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