System-on-a-Chip (SoC) Device Supports 48× Speed CD-ROM Drives
Digital Signal-processing IC for CD-ROM Systems
CXD3030R
A CD-ROM playback speed of 48× 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 in-
stalling application software.
The CXD3030R system-on-a-Chip (SoC) product represents an opti-
mal selection for compact basic design, energy-saving design, and
increased speed.
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Implements all the digital signal
processing required for playback
in a single chip.
Integrates digital servo control,
digital signal processing, a CD-
ROM decoder, ATAPI interface,
and DRAM on a single chip.
Playback speeds: Up to 48×
Provides even higher mounting
densities by including on-chip
RAM.
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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 48×.
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 cap-
ture PLL circuit allows the CXD3030R
to be freely set up to get the maximum
performance from the drive mechanism,
providing support for both CAV tech-
niques 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 ac-
cess 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 48×. 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 al-
lows 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 integrat-
ing 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 48×.
When I joined Sony, 2× 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 in-
creasing 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 experi-
ence this speed directly.
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