INTRODUCTION

S5L9291X is a signal processing LSI for the CD. Digital processing functions (EFM demodulation, error correction), spindle motor servo processing, compression for anti-rolling and anti-shock, expandable memory control functions (4M, 16M, 64M EDO/Fast Page DRAM and 16M, 32M, 64M, 128M, 256M SDRAM ), 10-band EQ (Equalizer) Filter, CD-Text and 1-bit DAC for the CD-MP3 Interface are installed in S5L9291X.

FEATURES

? Signal processing part

― EFM data demodulation

― Frame sync detection, protection, insertion

― Sub code data processing (Q data CRC check, Q data register installed)

― Error correction (C1: 2 error correction, C2: 4 erasure correction)

― Installed 16K SRAM for De-interleave

― Interpolation

― Digital audio interface

― CLV/pseudo-CAV servo control

― Wide capture range digital PLL ( ± 50)

― CD-Text

― Variable speed CLV Control (′1 to ′2 )

― CD MP3 Interface

? Digital filter, DAC part

― 4 times over sampling digital filter

― Digital de-emphasis

― 10 Band EQ function

― Sigma-delta stereo DAC installed

― Audio L.P.F installed

? Memory control part

― 4/5/6 bit compression and expandable control

― Full bit control

― 4M/16M/64M, ′4, ′8, ′16 EDO/FastPage DRAM Support

― 16M/64M/128M/256M, 32M(16M 2EA), ′8, ′16 SDRAM Support