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參數(shù)資料
| 型號： | LC78624E |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Compact Disc Player DSP(用于CD播放器的8位DSP) |
| 中文描述： | 光碟機(jī)的DSP（用于光盤播放器的8位數(shù)字信號處理器） |
| 文件頁數(shù)： | 1/27頁 |
| 文件大?。?/td> | 357K |
| 代理商： | LC78624E |
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Overview
The LC78624E is a CMOS LSI that implements the signal
processing and servo control required by compact disc
players. Including an EFM-PLL and text decoder, the
LC78624E strictly limits functionality to basic signal
processing and servo system operation to achieve the best
cost-performance balance for low-end players. As basic
functions, the LC78624E provides demodulation of the
EFM signal from the optical pickup, de-interleaving, error
detection and correction, and processes servo commands
sent from the control microcontroller.
Functions
Input signal processing: The LC78624E takes an HF
signal as input, digitizes (slices) that signal at a precise
level, converts that signal to an EFM signal, and
generates a PLL clock with an average frequency of
4.3218 MHz by comparing the phases of that signal and
an internal VCO.
Precise reference clock and necessary internal timing
generation using an external 16.9344 MHz crystal
oscillator
Disk motor speed control using a frame phase difference
signal generated from the playback clock and the
reference clock
Frame synchronization signal detection, protection and
interpolation to assure stable data readout
EFM signal demodulation and conversion to 8-bit
symbol data
Subcode data separation from the EFM demodulated
signal and output of that data to an external
microcontroller
Subcode Q signal output to a microcontroller over the
serial I/O interface after performing a CRC error check
(LSB first)
Serial output to a microcontroller via the text decoder of
the song titles and other text data stored in the Subcode
R through W channels of the read-in area
Demodulated EFM signal buffering in internal RAM to
handle up to ±4 frames of disk rotational jitter
Demodulated EFM signal reordering in the prescribed
order for data unscrambling and de-interleaving
Error detection, correction, and flag processing (error
correction scheme: dual C1 plus dual C2 correction)
The LC78624E sets the C2 flags based on the C1 flags
and a C2 check, and then performs signal interpolation
or muting depending on the C2 flags. The interpolation
circuit uses a dual-interpolation scheme. The previous
value is held if the C2 flags indicate errors two or more
times consecutively.
Support for command input from a microcontroller:
commands include track jump, focus start, disk motor
start/stop, muting on/off and track count (8 bit serial
input)
Built-in digital output circuits.
Arbitrary track counting to support high-speed data
access
Zero cross muting
Supports the implementation of a double-speed dubbing
function.
Support for bilingual applications.
General-purpose I/O ports: 5 pins
Features
64 pin QFP
5 V single-voltage power supply
Package Dimensions
unit: mm
3159-QFP64E
CMOS LSI
20698RM (OT) No. 5811-1/27
SANYO: QIP64E
[LC78624E]
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-0005 JAPAN
Compact Disc Player DSP
LC78624E
Ordering number : EN5811
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LC78625E | SigmaDSP 28-/56-Bit Audio Processor with Two ADCs and Four DACs |
| LC78625 | SigmaDSP 28-/56-Bit Audio Processor with Two ADCs and Four DACs |
| LC78626KE | Compact Disc Player DSP(用于CD播放器的8位DSP) |
| LC78626 | 16-bit fixed point DSP with Flash |
| LC78626E | 16-bit fixed point DSP with Flash |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LC78625 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Compact Disc Player DSP |
| LC78625E | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Compact Disc Player DSP |
| LC78626 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:DSP for Compact Disk Players |
| LC78626E | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:DSP for Compact Disk Players |
| LC78626KE | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CD-Player Processor/Controller |
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