파트넘버.co.kr LC78626E 데이터시트 PDF


LC78626E 반도체 회로 부품 판매점

DSP for Compact Disk Players



Sanyo Semicon Device 로고
Sanyo Semicon Device
LC78626E 데이터시트, 핀배열, 회로
Ordering number : EN5692
CMOS LSI
LC78626E
DSP for Compact Disk Players
Overview
The LC78626E is a monolithic compact disk player signal
processing and servo control CMOS IC equipped with an
internal anti-shock control function. Designed for total
functionality including support for EFM-PLL, and one-bit
D/A converter, and containing analog low-pass filter, the
LC78626E provides optimal cost-performance for low-end
CD players that provide anti-shock systems. The basic
functions provided by this IC include modulation of the
EFM signal from the optical pick-up, deinterleaving,
detection and correction of signal errors, prevention of a
maximum of approximately 10 seconds of skipping, signal
processing such as digital filtering (which is useful in
reducing the cost of the player), and processing of a
variety of servo-related commands from the
microprocessor.
Functions
• When an HF signal is input, it is sliced to precise levels
and converted to an EFM signal. The phase is compared
with the internal VCO and a PLL clock is reproduced at
an average frequency of 4.3218 MHz.
• Precise timing for a variety of required internal timing
needs (including the generation of the reference clock) is
produced by the attachment of an external 16.9344 MHz
crystal oscillator.
• The speed of revolution of the disk motor is controlled
by the frame phase difference signal generated by the
playback clock and the reference clock.
• The frame synchronizing signal is detected, stored, and
interpolated to insure stable data read back.
• The EFM signal is demodulated and converted to 8-bit
symbolic data.
• The demodulated EFM signal is divided into subcodes
and output to the external microprocessor. (Three
general I/O ports are shared [exclusively] for this
purpose.)
• After the subcode Q signal passes the CRC check, it is
output to the microprocessor through a serial
transmission (LSB first).
• The demodulated EFM signal is buffered in the internal
RAM, which is able to absorb ± 4 frame's worth of jitter
resulting from variations in the disk rotation speed.
• The demodulated EFM signal is unscrambled to a
specific sequence, and deinterleaving is performed.
• Error detection and correction is performed, as is a flag
process. (C1: two error/C2: two error correction
method.)
• The C2 flag is set after referencing the C1 flag and the
results of the C2 check, where the signal from the C2
flag is interpolated or held at its previous level. The
interpolation circuit uses double interpolation. When
there are two or more C2 flags in a row, the previous
value is held.
Continued on next page.
Package Dimensions
unit: mm
3151-QFP100E (FLP100)
[LC78626E]
SANYO: QIP100E (FLP100)
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-0005 JAPAN
13098HA(OT) No. 5692-1/32


LC78626E 데이터시트, 핀배열, 회로
LC78626E
Continued from preceding page.
• Command (such as track jump, start focus, disk motor
start/stop, muting on/off, track count, etc.) is are
executed after they are entered from the microprocessor.
(An 8-bit serial input is used.)
• The digital output is equipped internally.
• High speed access is supported through discretionary
track counting.
• Using the 4× oversampling digital filter, D/A converter
signals with improved continuity of output data are
produced.
• A ∆∑-type D/A converter using a 3-order noise shaper is
equipped internally. (An analog low-pass filter is
equipped internally.)
• Internal digital attenuator (8-bit-[ALPHA]; 239 steps.)
• Internal digital deemphasis.
• Uses 0 cross mute.
• Bilingual compatibility.
• General I/O ports: 4. (Three of these are shared,
exclusively, with the subcode output function.)
• Up to ten seconds of skip prevention (when using 4M of
DRAM) through ADPCM compression/decompression
processing. 1M/4M bit DRAM can be selected.
• Memory overflow detection output.
• Free memory output.
Features
• 100-pin QFP
• A single 3.2 V/5 V power supply
No. 5692-2/32




PDF 파일 내의 페이지 : 총 30 페이지

제조업체: Sanyo Semicon Device

( sanyo )

LC78626E data

데이터시트 다운로드
:

[ LC78626E.PDF ]

[ LC78626E 다른 제조사 검색 ]




국내 전력반도체 판매점


상호 : 아이지 인터내셔날

전화번호 : 051-319-2877

[ 홈페이지 ]

IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈

( IYXS, Powerex, Toshiba, Fuji, Bussmann, Eaton )

전력반도체 문의 : 010-3582-2743



일반적인 전자부품 판매점


디바이스마트

IC114

엘레파츠

ICbanQ

Mouser Electronics

DigiKey Electronics

Element14


관련 데이터시트


LC78626

DSP for Compact Disk Players - Sanyo Semicon Device



LC78626E

DSP for Compact Disk Players - Sanyo Semicon Device