial and Parallel. In Serial Mode, data is
presented only on SD0. In Parallel Mode, data is pre-
sented on SD0 and SD1.
When in Hierarchical mode with only one FEC chip,
either the HP stream or the LP Stream is presented.
6
DISABLE
SDI_
5
Section 3.4, “Microprocessor Interface.”
DOF_OUTPUT_
4
FORMAT
3
DISABLE
DDFS_
2
DDFS_
MODE
1
R/W [4:3]
ADCON
R/W 7
R/W 6
R/W 5
0