L64780 LSI Logic Corporation, L64780 Datasheet - Page 37

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

3.1 Output Interface
3.1.1 Output Format in Nonhierarchical Mode
Chapter 3
Interfaces
This chapter describes the interfaces for the LSI Logic L64780 DVB-T
COFDM Demodulator. It consists of the following sections:
The output interface formats the soft decisions for presentation to the
downstream Viterbi decoder. The input to this block is a stream of four-
bit or 3-bit Viterbi soft decisions from the inner bit deinterleaver. The
output from this block connects to a Viterbi decoder that is external to
the L64780. The output from soft decisions is in a format suitable for
direct connection to the L64724 or L64705.
This block operates differently in nonhierarchical and hierarchical modes,
and can have a serial or parallel output format. This block’s operational
modes are described in the following subsections.
In nonhierarchical mode, the output format can be serial or parallel.
L64780 DVB-T OFDM Demodulator
Section 3.1, “Output Interface,” page 3-1
Section 3.2, “MUXIN Interface,” page 3-8
Section 3.3, “MUXOUT Interface,” page 3-13
Section 3.4, “Microprocessor Interface,” page 3-16
3-1