Compact disc player mp3 decoder – Sanyo EP93F User Manual

Page 11

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LC78648NEH

LC78684E

RESB

SBCK

SBSY

SFSY

C2FIN

DATAIN

DATACK

LRSY

VPDO

CKOUT

VCOC

VPRFR

CKIN

OVF

CNTOK

WOK

WEB

OEB

CASLB

CASUB

RASB

CMDIN

CMDOUT

INTB

MADRS[12:0]

MDATA[15:0]

STREQ
STCK
STDAT

CRCF

ADLRCK
ADBCK
ADDATA

FSYNC

Audio I/F

M
U
X

MP3

Decoder

Data-I/F

CDROM
Decoder

Anti-Shock

Compressed, uncompressed

DRAM-I/F

System

Clock-gen

VCO

PLL

CPU-I/F

PHLPF/RFMON

LPF

EXTERNAL

AUDIO IN

CLOCK

GENERATOR

PLL

JITTER/DETECT

SLICE LEVEL

CONTROL

TRACKING

ERROR

PROCESSOR

FOCUS ERROR

PROCESSOR

RF SIGNAL

PROCESSOR

APC

VREF

MONITOR

D/A

SERVO

PROCESSEROR

RAM

DRF

CPU I/F

PORT

MONITOR SIGNAL

SELECTOR

ERROR

CORRECTION

INTERPOLATION

MUTE

ATTENUATION

8FS DIGITAL

FILTER

DEEMPHASIS

AUDIO OUT

1bit DAC

SERIAL

OUT

SUBCODE DECODE CRC &

TEXT

FRAME SYNC

DETECT,PROTECT

INSERT

EFM DECODE

RUPTURE

DEFECR

D/A

AUTO

ADJUST

TRACK

JUMP

CLA
CAV

CONTROL

FDO
TDO
SPDO
SLDO

AVDD1
AVSS
AVDD2

DEFECT

DRF

VPB

CL
CE
DI
DO
WRQB

CONT1 to 6
OUT1

FSEQ

FSX
EFLG
C2F

MONI 1 to 5

DOUT

LRSY
DATACK
DATA

DVDD
DVDD
DVSS
DVSS

VREF

LDD
LDS

LPF

AIN
CIN
BIN
DIN

FEC

EIN
FIN

TEC

TEIN

JITTC

SLCO

EFMIN

PDO1
PDO2

PCKIST

VVDD
VVSS

XVDD
XVSS

XIN

XOUT

F16MIN

F16MOUT

ASLRCK

ASDACK

ASDFIN

RVDD

RCHO

LRVSS

LCHO

LVDD

RESB

TEST

IOMODE

RAM

Car Audio

■

Playback functions

◆

Playback speeds: 1 , 2 - CD-R/W: 1 , 2

◆

Jitter-free playback (VCEC)

■

RF processing block

◆

RF system: AGC, CD-R and R/W playback, peak hold, bottom hold

◆

Error system: Variable balance TE signal playback, FE signal playback

◆

Detection: Track count signal, jitter, defect (black and mirror)

◆

Laser power control

◆

DC offset voltage cancellation

■

Servo control block

◆

Implements all servo functions (tracking, focus, sled, and spindle) in digital

◆

Automatic control function: Focus gain, focus bias, focus offset, tracking

gain, tracking offset, tracking balance

◆

Mechanical shock detection

◆

Interruption detection

Super System-on-Chip Digital Servo IC with On-Chip RF System

: Use of conditional products requires
consultation with a SANYO representative
prior to the use of the device.

The LC78648NEH integrates, on a single chip, the RF signal processing, servo control, EFM signal processing,
and audio signal processing required for audio CD playback.
This single IC can perform all the CD data signal processing required to convert the signal read from the disc to
an analog audio signal. A basic CD player system can be implemented with just three ICs
(this IC, a microcontroller, and a driver IC) and a minimal number of external components.

Features

Overview

Features

Overview

Block Diagram

:This product is subject to change without notice for improvement. When considering the use of this
product, first refer to the latest SANYO "Semiconductor News" publication related to this device and
finally refer to the latest specifications for the device.

■

EFM processing block

◆

Error detection and correction (C1: double, C2: double)

◆

Jitter margin:

4 frames

◆

DOUT output

◆

Built-in text decoder

◆

EFM signal sync detection, protection, and interpolation

■

Audio processing block

◆

Interpolation (4 sample interpolation)

◆

Digital attenuator

◆

Deemphasis filter

◆

1-bit D/A converter (third-order

∆∑

noise shaper converter)

◆

8 oversampling digital filters

◆

Fadeout function

◆

Bilingual function

◆

Built-in second-order audio output low-pass filter

◆

Supports external supply of the digital filter and D/A converter clock

■

Supply voltage: 3.3 V

■

Package: QFP80 (14 14)

❋

: Use of conditional products requires
consultation with a SANYO representative
prior to the use of the device.

❋

Conditional

Product

Conditional

Product

Conditional

Product

Conditional

Product

Under

development

Under

development

■

MP3 (MPEG audio standard ISO/IEC 11172-3 layer 3) decoder functions

◆

Decoding and output as a digital audio signal of MP3 data decoded by the CD-ROM decoder

◆

Supports all bit rates including variable bit rate decoding

◆

Supports the following sampling frequencies

◆

MPEG1 (Fs = 32, 44.1, and 48 kHz)

◆

MPEG2 (Fs = 16, 22.05, and 24 kHz)

◆

MPEG2.5 (Fs = 8, 11.025, and 12 kHz)

◆

Supports readout of the MPEG header information and ancillary information

◆

Provides automatic muting on CRC errors using an MP3 CRC check function

◆

MPEG data external serial input function supports memory card playback

■

CD-ROM decoder functions

◆

Support for CD-ROM mode 1 and mode 2 (form 1 and form 2)

◆

CD-ROM error correction function for faithful decoding of data written to CD-ROM discs

◆

Header and sector management

◆

Supports up to 4 speed playback

◆

In addition to data buffering also supports C2 error flag buffering

◆

Can provide external serial output of the decoded CD-ROM data

■

CD-DA playback functions (anti-skip support)

◆

Up to 180 seconds of skip-proof operation when 64M of DRAM is used

◆

Provides compressed/uncompressed selection as well as a data through output function

◆

VCEC (variable speed) function supports up to 4 speed playback

■

Audio signal processing

◆

Serial audio signal output using the LRCK, BCK, and DATA signals

(Output supports the I

S format, 16- or 20-bit PCM output precision, 16-, 24-, and 32-bit output modes selectable for data-slot output)

◆

Digital bass boost function (4 modes), attenuator function, and muting (-

∞

, -12 dB) function

◆

Base clock (384 Fs) output pin for external digital filters and D/A converter

■

DRAM interface

◆

Supports use of 1 to 64M bits of external memory (EDO, 2 CAS, 16-bit data bus memory)

◆

A user area can be allocated in DRAM during CD-ROM (MP3) playback

■

Supply voltages

◆

Internal: 1.8 V

◆

I/O: 3.3 V

◆

Analog system: 3.3 V

■

Package: QFP80 (14 14)

Compact Disc Player MP3 Decoder

The LC78684E integrates, on a single chip, CD-ROM signal-processing functions, MP3 signal-processing
functions, and CD-DA anti-skip signal-processing functions.
These signal-processing functions are implemented as hard-wired circuits for reduced power consumption.
The LC78684E, in combination with a CD DSP, DRAM, an audio D/A converter, and other devices can
implement CD players that provide playback of MPEG layer 3 (MP3) audio recorded on CD media as well as
anti-skip CD-DA playback.

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