LC895299W Overview
ENN6249A CMOS IC LC895299W, 895299L 48× Speed ATAPI (IDE) CD-ROM Decoder with On-Chip Digital Servo System Overview The LC895299W and LC895299L are CD-ROM drive digital servo system ICs that integrate all signalprocessing functions after the RF head amplifier on a single chip. Bilingual support Built-in digital audio interface (supports both CLV and CAV) Built-in digital deemphasis Built-in 8× oversampling digital...
LC895299W Key Features
- Supports full CAV operation at 48× speed
- Assures stable data readout by performing frame sync signal detection, protection, and interpolation
- Demodulates the EFM signal to produce 8-bit symbol data
- Applies a CRC check to the subcode Q signal and then outputs that signal via parallel I/O to the system microprocessor
- Performs unscrambling and deinterleaving operations to rearrange the demodulated EFM signal in the stipulated order
- Detects and corrects error signals and processes flags (C1: 2 errors, C2: 4 errors)
- References the C1 flags and the C2 error check result to set the C2 flags and interpolates or mutes the signal depending
- Provides two types of muting: zero-cross muting and soft muting
- Independent left and right channel digital attenuators (8-bit resolution) Provides two types of attenuation: direct atte