MC92305 Datasheet, PDF (1/4 Pages) Motorola, Inc – 16/32/64/128/256 QAM RECEIVER AND REED-SOLOMON DECODER

MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Current Information @ www.mot.com/ADC
MC92305
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16/32/64/128/256 QAM RECEIVER AND
REED-SOLOMON DECODER
The MC92305 is a high performance digital demodulator/decoder optimized for
demodulation and block error correction of QAM signals used in Digital Video Broad-
cast by Cable (DVB-C) and DAVIC 1.0 compliant applications.
Feature Summary
• Single A/D IF interface
• Maximum signaling rate of 7Mbaud (42Mbits/sec for 64 QAM and
56Mbits/sec for 256 QAM)
• DVB compliant QAM Coherent Demodulator
• Transversal/Decision Feedback adaptive equalizer
No external components or control required
• Micro-reflection cancellation up to 1.4µs
• Nyquist baseband filtering (α=0.15)
• 1-bit Σ∆ control outputs for AGC, VCO and optional external NCO
• Programmable De-Interleaving For MPEG Transport Packets
• DVB Compliant (204,188,16) Reed Solomon Decoding
• DVB Compliant PRBS Descrambling
• 0.5 micron CMOS, 3.3V technology
• I²C Interface for control/monitoring of system
RESETB
I&Q[9:0]
AGCOUT
ADCLKOUT
VCOOUT
IQSWAP
CTLOUT
ADCLKIN
DMODLOCK
SYMFE
MSSLOCK
SDATA
DOUT[7:0]
IN_FMT
DO_VAL
SCLK
FRAME_SYNCH
BITCLK
FRAME_ERR
FRAME_START
Ordering Information
Device
Package
MC92305CD
80QFP
10
I &Q
SYMFE
RESETB
IN_FMT
ADCLKOUT
CTLOUT
VCOOUT
AGCOUT
MSSLOCK
DMODLOCK
ADCLKIN
16/32/64/128/256
QAM DEMOD.
Symbol
To Byte
Mapping
RAM
APLL
BITCLK
Synch Word
Synchronization
Programmable
De-Interleaver
Reed-Solomon
Decoder
FRAME_SYNCH
PRBS
8
Descrambler
DOUT
FRAME_START
FRAME_ERR
DO_VAL
I²C Interface
SCLK
SDATA
Figure 1. MC92305 Block Diagram
This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice.
© MOTOROLA, INC. 1997
4/9/97