cx23881 Conexant Systems, Inc., cx23881 Datasheet - Page 2

• Manufacturer Part Number: cx23881
• Description: Pcl Audio/video Broadcast Decoder
• Manufacturer: Conexant Systems, Inc.

PCl Audio/Video
Broadcast Decoder
CX23880 Overview
The CX23880 is designed to offer global support
for all analog video broadcast standards in
addition to digital broadcasts via an external channel
demodulator. It is also designed to offload the CPU
of decoding tasks for High Level MPEG-2 (HDTV),
4:2:2 de-interlacing and progressive-scan DVD via
a dedicated ViP 2 Host Port interface to the CX23490
high-level MPEG-2 Decoder.
CX23881 Overview
The CX23881 is a 100% pin-compatible and software-
compatible subset of the CX23880. It is particularly
suited to the European marketplace and therefore
does not support BTSC-dBX and EIAJ audio as
broadcast in the U.S. and Japan. In addition, the ViP
host port is not supported on the CX23881 as there is
no requirement for supporting high-level MPEG-2
decoding for digital television applications. Main
Feature
Video A/Ds
Y/C separation
Decoded video data output
Video data input
Broadcast audio
Audio input
Audio output
MPEG data streaming
Bi-directional streaming
data ports
Power supply
C X 2 3 8 8 0 / C X 2 3 8 8 1
Luma Notch and Chroma Comb
Mono line level or I
Fusion 878A
BTSC Mono
Via GPIO
Via GPIO
I
2
8-bit
S port
N/A
N/A
5V
2
S port
Adaptive multi-line 2-D comb filter
8- or 10-bit ITU-R 656 4:2:2 output
8-bit ITU-R 656/VIP 2.0 pixel input
Stereo DACs, I
BTSC dbx, NICAM, A2, EIAJ, FM
Dedicated 80 Mbps MPEG port
and VIP 2.0 host master port
Intel/Motorola host port
Level MPEG-2 decoding for DVB broadcast applications
is supported via a dedicated MPEG port for streaming
of compressed data streams to the host for software-
based decompression.
Both the CX23880 and CX23881 support a general
purpose host port for connection to external CODECs
for compression of analog video/audio broadcasts
that can be stored on the host’s hard disk or played
back in software.
Analog Video Capture Overview
PAL/SECAM composite and s-video decoder, image
resizer/scaler, Direct Memory Access (DMA) controller
and Peripheral Component Interface (PCI) bus
master on a single device. The CX23880/CX23881
can place video data directly into host memory for
video capture applications and into a target video
display frame buffer for video overlay applications.
Stereo I
The CX23880/CX23881 integrates a 10-bit NTSC/
CX23880
3.3/1.8V
10-bit
2
S port or PCI Bus
2
S port
d i g i t a l
i n f o t a i n m e n t
Adaptive multi-line 2-D comb filter
8- or 10-bit ITU-R 656 4:2:2 output
8-bit ITU-R 656/VIP 2.0 pixel input
Stereo DACs, I
Dedicated 80 Mbps MPEG port
Intel/Motorola host port only
NICAM, A2, FM
Stereo I
CX23881
3.3/1.8V
10-bit
2
S port or PCI Bus
2
S port
p r o d u c t s