MC92300CG Motorola, MC92300CG Datasheet

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MC92300CG

Manufacturer Part Number
MC92300CG
Description
VITERBI Decoder for Digital TV
Manufacturer
Motorola
Datasheet
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Product Preview
VITERBI Decoder for Digital TV
Digital-TV applications according to the EBU defined DVB transmission standard for
satellite and cable Set-Top systems.
Viterbi Decoder - Capability Specification
MOTOROLA, INC. 1997
This document contains information on a new product.
Specifications and information herein are subject to change without notice.
Operates at max. 50MBits/s output rate to work with all present DVB channels
Implements K=7, (171
with a survivor depth of 96
Code rate and synchronization control programmable via I
Automatic rate selection and signal quality output (qval)
Full/empty flag generation of input FIFO for system monitoring of VDCLK/BITCLK
ratio
Simplified system design with internal PLL for the generation of output BITCLK
from the incoming VDCLK for all depuncturing modes
Available in a 128QFP package
This product preview describes a high performance device, a Viterbi Decoder, for
VDCLK
VC1[2:0]
VC2[2:0]
SYMCLK
RESET_N
8
,133
Synchronizer
8
) Viterbi decoder for rates 1/2, 2/3, 3/4, 5/6 and 7/8
VFF
Figure 1. Viterbi Decoder Block Diagram
VLCK
SR
QVAL
APLL
FIFO
VTSTI[1:0]
2
2
Depuncturing
C standard serial bus
VEF
SCL DSA SDA
I
Interface
2
C
7
Viterbi
Core
Current Information@www.mot.com/ADC
MC92300CG
Ordering Information
Device
BIT-
CLK
VO
MC92300
RESET_N
VC0,VC1[2:0]
VDCLK
VTSTI[1:0]
SDA
DSA[6:0]
SCL
SYMCLK
DTVVIT
BITCLK
SR[2:0]
Package
128QFP
VLCK
VEF
VFF
VO
5/28/97

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MC92300CG Summary of contents

Page 1

... APLL VLCK 2 SR VTSTI[1:0] QVAL Figure 1. Viterbi Decoder Block Diagram Current Information@www.mot.com/ADC MC92300 DTVVIT BITCLK RESET_N VC0,VC1[2:0] VDCLK SYMCLK VTSTI[1:0] SR[2:0] SDA DSA[6:0] SCL Ordering Information Device Package MC92300CG Viterbi VO Core BIT- CLK Interface 7 SCL DSA SDA VO VLCK VFF VEF 128QFP 5/28/97 ...

Page 2

... Prior to outputting valid data the Viterbi decoder block must synchronize to the input data stream, i.e. remove any phase ambiguity in the received symbols and determine the punctured code rate transmitted MOTOROLA 2 The Viterbi block employs a method known as Syndrom Based Node Synchronization to achieve both I & Q symbol and punctured rate synchronization ...

Page 3

... VTSTI[1:0] - Test pins VTSTO - Test output RESET_ASYNC - Teset for Scan Test TEST_SE - Test pin for Scan Mode TEST_MODE - Test pin for Scan Mode MOTOROLA Device Test Pins: 51, 56-62, 105, 110-115, 120 (don’t connect these pins) NOT CONNECTED Pins: 27, 33, 34, 88-94, 99-102 MOTOROLA 3 ...

Page 4

... Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur ...

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