NEC FDI036A Technical specifications

FDI036A
3.5- FLOPPY DISK DRIVE
PRODUCT DESCRIPTION
806-520236-0
REV. ~O
NEC Corporation
PreJ I mIn a.. ,j

PROPRIETARY NOTICE
The information and design disclosed herein were originated
by and are'the property of NEe Corporation. NEC reserves
all patent, proprietary design, manufacturing, reproduction
use, and sales rights thereto, and to any article disclosed
therein, except to the extent rights are expressly granted
to others. The foregoing does not apply to vendor
proprietary parts.
Specifications remain.subject to change to allow the
introduction of design improvements.
Copyright 1985 ~
NEC Corporation
Printed in Japan
- i -

Edition
Description
1
Prepared
in August 1985
- ii -

CONTENTS
PROPRIENTARY NOTICE
CONTENTS .............................. ..............i
iii
1. GENERAL
................................... 1
2.
GENERAL SPECIFICATION ...............................2
Drive Specifications .•••••••••
2.1
2.2
Drive Structure
...
.............................2
5
2.3
2.4
Drive Opera~ion
Disk Specifications
...........................
..............7
8
2.5 Disk Structure
... ~~ ~ ~ .9
3.
INTERFACE
..........'.
11
Physical Specifications
3.1
3.2
General Description
...........................
.......................
11
13
3.2.1
3~2.2
Signal Types and Pin Configuration
Power Connector and Pin Configuration
......
15
16
Electrical Specifications
3.2.3
3.3
3.3.1
3.3.2
Connector Type
Signal Level
Driver/Receiver
.............................
.....................
............................
............................
17
18
18
18
3.4
Input Signals
.................................
20
3.4.1
DRIVE SELECT a to 3 (DSO to 3)
iii
20

WRITE PROTECT (PRT)
DRIVE SELECT and Output Signal Timing
Interface Signal Timing
Write Timing •••••••••••.••••••••• ~.
24
24
28
21
28
22
24
23
30
25
25
26
20
21
22
30
27
27
27
29
29
29
..
.................
..................
......................
.........................
..........................
..........
i.
........ :- .
I
...........................
............................
............................
... ~ .
..............................
................................
.................................
..................................
WRITE DATA (WDT)
MOTOR ON (MON)
Access Timing
Autochucking Timing
Write Data Timing
INDEX (IDX)
READ DATA (RDT)
TRACK 00 (TKO)
READY (RDY)
WRITE GATE (WGT)
SIDE SELECT (SSL)
Step and Track 00
Input Power Specifications
STEP (STP)
Read Timing
DIRECTION SELECT (DIR)
Ou tpu t Signals
Po we r In te rface
3.4.2
3.4.3
3.4.4
3.4.5
3.4.6
3.4.7
3.5
3.5.1
3.5.2
3.5.3
3.5.4
3.5.5
3.6
3.6.1
3.6.2
3.6.3
3.6.4
3.6.5
3.6.6
3.6.7
3.7
3.7.1
4.
OPERATING PROCEDURES
.................................
31
4.1
Setting a Floppy Disk
.......................
31
4.2
Removing the Floppy Disk
31
iv

4.3
Display Lamp ..................................
31
5. EXTERNAL SHAPE AND INSTALLATION ••••••••••••••••••••• 32
5.1 External Shape and Fitting Hole Positions •••.. 32
5.2 Installation •.•••.•••.•••••••.•••••••••••••••. 33
5.3 Recommended Air Flow •••••••••••••.•••••••••••. 34
6. PACKING AND TRANSPORTATION
- v -
35

1. GENERAL
The FDl036 micro-floppy disk drive is a
double-sided micro-floppy disk drive with 135
tracks per inch (TPI).
The Micro-floppy disk (abbreviated as disk in this
manual) used for the FDI036 is contained in a hard
jacket with auto shutter.
The FDl036 micro-floppy disk drive has a total
volume one fourth that of conventional 5-l/4
w
minifloppy disk drives and weights only
approximately 560 g, yet has a comparable storage
capacity.
The previous FD 1035 series is the short model with
short depth (130 mm). The FD 1036 series is the
slim model with thin thickness (30 mm).
The drive uses a direct-driven spindle with a
brushless DC motor, and by due the low power design
it consumes only 2.1 watts of power (Typ).
The low noise design assures silent operations.
In this manual the FDI036 micro-floppy disk drive
is abbreviated as FDD.
-1-

2. • GENERAL SPECIFICATIONS
2.1 Drive specifications
.-
NO. Item Specification
Unit
--
1
Recording mode MFM
FM
2
Capacity
Unformatted
1
0.5
-
MB
Forma ted
(NOTE 1)
640
320
kB
3
Data
transfer rate 250 125 k-bit/sec.
4
Maxim\D1 bit density 8717
4359
BPI
5 Tracks 160
~
6
Average rotational speed
300
rpm
",
7
Seek time
.3
ms
(Track-to-track)
8 Seek settling time
15
.,
ms
9
Track density
135
L
TPI
10
Start time
(NOTE 2)
800
ms
\
11
Standard
Width
30
(1.2)
mm
(in)
external
dimen- Height
101.6
(4)
mm (in)
sions
(NOTE 3)
Depth
146 MAX
(5.75)
mm (in)
12
Weight
56
gr
13
Operating
Temperat ure
5 '"
45
°C
environ-
ment
Relative
20 '" 80
iRH
condi-
h\D1idity
tions
Max im 1.DIl
29.0
°C
wet-bulb
(woncondensing)
temperat ure
"-2-

No •.
Item
Specification Unit
14 Power ·Vo1tage
(V)
Start up current
Steady-state
supply
(NOTE 4)
current (NOTE
5)
require-
ment +12
Less
than 0.1
90 rnA
+5 60 200
rnA
15 Power
dissipation
0.3
2.1 W
.".
16
Heat output
0.26
1.8
kcal/h
17
Reli- MTBF
(NOTE 6) 12000 (Under
standard
poa
ability
condition)
-
~e
MTTR
0.5
h
Device life
15000 poa or 5 years
(De sign life)
-9
Times/bit
Soft errors
10
(Not including 2
or less retry attempts)
-l.Z
Hard
errors
10
Times/bit
.
_6
Seek error
10
..
Times/seek
ratio
..
6
18
Disk
life
3.0 x10
Pass
,"
count/
track
.
19
Disk
Double sided 3.5"
diskette specified
by NEC
20 Drive Operating
Non-operating
Transporting
Unit
environment (Storage) (Packing)
Temperature
4 tV 46
-20
'" 50
-40 '" 60 '
°C
(39 "'115) (-4 "'122) (-40 "'140) (OF)
Relative
20 '" 80 10 '" 90 5'" 95
%RH
hunidity
M.ax im lU'It
29
40
45.
°C
wet-bulb
(84) (104) (113) (OF)
temPe rat ure
Largest 20 30
30
°C/h
temperat ure
(59) (86)
(86)
(OF/h)
-3-

No .
Item
Specification
Unit
Allowable
0.5
22G
vibration
(Less than
(Less than
(Less than
(Except at
100 Hz)
100 Hz) 100 Hz)
resonance
point)
(NOTE 7)
Allowable
5
15
40
G
shock
(Less than -
10 ms)
NOTEl: 16 sectors/track, 256 bytes/sector time
2: Time until READY after MOTOR ON
3: Dimensions not~nc1uding that of the front
bezel.
4: If the disk is not inse rted 0r the MOTOR
ON signal is invalid.
5: When FDD is in READY status.
,I
6: Under standard use conditions
(1) Drive service
time (POH)
(2) Actual head load
time (R/W time)
(3) Disk insertion/
ejection
(4) Motor ON/OFF
(5) Average use time
per disk
8 h,Lday
0.5 h/day
25 times/day
300 times/day
2 h/day
(4 disks/day.drive)
7: Excitation in three directions one R/W test
by our FDD tester for 0 to 79 track
8: Between SG and FG: 90Kn (DC)
-4-

2.2 DRIVE STRUCTURE
The major component of FDD have the following
functions:
(1) Base
Constructs the frame.
(2) Spindle motor assembly
Rotate the ~ directly by using the DC
spindle motor. The disk is set to the
spindle with a magnet and is driven by a
driving pin.
(3) Head carriage assembly
Contains a pair of magnetic heads facing
across the disk. The R/W gap of the head on
side one is dislocated 8 tracks inner than
that of the head on side zero.
(4) Step motor
Move the carriage Assy by using the steel belt
for head position.
-5-

(5) Index sensor
Detect the drive position of the spindle motor.
(6) Track 00 sensor
Detect whether the magnetic head is in the 00
track.
(7) Write protect sensor
Detect the open/close of the write prohibition
hole.
(8) Eject mechanism
Used fo~ manual insertion and removal of a disk
and for automatic shutter control.
(9) P.W.B.
Mounts the electric circuits that controls
positioning of magnetic head, read/write
operations, etc.
(10) Display lamp
This is a lamp that displays a FDD status.
(11) Front panel
Dress panel installed on the Drive front.
-6-

203DRIVE OPERATION
When a
diskette is inserted into the FDD, the.
spindle motor rotates automatically untill the
chucking of the disk is finished. Then the FDD
becomes a standby status. After the MOTOR ON
sign~l is.true, the. FDD_becomes ready ~hen the:
spindle motor reaches the specified rotation speed.
When the drive is selected, it transfers
the READY signal to the controller.
The magnetic head moves to a target track
according to the STEP pluse and DIRECTION
SELECT
signals.
The desired magnetic head is selected by the SIDE
SELECT signal from the controller. Now FDD is
ready for read/write operations.
For a write operation, the WRITE DATA signal which
is the serial data sent from the controller
converted into magnetized pattern and is recorded
on the disk.
For a read operation, the magnet~zed pattern
recorded on the disk is detected by the head and is
converted into serial data, and is sent to the
controller as a READ DATA signal.

2.4 DISK SPECIFICATIONS
No. Item
Specification
1Media
type
3.5- double sided
mediun
specified
by NEC
2
Prod uct name
NEC micro
floppy'_disk
3Number
of
disks
1
4
Recording
surfaces
2
5Number
of total tracks
160
per disk
6
Disk cartridge
size
90 x94
mm
7
Operating
Temperat ure
10 '" 60°C
(50 '" 140°F)
environment
-
conditions
Relative
8tV
80% RH
hunidity
~.
Wet-bulb
29°C MaximlDll (84°F)
temperature
~
'1
Temperat ure
20 o C/h MaximlDll
(36°F/h)
gradient
-
External 4000 A/m (50 \<
or less oersted)
Magnetic field
Note
Leave the disk
at least 30
minutes in the drive operating
environment before
use.
-8-

2.5 DISK STRUCTURE
The floppy disk is contained in a hard jacket
withinside of which liner sheets are provided for
disk surface protection. The disk uses a
polyethylene terephthalate base coated with
magnetic layers. The liner consists of unwoven
cloth and protects the disk surfaces from scratch
or dust. The hard jacket is made of ABS resin.
The disk has a metal hub wihch is used to secure
itself to th~ spindle. The hard jacket has a
write-protect hole and automatic' shutter.
The-disk construction is shown in Figure 2.1.
-9-

Figure 2.1 shows the disk structure.
o
I
I.
90
.I
Fig. 2.1 Disk Structure
-10-

3. INTERFACE
3.l GENERAL DESCRIPTION
FDDIs may be connected to its controller in either
parallel or daisy-chain configuration. The number
of FDD Is which can be connected to one ·controller
depends on dividual system and controller. For
daisy-chain connection, each controller can control
up to 4 FDDIs.
Signal line termination resistors are provided on
each FDD. The basic FDD connection to the
controller is shown in Figure 3.i.
(a) Parallel connection
Signal cable
u
.1
RRRR
FDD
FDD
FDD' FDD
Controller
#0
il
#2
#3
I
Power cable
R:
Terminating
resistor: 2K 0
Signal cable maximum length 1 m
-11-

(b) Daisy Chain connection
Signal cable
.""
\/
\/
\/
\
.0
RRRR
-
FDD FDD FDD FDD
Controller
#0
#1
#2 #3
II
...
Power
cable
-
R:
Terminating
resistor 2K n
Signal cable total length maximum length 1 m
Fig. 3.1 Basic Connection Modes ~
-12-

3.2 PHYSICAL SPECIFICATIONS
The FDD is connected to its controller through a
signal connector and a power connector. A faston
terminal is provided for frame ground. The
connector locations are shown in Figure 3.2.
-13-

Signal connector
lu
Si qnal connector
receptacle
Power connector
plug
Fig. 3.2 Connector Locations
-14-