CS98000 Cirrus Logic, Inc., CS98000 Datasheet - Page 22

• Manufacturer Part Number: CS98000
• Description: DVD Video Processor
• Manufacturer: Cirrus Logic, Inc.

at up to 96 KHz. The audio interface also includes
a flexible PCM input interface, which can input a
wide range of protocols from an audio ADC or an
IEC-958 receiver.
3.11
The soft modem processing is handled by one of
the RISC processors, which is typically dedicated
for that function. Data rates up to 56 Kbits (V.90
protocol) are supported. The CS98000 interfaces to
a simple external CODEC/DAA circuit using a
flexible serial interface. The serial interface is a ful-
ly programmable, bi-directional interface and can
be used either as a PCM interface or as an AC97 in-
terface. In PCM mode, the sample size could be ad-
justed to 20, 18 or 16 bits to match common DAC
and ADC formats, or any other specific size. In
AC97 mode, any slot can be used to interface either
a modem CODEC or an audio CODEC.
3.12
The Digital Video Interface provides flexible and
powerful means of outputting digital video data to
external devices in CCIR601/3 and CCIR656 for-
mats. The interface directly supports NTSC/PAL
video encoding, in both master and slave synchro-
nization configurations. The internal frame buffer
format could be 4:2:0, 4:2:2, YUV655, RGB565
and RGB555. Cirrus Logic provides some easy-to-
use utilities in order to get the best advantage of the
powerful video filtering capabilities of the
CS98000.
NTSC/PAL video decoder input interface. The in-
terface accepts CCIR601, CIF, and QCIF formats,
out of many TV decoders on the market. The video
processor also allows overlay of multiple video
planes
picture_in_picture / on_screen display / cursor).
CS98000 has been proven to work with many TV
encoders on the market with brands such as: Crys-
tal, Brooktree, ADI, and AVS.
22
Soft Modem
Video
(main
The
CS98000
video
/
also
video
features
input
an
/
The Video Input Scaler (VIS) module inputs 8-bit
digital video data from a camera or PAL/NTSC de-
coder, optionally down-scales to SIF or QSIF, and
stores the data in one to three DRAM frame buff-
ers. The scaled image, with a border, can be over-
laid anywhere on the screen into a ½ or ¼-screen
sized window by the Picture in Picture (PIP) mod-
ule.
An alternate method of using the Video Input func-
tion is to input a full sized picture and present it on
the screen full size (bypass mode). In this mode, the
PIP module can place full motion DVD images in
the small window. An internal glitch-free mux can
switch the video processor clock source from the
internal clock to the Video Input clock, allowing
the PIP mode to switch back and forth on the fly,
with no dropout.
4. MEMORY MAP
4.1
The CS98000 externally supports up to 32 Mbytes
DRAM and 16 Mbytes ROM/NVRAM.
Table 11
memory map as viewed by the RISC processors,
and identifies whether each segment is mapped or
cacheable.
For
CS98000 memory, see CS98000 Memory Interface
User’s Manual (DS525UMD1).
4.2
Table 11 on page 23
viewed by host slave port.
4.3
Table 10, Table 11, and Table 12
ternal I/O space is mapped between general regis-
ters, internal SRAM ports, and the RISC
processors’ debug port.
detailed
Processor Memory Map
Host Port Memory Map
Internal I/O Space Map
and
Table 12
information
lists the memory map as
on the next page list the
on
show how the In-
CS98000
programming
Table
10,