Cascade2
™
DTV Demodulator IC
DVD
Digital Camera
Driving the Digital Lifestyle
Digital TV
Imaging
IP Core
Product Brief
Description
Zoran Corporation
1390 Kifer Road
Sunnyvale, CA 94086-5305
Te l 408.523.6500
Fax 408.523.6501
www.zoran.com
The Cascade2 is a multistandard demodulator and decoder for
terrestrial and cable TV reception. It is designed to support 8/16-VSB
in compliance with the ATSC Digital Television Standard as well as
OpenCable ITU-T J.83B in compliant 256/64 QAM and OOB QPSK
modes for Digital Cable Ready downstream reception.
The Cascade2 is designed to reduce system costs by integrating the
FAT channel demodulation of VSB, J.83 Annex B QAM and Audio
decoding (for analog channels) and the FDC QPSK channel
demodulation.
The small, high-performance Cascade2 is well suited for any system
designed to receive off-air and cable digital TV transmissions. This
includes stand-alone SDTV or HDTV sets, Set-Top Boxes, PC-TV
cards and data reception appliances.
The Cascade2 family ICs are produced in several combinations of
reception standards:
Cascade2 P/N
CAS-220
CAS-220/C
CAS-220/S
CAS-220/CS
CAS-220/CO
CAS-220/CSO
VSB
Decscription
ATSC
QAM
Annex B
OOB
FDC
US
Audio
BTSC
Korea
Audio
A2FM
FM
Radio
Smart
Antenna
VSB, QAM
VSB, BTSC
VSB, QAM, BTSC
VSB, QAM, OOB
VSB, QAM, BTSC,OOB
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
FEC
•
•
•
•
•
•
•
•
•
•
•
•
System Block Diagram
IF Input
Mux
SIF Input
10-bit
ADC
Programmable Digital Filters
and other
DSP Blocks
Parallel MPEG2 TS Out
FAT AGC
AGC
MPEG2 Mux and
Serializer
Serial MPEG2 Transport
Parallel MPEG2 TS In
CLK0
Osc
Main
PLL
Sound
Decoder
DSP
General Purpose I/O Pins
Internal
Clocks
FDC LO
LO
Firmware
RAM
IIS Output
FDC AGC
AGC
FDC IF In
ADC
FDC QPSK
Demodulator
FDC data Out
Tuner IIC
Switch
Host IIC
Cascade2 front end system solution without OOB
25MHz
Cascade2 front end system solution with OOB
FAT - Forward App Transport
CVBS
Antenna
BTSC 4.5 MHz
54-860MHz
LNA
Spliter
Tuner
IF
44MHz
VSB
SAW
Tuner I2C
Cascade2
IF
Tuner
44MHz
SAW filter
and IF AGC
BPF
IF AGC PWM
LPF
NTSC
demod
2nd IF Sound (4.5 MHz)
ADC
Tuner I2C
Audio
I2S
Host I2C
ADC
Data
MPEG 2TS
Cable
In/Out
BPF
70-130
MHz
FAT IF
Input
Cascade2
FDC IF Input
Mixer
BPF
Local
Oscillator
25MHz
SIF (Option)
FM IF (Option)
CVBS
OOB tuner
11/05 IN
CAS-220
ZORAN [ ZORAN CORPORATION ]
