LSI Logic Confidential
4-6
Functional Description
Copyright © 2001, 2002 by LSI Logic Corporation. All rights reserved.
Figure 4.2
DMN-8600 Bitstream Interface
The SBP transfers bitstreams between an 8-bit bitstream bus and a
circular buffer in SDRAM under DMA control from a FIFO buffer. The
SBP operates only in half duplex mode, receiving (incoming) or
transmitting (outgoing) 8-bits of data per clock cycle.
Note:
ATAPI transfers can be interleaved with async master
accesses, but async master accesses can not be
performed while an SD, CD or secondary bitstream port
transfer is in progress.
4.4.3
IEEE 1394 Interface
The IEEE 1394 interface can receive MPEG-2 transport stream or DV
stream data contained in isochronous packets (IPs). The DMN-8600
filters the packets by matching channel ID’s and performs 1394
descrambling on the scrambled data. In case of MPEG-2 transport
streams the DMN-8600 performs descrambling on the data scrambled
with 5C encryption. Software is responsible for transport section
processing and demultiplexing.
For output, DMA channels transfer data from SDRAM to the IEEE 1394
interface. In the case of IEEE 1394 isochronous output, software
prepares the proper IEEE 1394 time stamp in the packet header and
multiplexes packets from different channels together.
4.4.4
Video Interface
The video interface is a programmable high-speed I/O port that supports
the transfer of uncompressed digital video into and out of the DMN-8600
processor. It captures one stream of 8-bit digital video data from an
FIFO
BSP
DMA
Flow Control
SDRAM
Circular
Buffer
Bitstream Data
Bitstream Clock
Содержание DMN-8600
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