LC895299W Datasheet, PDF (1/12 Pages) Sanyo Semicon Device – 48 x Speed ATAPI (IDE) CD-ROM Decoder with On-Chip Digital Servo System

Ordering number : ENN6249A
CMOS IC
LC895299W, 895299L
48× Speed ATAPI (IDE) CD-ROM Decoder
with On-Chip Digital Servo System
Overview
The LC895299W and LC895299L are CD-ROM drive
digital servo system ICs that integrate all signal-
processing functions after the RF head amplifier on a
single chip.
Functions
• Built-in digital servo and ATAPI (IDE) CD-ROM,
CD-DSP, CAV audio, and1-Mbit DRAM functions
Features
CD-DSP Block
• Supports full CAV operation at 48× speed
• Assures stable data readout by performing frame sync
signal detection, protection, and interpolation.
• Demodulates the EFM signal to produce 8-bit symbol
data.
• Applies a CRC check to the subcode Q signal and then
outputs that signal via parallel I/O to the system
microprocessor.
• Performs unscrambling and deinterleaving operations to
rearrange the demodulated EFM signal in the stipulated
order.
• Detects and corrects error signals and processes flags
(C1: 2 errors, C2: 4 errors)
• References the C1 flags and the C2 error check result to
set the C2 flags and interpolates or mutes the signal
depending on the C2 flags.
• Provides two types of muting: zero-cross muting and
soft muting.
• Independent left and right channel digital attenuators
(8-bit resolution)
Provides two types of attenuation: direct attenuation and
soft attenuation.
• Bilingual support
• Built-in digital audio interface (supports both CLV and
CAV)
• Built-in digital deemphasis
• Built-in 8× oversampling digital filters
• Built-in D/A converters
CD-ROM Decoder and ATAPI (IDE) Interface
Block
• Built-in ATAPI (IDE) interface
• The user can freely set the CD main channel, C2 flag,
and subcode areas in internal DRAM.
• Batch transfer function (Function for transferring the CD
main channel, C2 flag, or subcode data in a single
operation.)
• Multiple transfer function (Function for transferring
multiple blocks automatically in a single operation.)
• CAV audio functions
• Intelligent functions (auto buffering, auto decoding, and
CD-R functions)
• Subcode P to W buffering function (No ECC) and
CD-TEXT support
• Supports Ultra DMA MODE2, MODE1, and MODE0
• Built in 1-Mbit DRAM
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
13100TH (OT)/31599HA (OT) No. 6249-1/12