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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