CXD3027R データシートの表示（PDF） - Sony Semiconductor

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CXD3027R

CD Digital Signal Processor with Built-in Digital Servo + Shock-Proof Memory Controller + Digital High & Bass Boost

Sony Semiconductor 

CXD3027R

CD Digital Signal Processor with Built-in Digital Servo +

Shock-Proof Memory Controller + Digital High & Bass Boost

Description

The CXD3027R is a digital signal processor LSI for CD

players. This LSI incorporates a digital servo, high & bass

boost, shock-proof memory controller, 1-bit DAC and

analog low-pass filter.

120 pin LQFP (Plastic)

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 (DSP) Block

• Supports CAV (Constant Angular Velocity) playback

• Frame jitter free

• 0.5× to 4× speed continuous playback possible

• Allows relative rotational velocity readout

• Wide capture range playback mode

• Spindle rotational velocity following method

• Supports 1× to 4× speed playback

• Supports variable pitch playback

• 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

Supported during 4× speed playback

• Noise reduction during track jumps

• Auto zero-cross mute

• Subcode demodulation and subcode-Q data error

detection

• Digital spindle servo

• 16-bit traverse counter

• Asymmetry correction 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

• VCO control mode

• CD TEXT data demodulation

• Digital Out can be generated from the audio serial input.

(also supported after shock-proof and digital bass boost

processing, subcode-Q addition function)

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 functions

• Surf jump function supporting micro two-axis

• Tracking filter: 6 stages

Focus filter: 5 stages

Shock-Proof Memory Controller Block

• Supports an external 4M-bit/16M-bit DRAM

• Time axis-based data linking

• ADPCM compression method (uncompressed/4 bits/

6 bits/8 bits)

Digital Filter, DAC and Analog Low-pass Filter Blocks

• Digital dynamic bass boost and high boost

Bass Boost: 4th-order IIR 24dB/Oct

+10dB/+14dB/+18dB/+22dB

High Boost: Second-order IIR 12dB/Oct

+4dB/+6dB/+8dB/+10dB

• Independent turnover frequency selection possible

Bass Boost: 125Hz/160Hz/200Hz

High Boost: 5kHz/7kHz

• Digital dynamics (compressor)

Volume increased by +5dB at low level

• 8× oversampling digital filter

(attenuation: 61dB, ripple within band: ±0.0075dB)

• Digital signal output possible after boost

• Serial data format selectable from (output) 20 bits/

18 bits/16 bits (rearward truncation, MSB first)

• Digital attenuation: – ∞, –60 to +6dB, 2048 steps (linear)

• Soft mute

• Digital de-emphasis

• High-cut filter

Applications

CD players

Structure

Silicon gate CMOS IC

Absolute Maximum Ratings

• Supply voltage

VDD, AVDD –0.3 to +4.6

V

• Input voltage

VI

–0.3 to +4.6

V

(VSS – 0.3V to VDD + 0.3V)

• Output voltage

VO

–0.3 to +4.6

V

• Storage temperature Tstg

–40 to +125

°C

• Supply voltage difference

AVSS – VSS –0.3 to +0.3

V

AVDD – VDD –0.3 to +0.3V (AVDD < 2.2V)

AVDD – VDD –0.3 to +1.4V (AVDD = 2.2 to 3.6V)

Recommended Operating Conditions

• Supply voltage VDD , AVDD0, 3 2.2 to 3.6

V

AVDD1, 2, DVDD VDD to 3.6

V

• Operating temperature Topr

–20 to +75

°C

I/O Pin Capacitance

• Input capacitance CI

12 (max.)

pF

• Output capacitance CO

12 (max.)

pF

Note) Measurement conditions VDD = VI = 0V

fM = 1MHz

Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by

any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the

operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.

–1–

E99431E17

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