LC78631E Datasheet (Sanyo Semicon Device)

LC78631E, Compact Disk Player DSP

Ordering number : EN 5342 CMOS LSI LC78631E Compact Disk Player DSP Overview The LC78631E is a compact disc D/A signal-processing LSI for CD-ROM drives that provides a variable clock error correction (VCEC) mode.

The LC78631E demodulates the EFM signal from the optical pickup and performs de-interleaving, error detection, error correction, digital filtering, and other processing.

The LC78631E includes an on-chip 1-bit D/A converter, and executes commands sent from a control microprocessor.

LC78631E Features

* VCEC support

* Built-in PLL circuit for EFM detection (supports 4× playback)

* Built-in PLL for variable pitch playback (±13%)

* 18KB RAM on chip

* Error detection and correction (corrects two errors in C1 and four errors in C2)

* Frame jitter margin