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