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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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