Preliminary Information
OR51132
Demodulator
Company Confidential
October 2002
Oren Semiconductor, Inc.
2700 Augustine Drive, Suite 155, Santa Clara, CA 95054 tel: 408.330.0300 fax: 408.330.0305
www.oren.com
rev.
0.1
The OR51132 is a sophisticated DSP-based demodulator IC. The OR51132 demodulates ATSC VSB,
QAM and analog NTSC TV transmission.
OR51132 Simplified Block Diagram
The OR51132 builds on Oren's powerful and efficient demodulator DSP technology, adding accelerated 8-VSB for ATSC demodulation.
The OR51132 also processes NTSC video signals and translates the incoming signals to baseband output. BTSC audio is demodulated
and decoded. Unlike competitive solutions that use inflexible pipe-line signal processing circuitry, Oren uses adaptable filter blocks
controlled by a central DSP processor. This proprietary implementation results in many application benefits:
Superior Modulation Flexibility
VSB ATSC demodulation
64/256-QAM demodulation for DVB-C and OpenCableTM
applications (ITU-T j.83 A/B/C)
NTSC video demodulation baseband output
BTSC audio decoder
Ideal for iDTVs, set-tops, and PC products
Excellent VSB Performance
Superior VSB multi-path, adjacent channel rejection with
adjustable -6 to +44
s coverage by 576-tap full equalizer
(not sparse tap)
Handles large carrier offset (+/-500khz) using the
embedded search algorithm
Fast channel acquisition and recover algorithms, with both
blind and trained equalization
Dynamically programmable matched filters compensate for
carrier frequency offset, and adjacent channel interference
Comprehensive FEC Integration
Reed-Solomon decoder
Soft Viterbi decoder
Autonomous Operation
Internal firmware execution eliminates supervision and
operation by the system host
Internal DSP controls all aspects of operation including
filter training and re-acquisition
Automatic adjustments are made for impairments like
NTSC interference and phase noise
Low Power
Power dissipation is less than 1.0 Watt using 3.3V
peripheral, and 1.8V core supplies
Standard 128-pin QFP package
Advanced System Functions
Accepts 44MHz or low-IF from the tuner eliminating
external base-band demodulation
Separate RF and IF AGC outputs with adaptive tuner
gain delay and loop parameters
Fast channel re-lock through restoration of channel
parameters
Internal NCO clock source eliminates external VCXO
requirements
Via IIC, the OR51132 independently calculates and
reports FEC statistics, receiver status, and channel data
such as S/N ratio, equalizer taps, carrier offset, and
more.
Flexible Firmware Initialization Options
Three firmware loading options:
- IIC serial bus from host
- Auto-boot from SPI memory chip
- Auto-boot from ROM interface
Approximately 20kB firmware space
OR51132
Program m able Digital
Filters, FFT, and other
DSP Blocks
DS P P ro cesso r
RF
Tuner
NC O
Firm w are
RAM
FE C
Circuits
AG C
IIC Host Interface
General Purpose I/O P ins
SPI or RO M Interface
M PEG -2 T ransport Stream
(P arallel or S erial Form at)
10-bit
ADC
RF
AG C
IF
AG C
10-bit
ADC
NT S C A ud io C o re
IIS O utput
NTSC Audio
AUD IO
AG C
NTSC baseband video
PDF 
ZIP