cs98200-cr Cirrus Logic, Inc., cs98200-cr Datasheet - Page 30

• Manufacturer Part Number: cs98200-cr
• Description: Highly-integrated Processor Tommorrow Players Receivers
• Manufacturer: Cirrus Logic, Inc.

CS98200
Next Generation DVD Processor
functions such as watchdog timers and perfor-
mance monitoring.
The large number of general purpose I/Os of-
fers flexibility in system configurations. An I
master allows for control of other I
such as a video encoder. An I
shares the same pins, and can be used for debug
functions. Interrupts can be generated on specif-
ic or generic events. Infrared inputs can be fil-
tered to make them free of glitches or stored
unfiltered into memory. Control of all the inter-
nal clocks is also possible. There are two sepa-
rate PLLs that are clocked by the 27 MHz clock
input. One PLL generates the main clock and
DRAM interface clock, and the second gener-
ates the Audio 256X/384X clock.
5.6
The CS98200 has a programmable interface port
which can be configured to connect to industry
standard CD/DVD loaders without external
glue logic. The CD/DVD interface fully sup-
ports many popular CD/DVD loaders. The in-
terface consists of DVD control and data ports
and an optional CD control/data port.
The CS98200 hardware manages the DVD inter-
face and moving data to an arbitrary size input
FIFO in DRAM. The same interface pins can be
optionally configured as a generic 16-bit host
master port. In this mode, the CS98200 can con-
trol up to four devices (using 4 chip select out-
puts), each of which may use different protocol
and timing. The interface can be set up in ATA-
PI mode, to connect directly to any
ATAPI DVD loader (using two chip selects). Si-
multaneously, the other two chip selects can be
configured to connect to other devices, such as a
super I/O chip or hard disk.
A third option is to configure the interface for
micro-less DVD loader operation, which may
also be configured to connect without external
glue logic.
30
DVD/ATAPI Interface
Copyright 2002 Cirrus Logic (All Rights Reserved)
2
C slave port
2
C devices,
2
C
5.7
The CS98200 has a 4-pin serial port which inter-
faces to the data port of popular low-cost DVD
loaders. This type of loader provides for low
system cost by eliminating the track buffer, in-
terface FIFO, and flow control logic. The
CS98200 contains a large internal SRAM to han-
dle high burst data rates, without requiring re-
verse flow control. The CS98200 performs error
detection, sector number tracking, and interrupt
generation.
5.8
Compressed MPEG data is read from the DVD
disk into an input FIFO in DRAM. The data flow
(DMA) controller moves Video packets from the
input FIFO into the MPEG decoder’s input FIFO
(also in DRAM). The DMA controller can also
perform advanced functions such as start code
search, relieving the RISC processors. The Sys-
tem Synchronization function is used to control
the timing of MPEG picture decoding. The
MPEG Video decoder processes I, B, and P
frames, and writes to video frame buffers in
DRAM for output to the display. Special anti-
tearing logic ensures that currently displayed
frame buffers are not overwritten.
5.9
Compressed Audio data is read from the DVD
disk into an input FIFO in DRAM. The data is
decompressed, then written to a PCM output
FIFO, also in DRAM. Presentation time stamps
(PTS) are extracted from the stream to update
the STC, in order to maintain audio/video syn-
chronization.
The DMA and decompression stages of audio
processing can be done with a combination of
the DMA unit, DSP, and RISC processors. The
DSP is optimized for audio processing, so most
common formats can be handled by the DSP
alone, including AC-3, DTS, MPEG2 audio, and
MP3. The DSP has enough reserve bandwidth
Serial DVD Interface
MPEG Video Decoding
Audio Processing
DS581PP2