Description

The CXD2587Q is a digital signal processor LSI for CD players. This LSI incorporates a digital servo, digital filter, zero detection circuit, 1-bit DAC and analog low-pass filter.

Features

Digital Signal Processor (DSP) Block

• 1×, 2×, 4× speed playback supported

• 16K-RAM

• EFM data demodulation

• Enhanced EFM frame sync signal protection

• SEC strategy-based error correction

• Subcode demodulation and Sub Q data error detection

• Digital spindle servo

• 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

• Digital audio interface outputs

• Digital level meter, peak meter

• CD TEXT data demodulation

Digital Servo (DSSP) Block

• Microcomputer software-based flexible servo control

• Offset cancel function for servo error signal

• Auto gain control function for servo loop

• E:F balance, focus bias adjustment function

• Surf jump function supporting micro two-axis.

Digital Filter, DAC and Analog Low-pass Filter Blocks

• DBB (digital bass boost) function

• Double-speed playback supported

• Digital de-emphasis

• Digital attenuation

• 8Fs oversampling filter

• S/N: 100dB or more (master clock: 384Fs, typ.) Logical value 109dB

• THD + N: 0.007 or less (master clock 384Fs, typ.)

• Rejection band attenuation: –60dB or less

Applications

CD players