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参数资料
| 型号： | LC895297 |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP176 |
| 封装： | SQFP-176 |
| 文件页数： | 1/9页 |
| 文件大小： | 212K |
| 代理商： | LC895297 |
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
CMOS LSI
22898HA (OT) No. 5785-1/9
Preliminary
SANYO: SQFP176
[LC897297]
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-0005 JAPAN
Full CAV 20×
× CD-ROM Decoder with
Built-in ATA-PI (IDE) Interface and CD-DSP
LC895297
Ordering number : EN*5785
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| LC8955 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:CD-1 Format ADPCM Data Replay LSI |
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