System-on-a-Chip (SoC) Device Supports 48脳 Speed CD-ROM Drives
Digital Signal-processing IC for CD-ROM Systems
CXD3030R
A CD-ROM playback speed of 48脳 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脳
Provides even higher mounting
densities by including on-chip
RAM.
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脳.
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脳. 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脳.
When I joined Sony, 2脳 speed
drives had just been released.
It鈥檚 impressive how far we鈥檝e
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.
SONY
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