LC895297 Datasheet, PDF (1/9 Pages) Sanyo Semicon Device – Full CAV 20 x CD-ROM Decoder with Built-in ATA-PI (IDE) Interface and CD-DSP

Ordering number : EN*5785
Preliminary
CMOS LSI
LC895297
Full CAV 20× CD-ROM Decoder with
Built-in ATA-PI (IDE) Interface and CD-DSP
Overview
The LC895297 is a single-chip CD-ROM decoder and
CD-DSP system that supports full CAV 20× operation and
includes a built-in ATA-PI (IDE) interface.
Functions
• Full CAV 20× CD-DSP and CD-ROM decoder
functions with built-in ATA-PI (IDE) interface
Features
[CD-ROM Decoder and ATA-PI (IDE) Interface Blocks]
• Full CAV 20× operation
• ATA-PI (IDE) interface
• Supports the use of EDO DRAM.
• Supports the use of up to 4 Mbits of buffer RAM.
• The user can set up arbitrary CD main channel and C2
flag areas in buffer RAM.
• Batch transfer function (function that automatically
transfers the CD main channel and C2 flag data in a
single operation.)
• Multi-block transfer function (function that
automatically transfers multiple blocks in a single
operation.)
• DVD ECC interface
• Intelligent functions
[CD-DSP Block]
• The IC inputs a high-frequency signal, slices that signal
at the correct level, converts that result to an EFM coded
signal, and compares the phase with that of the built-in
VCO.
• Uses an external 16.9344-MHz crystal element to
generate a standard clock and to correctly generate the
required internal timings.
• Performs frame synchronization, signal detection,
protection, and insertion, and assures stable data
readout.
• Demodulates the EFM coded signal to produce 8-bit
symbol data.
• After applying a CRC check to the subcode Q signal,
outputs that signal to a microprocessor over a parallel
I/O channel.
• Performs unscrambling and de-interleaving to reorder
the demodulated EFM signal in the prescribed manner.
• Performs error code detection and correction, and flag
processing. (C1: dual errors, C2: four errors)
• Sets the C2 flags based on the C1 flags and a C2 check,
and performs interpolation or muting depending on the
C2 flags. Adopts a 2-point interpolation circuit, and
converges the signal to the muting level if the C2 flags
indicate over 2 consecutive uncorrectable errors.
• Accepts the input of commands from a control
microprocessor over an 8-bit parallel interface. Supports
track jump, disc motor start/stop, muting on/off, and
track counting commands.
• Can perform arbitrary track counts.
• Includes CAV audio functions.
• Adopts zero-cross muting.
• Includes 8× oversampling digital filters.
• D/A converter with PWM output.
• Includes independent left and right channel digital
attenuators.
• Provides digital deemphasis.
• Supports bilingual functions.
Package Dimensions
unit: mm
3230-SQFP176
[LC897297]
SANYO: SQFP176
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-0005 JAPAN
22898HA (OT) No. 5785-1/9