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