Driving the Digital Lifestyle
Cascade2™
DVD
Digital Camera
Digital TV
Imaging
IP Core
DTV Demodulator IC
Zoran Corporation
1390 Kifer Road
Sunnyvale, CA 94086-5305
Te l 408.523.6500
Fax 408.523.6501
www.zoran.com
Product Brief
Description
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 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:
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.
US
Audio
BTSC
Korea
Audio
A2FM
QAM
Annex B
OOB
FDC
FM
Smart
Cascade2 P/N
Decscription
ATSC
Radio Antenna
CAS-220
VSB
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CAS-220/C
CAS-220/S
CAS-220/CS
CAS-220/CO
CAS-220/CSO
VSB, QAM
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VSB, BTSC
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VSB, QAM, BTSC
VSB, QAM, OOB
VSB, QAM, BTSC,OOB
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System Block Diagram
IF Input
FEC
Parallel MPEG2 TS Out
Programmable Digital Filters
and other
10-bit
ADC
Mux
SIF Input
DSP Blocks
MPEG2 Mux and
Serializer
Serial MPEG2 Transport
FAT AGC
CLK0
AGC
Parallel MPEG2 TS In
Main
Sound
Decoder
Osc
PLL
DSP
General Purpose I/O Pins
Internal
Clocks
Firmware
RAM
FDC LO
FDC AGC
FDC IF In
LO
IIS Output
AGC
FDC QPSK
Demodulator
ADC
FDC data Out
Tuner IIC
Switch
Host IIC
Cascade2 front end system solution with OOB
Cascade2 front end system solution without OOB
CVBS
25MHz
FAT - Forward App Transport
Antenna
Cascade2
BTSC 4.5 MHz
Tuner
IF
54-860MHz
LNA
FAT IF
Input
Spliter
ADC
ADC
BPF
LPF
Tuner
IF
VSB
44MHz
SAW filter
Data
MPEG 2TS
Cable
In/Out
44MHz
SAW
and IF AGC
IF AGC PWM
Tuner I2C
Cascade2
NTSC
demod
BPF
70-130
MHz
2nd IF Sound (4.5 MHz)
Tuner I2C
Audio
I2S
Mixer
FDC IF Input
BPF
Local
Oscillator
Host I2C
OOB tuner
SIF (Option)
FM IF (Option)
CVBS
25MHz
11/05 IN
CAS-220