Sanyo EP93F manual LC78648NEH

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

Under

Overview

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

Compact Discc PlayerPlayer MP3MP3 DecoderDecoder

Overview

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.

Features

■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

■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)

■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)

❋: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

◆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 I2S 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)

❋: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

Block Diagram

finally refer to the latest specifications for the device.