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System-on-a-Chip (SoC) Device Supports 48x Speed CD-ROM Drives Digital Signal-processing IC for CD-ROM Systems
CXD3030R
A CD-ROM playback speed of 48x has finally been achieved. We can say that the CD-ROM has reached the transfer rates of hard disks only a few years ago. The CD-ROM is now indispensable in personal computers for installing application software. The CXD3030R system-on-a-Chip (SoC) product represents an optimal selection for compact basic design, energy-saving design, and increased speed.
s s s Implements all the digital signal processing required for playback in a single chip. Integrates digital servo control, digital signal processing, a CDROM decoder, ATAPI interface, and DRAM on a single chip. Playback speeds: Up to 48x Provides even higher mounting densities by including on-chip RAM. s
The CXD3030R is a system-on-a-Chip (SoC) product that integrates digital servo control, digital signal processing, a CD-ROM decoder, ATAPI interface, and DRAM on a single chip. It supports playback speeds up to 48x.
Digital Servo Control
While the CD-ROM optical system includes several adjustment points, the CXD3030R can automatically set all of these to optimal values. It includes a 6-stage cascaded digital filter as the tracking filter, and can flexibly support different pickups and playback speeds. The inclusion of an on-chip wide capture PLL circuit allows the CXD3030R to be freely set up to get the maximum performance from the drive mechanism, providing support for both CAV techniques using an FG signal, and partial CAV techniques that take into account the limitations on the speeds the motor can provide. A drive with a short access time can be designed by using the mode in which the VCO is controlled by a microcomputer and the pull-in time after access is minimized.
Digital Signal Processing
The CXD3030R supports playback speeds up to 48x. Since this speed is 48 times the speed at which audio CDs are played back, the CD-ROM certainly has progressed to surprising speeds. The built-in buffered audio play function allows this device to play back CD-DA audio while actually reading the disc in high-speed CAV mode. An extensive set of power saving functions are also provided since an increasingly high percentage of notebook personal computers include a CD-ROM drive. In addition to providing functions that lower power consumption in the standby state, this device also achieves reduced power consumption during playback.
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ATAPI
Sony has led the industry by integrating on a single chip an interface and a decoder that support ATAPI ULTRA DMA (33). It goes without saying that the CXD3030R implements all related operations even while reaching a speed of 48x.
When I joined Sony, 2x speed drives had just been released. It's impressive how far we've come since then. Although the economy has its ups and downs, technology is always progressing. While I know that my fantasies of my salary increasing as fast as technology are unreasonable, I am aware that technology has advanced this far through the efforts of many people in many areas. I recommend that you experience this speed directly.
CXD3030R
Disc RF amp. CXA2581 Digital signal transaction block
ROM decoder block
DRAM
1-bit D/A converter
Audio out
Spindle motor pickup Digital servo block
Driver
Control block
ATAPI interface block
ATAPI bus
Sub CPU
System control microcomputer (SPC970)
s Figure 1 System Block Diagram for 48x Speed CD-ROM System-on-a-Chip LSI System
XTLO 138 VDD VSS PCO FILI FILO CLTV 44 43 42 45
XTLI 139
Data block 32K RAM 1-Mbit DRAM Digital PLL EFM Data processor Clock gen. Address gen. DMA sequencer DMA FIFO
DRVDD
DRVSS
RFAC 47 ASYI ASYO WFCK SCOR 49 50 27 60
110 to 113, 115 to 118, 120 to 123, HDB0 to F 125 to 128
ASY
Sync. protector Timing generator Subcode Q processor CLV processor Auto sequencer
Error correction block Subcode P to W processor CPU Interface (Serial I/F) Digital out CDDSP I/F
Priority resolver ATAPI registers
Subcode deinterleave & ECC
SQCK 62 SQSO 61
12-byte packet FIFO
95, 96 HCS0, 1 97 to 99 HA0 to 2 104 105 102 106 101 100 103 94 93 107 XHRD XHWR XHAC HDRQ HINT XS16 REDY DASP XPDI XHRS
MDP 12 PWMI 13
Main data error correction Descrambler Sync. control Host I/F
Servo block
ADIO 33 RFDC CE TE SE FE VC 34 35 36 37 38 39
FOK MIRR DFCT 8-bit A/D
OP amp. analog SW
D/A converter block 8 Fs 1-bit DAC
DAC I/F Clock gen. Sub CPU I/F
Servo DSP
DAC OP amp.
5
BSSD
4
FAO
3
TAO
2
SAO
58 14 57 56
COUT MIRR DFCT FOK
63 10
DOUT SENS
142 143 135 134
PWM1N PWM2N PWM1P PWM2P
130
XTL2
131
XTL1
69 70 74 75 76
XINT XWR XWAT XRD XCS
77 to 83 84 to 91
A0 to 6 D0 to 7
s Figure 2 CXD3030R Block Diagram

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