CD Digital Signal Processor with Built-in Digital Servo and DAC
Description
The CXD3021R is a digital signal processor LSI for
CD players. This LSI incorporates a 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 (DSP) Block
? Playback mode supporting CAV (Constant Angular
Velocity)
? Frame jitter free
? 0.5· to 32· continuous playback possible with a
low external clock
? Allows relative rotational velocity readout
? Wide capture range playback mode
? Spindle rotational velocity following method
? Supports 1· to 32· playback by switching the
built-in VCO
? The bit clock, which strobes the EFM signal, is
generated by the digital PLL.
? Digital PLL master clock can be set to 2/3 the
conventional one.
? EFM data demodulation
? Enhanced EFM frame sync signal protection
? Refined super strategy-based powerful error
correction
C1: double correction, C2: quadruple correction
Supported during 32· playback
? Noise reduction during track jumps
? Auto zero-cross mute
? Subcode demodulation and Sub-Q data error
detection
? Digital CLV spindle servo (built-in oversampling filter)
? 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
? Digital Out can be generated from the audio serial
inputs.
? Supports three types of DA interface
(48 bits/64 bits/32 bits)
? DSP, servo and DAC blocks support sleep mode.
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 and surf brake functions supporting micro
two-axis
? Tracking filter: 6 stages
Focus filter: 5 stages
? Servo drive DAC output possible
Digital Filter and DAC Blocks
? Digital de-emphasis
? Digital attenuation
? 8fs oversampling filter
? Adoption of a tertiary ?∑ noise shaper
? Supports double-speed playback
Structure
Silicon gate CMOS IC
Absolute Maximum Ratings
? Supply voltage VDD –0.3 to +4.4 V
? Input voltage VI –0.3 to +4.4 V
(VSS – 0.3 to VDD + 0.3) V
? Output voltage VO –0.3 to +4.4 V
? Storage temperature Tstg –40 to +125 °C
? Supply voltage difference VSS – AVSS –0.3 to +0.3 V
VDD – AVDD –0.3 to +0.3 V
Recommended Operating Conditions
? Supply voltage VDD
*
3.0 to 4.0 V
? Operating temperature Topr –20 to +75 °C
*
The VDD (min.) for the CXD3021R varies according
to the playback speed and built-in VCO selection.
The VDD (min.) for the CXD3021R under various
conditions are as shown on the following page.
– 1 –
E98209A9Z-PS
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.
CXD3021R
120 pin LQFP (Plastic)
