LC78631E Overview
EN 5342 CMOS LSI LC78631E pact Disk Player DSP Overview The LC78631E is a pact 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...
LC78631E Key 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: ±8 frames
- Frame synchronization signal detection, protection, and insertion
- Dual interpolation adopted in the interpolation circuit
- EFM data demodulation
- Subcode demodulation