Description The CXD2586R/-1 is a digital signal processor LSI for CD players. This LSI incorporates the digital servo, digital filter and 1-bit DAC. Features • All digital signal processing during playback is performed with a single chip • Highly integrated mounting possible due to a built-in RAM Digital Signal Processor Block • Playback mode which supports CAV (Constant Angular Velocity) • Frame jitter free • Half-speed to octuple-speed continuous playback possible with a low external clock (only CXD2586R-1 supports up to octuple speed) • Allows relative rotational velocity readout • Wide capture range playback mode • Spindle rotational velocity following method • Supports normal-speed, double-speed, quadruple speed, sextuple-speed and octuple-speed playback (only CXD2586R-1) • Wide frame jitter margin (±28 frames) due to a built-in 32K RAM • The bit clock, which strobes the EFM signal, is generated by the digital PLL • EFM data demodulation • Enhanced EFM frame sync signal protection • Refined super strategy-based powerful error correction C1: double correction, C2: quadruple correction • Octuple-speed (only CXD2586R-1), sextuple-speed, quadruple-speed and double-speed playback (digital signal processor and digital servo blocks) • Noise reduction during track jumps • Auto zero-cross mute • Subcode demodulation and Sub Q data error detection • Digital spindle servo (with oversampling filter) • 16-bit traverse counter • Asymmetry compensation circuit • CPU interface on serial bus • Error correction monitor signal, etc. output from a new CPU interface • Servo auto sequencer • Fine search performs track jumps with high accuracy • Digital audio interface outputs • Digital level meter, peak meter • Bilingual compatible Digital Servo Block • Microcomputer software-based flexible servo control • Servo error signal, offset cancel function • Servo loop, auto gain control function • E:F balance, focus bias adjustment function Digital Filters (DAC and LPF blocks) • Low-pass filter for DAC • Digital de-emphasis • Digital attenuation • 4fs oversampling filter • Adopts secondary ∆∑ noise shaper • LPF for DAC analog output
|