SECTION 1
INTRODUCTION
1-1.
PURPOSE
This specification provides the information necessary
to
interface the OA-D30V Micro Floppydisk drive
to
floppy disk controllers, and provides
the
technical
specifications for reference
in
OEM contracts.
1-2. GENERAL
DESCRIPTION
The
SONY Micro Floppydisk drive represents a
technological break through offering extreme
com-
pactness, just 4.0" wide by 2.0" high by 5.1" deep,
and lightweight, just 1.5 Ibs., providing a versatile
data
storage
component
for the OEM Systems de-
signer.
SONY·s leadership
in
high-density recording tech-
niques, perfected
in
video technology, enabled SONY
engineers
to
develop the Micro Floppydisk, a new
standard, just
3.5".
Yet
an unformatted, single side,
double density capacity
of
437.5 K bytes
in
135
tracks per inch provides nearly double the capacity
of
conventional 5.25" disks.
This disk
is
unlike any' you have handled before-
it's floppy,
but
not
too
floppy. A rigid protective
shell provides protection unique
to
the
Micro Floppy-
disk. Plus a sliding disk guard
to
keep
out
dust, dirt,
fingerprint and
other
foreign objects
that
might
degrade performance plus a metal centering hub,
allowing positioning
to
be accomplished with greater
ease and more positive accuracy and over
30,000
interchanges with each diskette.
Driven by a
SONY developed direct drive
motor
at
a speed
of
600
RPM,
providing
better
signal
to
noise ratio while transferring data
at
a fast rate
of
500
K bits per second
in
double density mode, twice
as fast as conventional
5.25" drives.
As
drive
motor
is
a brush
less
motor,
it
reduces mechanical and
electrical noise and guarantees
10,000
Motor On
Hour.
-1-
The
SONY proprietary read/write and tunnel erase
head developed using video techniques
is
positioned
by a precision stepper
motor
assembly, providing
fast access while maintaining positioning accuracy.
And high coercivity media provides high data iner-
grity.
The
OA-D30V Micro Floppydisk drive
is
interface
compatible with conventional
8"
floppy disk drives.
Accordingly conventional FDC chips such
as
Western
Digital FD1791,
NEC
~PD765
can be used.
Whether your application
is
small business systems,
word processing, personal computers
or
any related,
you will find the Micro Floppydisk drive offers a
whole new range
of
possibilities.
The Micro Floppydisk drive offers the following
features.
*
3.5"floppy
disk media with disk guard
* Large capacity
..........
437.5 K bytes
* High track density
...........
135
TPI
* Long life brushless direct drive
motor
* High transfer rate
......
500Kbps
(MFM)
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