SA41
0/460
96TPI
Single/Double-sided
uuu
Minifloppy™
Storage
Diskette
3
Drives
i—
^Shugart
©SHUGART
RIGHTS
ALL
1981
RESERVED
TABLE
.0 Introduction 1
1
1 .
General Description 1
Specification Summary 1
1.2
1.2.1 Performance Specifications 1
1.2.2 Functional Specifications 2
1.2.3 Physical Specifications 2
1.2.4 Reliability Specifications 2
2.0 Functional Characteristics 3
2.1 Electronics 3
2.2 Drive Mechanism 3
2.3 Positioning Mechanism 3
2.4 Read/Write
2.5 Recording Formats 3
3.0 Functional Operations 4
3. 1 Power Sequencing 4
3.2 Drive Selection 4
3.3
Motor
Track Accessing 4
3.4
3.4.
1
3.4.2 Step In 5
3.5 Side Selection
3.6
Read
3.7 Write Operation 8
3.8 Sequence of Events 8
4.0 Electrical Interface
4. 1 Signal
4.1.1 InputLines 11
4.1.2 Output
4.
2 Power
4.2.1 Frame Ground
5.0 Physical Interface
5.1 Jl/Pl Connector
5.2 J2/P2 Connector 18
5.3 Frame Grounding
6.0 Drive Physical Specifications 20
Head(s)
On
Step Out 4
(SA460 Only) 5
Operation 5
Interface 11
4.1.1.1 Input Line Terminations 12
4.1.1.2 Drive Select
4.1.1.3
4.1.1.4 Direction Select 13
4.1.1.5 Step
4.1.1.6 Write Gate 13
4.1.1.7 Write Data 13
4.1.1.8
4.1.1.9 In
4.1.2.1 Track
4.1.2.2 Index/Sector
4.1.2.3 Read Data
4.1.2.4 Write
4.1.2.5 Drive Status
Interface 16
MotorOn
Side Select
Use
Lines
1-4
(SA460 Only) 14
(Option) 14
00 14
Protect 15
OF CONTENTS
10
12
12
13
14
14
14
15
16
17
17
18
6 1 Mechanical Dimensions 20
6.2
Mounting
20
3
4
TABLE OF CONTENTS (CONT)
7.0 Recording Format
7. 1 General
7.2 Byte
7.3 Formats
7.3.1 Soft Sectored Recording
7.3.1.1 Track Layout
7.3.1.2
8.0 Customer
8.1 Drive Select
8.2 The Door Lock Solenoid
8.3 Side Select
8.4 Drive Status 30
8.5 Write Protect
9.0 Operation Procedures 32
9.1
9.2 Minidiskette
10.0 Installation of Packaging Materials
Installable Options
Minidiskette Loading 32
Hard
Sectored
Handling 32
Format
Recording Format 23
fOption) 28
21
21
21
22
22
23
25
27
29
31
33
LIST OF
ILLUSTRATIONS
Figure 1. SA410/460
2. SA410/460
Track Access
3.
4. Read
5.
6. FM
7. Write
8. Write Data
9.
10. Interface Connections
11.
12. Step
13. Write
14. Index
15. Index/Sector Timing (SA115
16. Index/Sector
17.
18.
19. Jl
20.
21.
22. Recommended Mounting
23. Byte (FM
24. Data Bytes
25.
26.
27.
28. Component Locations
29. Drive Select, Motor On and In Use
30. Door Lock From In Use or
31. Side Select, Using
32. Drive Status
33. Write Protect
34. Carriage Stop 33
35. Door
36. Drive
37.
Initiate Timing
Read Data
and MFM Code
Initiate Timing 7
General Control and Data
Interface
Signal Driver/Receiver 12
Timing 13
Data Timing (FM
Timing (Soft Sectored Media) 15
Read Data Timing (FM) 15
Interface
J2
Physical Dimensions
Connectors-Physical Locations 17
Connector
Connector
Encoding)
Recommended Soft Sector
MFM Recommended Format
Recommended Hard Sector FM and MFM Formats
Retainer 34
Container 35
Shipping Container 36
TPI Minifloppys
96
Functional Diagram
Timing 5
Timing (FM)
Comparisons 7
Timing (FM)
Timing Requirements
Encoding) 14
or
SA167
Timing (SA117 or SA167
Media)
Media)
Dimensions 18
Single Density (FM) (Even Boundaries) 22
-
256 Bytes/ 16 Records Per Track (IBM Type) 22
Drive Select 28
Direction Select . . . 29
iv
v
6
6
8
9
10
15
15
18
19
20
21
21
24
26
27
30
31
in
FIGURE
1. SA410/460 96 TPI
IV
MINIFLOPPYS
WRITF
READ DATA
READ
LOGIC
PROTECT
ASSM
-*
DRIVE
SELECT
SIDE
SELECT
WRITE
DATA
WRITE
LOGIC
*
WRITE
GATE
STEPPER
ACTUATOR
*SIDE
SELECT
i
WRITE
PROTECT
—
«
i
u
R/W
HEAD
ASSM.
,
R/WO
DRIVE
R/W1
/•
\
SELECT
o
DOOR
CLOSE
SWITCH
CONTROL
LOGIC
/
/
/
/
STEP
v
/
DIRECTION
SELECT
TRACK
00
-
SENSOR
INDEX/
SECTOR
DETECTOR
DRIVE
SELECT
MOTOR ON
IN
USE
*-
/
/
DOOR
LOCK
_,
/
»•
IN USE
LED
TRACKOO
/
s
.
«#
hNDEX/SECTOR
*
\r
f
DRIVE
STATUS
(
DRIVE
\^
y
[
MOTOR JL-
i»
V^T
»-
DOOR
I OOK
*SA460 ONLY
SOLENOID
(OPTION)
FIGURE
2. SA41
0/460
FUNCTIONAL
DIAGRAM
INTRODUCTION
1.0
General
1.1
compact
The
high
cost
SA410/460
The
py.
drive,
ted
comfortably
fit
capacity.
SA410/460
and
deep,
media;
motor
assembly;
The
telligent'
capacity
flexible
Key
rapid
actuator
SA410
calculators,
random
media
Features
Track
96
Precise
0.5/1
SA400/450
Same
125/250
Single and
heat
Low
Positive
Rapid
Shugart
Write
Activity
Door
Drive
Description
SA410
performance
Minifloppy
start
with
of
DC
precise
write
weight
internal
and SA460
access
drive
disk
per inch
HeliCam™
MByte
compact
start DC
protect
Lock
Status
(unformatted)
I/O
size
Kbits/second
double
dissipation
insertion
media
drive
Bi-Compliant™
circuitry
light
Solenoid
single-sided
solution
Minifloppy
space
the
in
have
drives
pounds;
three
motor
drive
HeliCam™
protect
your
are
storage is
data
Actuator
weight
and
transfer
to
motor
read/write
storage,
capability
program
compatibility
density
and SA460
OEM
for
drives
allocated
these
low
precision
with
circuitry;
best
required.
capacity
the SA400/450
as
rate
media
avoid
(eliminates
double-sided,
data storage
are less
most
for
standard
dissipation;
heat
V-groove
activity
choices
personal
for
damage
requirements)
AC
assembly
head
applications
one-half
than
tape
features:
speed
servo
screw;
lead
and solid
light,
word
computer
SA410/460
The
-
96
cassette
compact
positive
control
ball
processing
systems and
similar
SA460
on
TPI,
which
size
the
units,
media
bearing
die
offers the
most
to
and integral
cast
Minifloppy™
require
Shugart's
of
offer up to
and
-
3.25"
just
size
insertion to
anti-backlash
chassis.
systems,
microprocessor
applications
other
most
cassette
tape
disk drives
maximum
standard SA801
megabyte
one
x
high
keep door
tachometer;
followers;
effective
cost
units
reliable, low
a
offer
capacity in
of
5.75"
wide
from
drive
direct
read/write
based systems,
where low
data storage
Minflop-
a
floppy
unformat-
8.25"
x
closing
stepping
head
higher
cost
of any
disk
on
'in-
Specification
1.2
Performance
1.2.1
Capacity
Summary
Specifications
Unformatted
Disk
Per
Surface
Per
Track
Per
Formatted
Sector/Track)
(10
Disk
Per
Surface
Per
Track
Per
Transfer
Latency
Access
Rate
(avg.)
Time
Track to
Side to
(w/o
Track
Side
settling)
Average
SA410
Single/Double
250/500
250/500
3.1/6.2
204.8/409.6
204.8/409.6
2.56/5.12
125/250
Kbits/sec
msec
100
6 msec
158 msec
Density
KBytes
KBytes
KBytes
KBytes
KBytes
KBytes
SA460
Single/Double
MByte
0.5/1
250/500
3.1/6.2
409.6/819.2
204.8/409.6
2.56/5.12
125/250
KBytes
Kbits/sec
100 msec
msec
6
0.2 msec
msec
158
Density
KBytes
KBytes
KBytes
KBytes
Settling Time
Motor Start Time
SA410
15 msec
200
msec
SA460
15 msec
msec
200
1.2.2 Functional
Rotational
Recording
(inside track)
Flux
Track Density
Tracks
Index
Encoding
Speed
Density
Density
Method
Media Requirements
soft sectored
16
sectors hard
10 sectors hard
Industry
Oxide
5.25 in.
1.2.3 Physical
Environmental
standard
on 0.003 in.
(133.4mm) square jacket
sectored
sectored
flexible diskette
Specifications
Limits
Ambient Temperature
Relative
Maximum
Humidity
Wet Bulb
Specifications
(0.08mm) Mylar
=
40°F
to 115°F
=
=
-8°Fto 117°F
300 rpm
2788/5576
fci
5576
96tpi
80
1
FM/MFM
SA114
SA115
SA117
Operating
(4.4°C to
20% to 80%
78°F
(25.6°C)
Storage
(-22°C
1%
to 95%
no
condensation
bpi
46.1°C)
to 47°C)
300 rpm
2961/5922
5922 fci
96tpi
80
1
FM/MFM
SA164
SA165
SA167
-40°
to 144°F (-40°C
no condensation
bpi
Shipping
to 62°C)
1% to 95%
DC Voltage
+ 12V ± 5%
+ 5V
Mechanical Dimensions
Width
Height
Depth
Weight
Power
18.2 watts
14.6 watts
1.2.4 Reliability
MTBF:
'Assumes
PM:
MTTR:
Requirements
5%
±
=
5.75 in.
=
3.25 in.
=
8.25 in.
=
3 lbs. 3 ozs.
Dissipation
(62.1
(49.8
8000 POH
the duty
Not required
30 minutes
1.3A typical,
@
0.5A typical,
@
(146.1mm)
(205mm)
=
BTU/Hr)
BTU/Hr)
Specifications
Component Life:
Error
Rates:
Soft
Read Errors:
Hard
Read Errors:
Seek
Errors:
2.2A MAX
0.7A MAX
(exclusive of
front panel)
(82.6mm)
Kg) Nominal)
(1.44
Continuous
(typical)
Standby (typical)
under typical
cycle of the drive spindle
5 years
per
9
1012
6
1 per 10
1
1 per 10
usage
bits
bits
seeks
*
read
read
motor to be
Media Life:
Passes
Insertions:
25%
per Track: 3.0
30,000 +
6
x
10
FUNCTIONAL
2.0
CHARACTERISTICS
SA410/460
The
Read/Write
1.
Drive
2.
Precision
3.
Read/
4.
Electronics
2.1
electronics
The
Index
1.
2.
3.
4.
5.
6.
Head
The
loaded
Drive
2.2
DC
The
through
interchange.
data
media
Mechanism
Track
Write
Detector
Position
Head
Read/Write
Protect
Write
Select
Drive
Positioning
the
onto
Motor
Spindle
Mechanism
motor
drive
belt-drive
a
damage.
Minifloppy
Control
and
Positioning
Head(s)
packaged
are
Circuits
Actuator
Amplifier and
Circuits
Control
Actuator
diskette
under
system.
mechanical
A
when
An
drives
disk
Electronics
Mechanism
one
on
Driver
Transition
moves
the door
servo
expandable
interlock
PCB
the
speed
consist
which
Detector
read/
closed.
is
control
collet/
prevents
of:
contains:
write
(using an
spindle
door
head{s) to
integral
assembly
closure
desired
the
tachometer)
provides
without
track on the
precision
proper
diskette.
rotates
the
media positioning
insertion,
media
head(s)
The
spindle at 300
to
eliminating
thus
are
rpm
ensure
Positioning
2.3
read/
The
with a
screw
lead
the
Read/Write
2.4
The glass
data
ween
ratio and
noise
read/write
The
plane
a
in
assures
diskette.
of
face
Recording
2.5
format
The
users
the
detailed
For a
head
write
follower
ball
screw is
rotated in
bonded
tracks.
diskette
head(s)
perpendicular
perfect
The
the
compliance
head
diskette
Formats
of the
application to
discussion
Mechanism
assembly
which
discrete
Head(s)
ceramic
Thus
data
and
normal
interchangeability
mounted
are
the
to
surfaces
minimum
with
recorded
take
of
accurately
is
attached to
is
ferrite
interchange
read/
the
with
been
have
the
on
maximum
various
the
positioned
the
increments by
write
read/
tolerances
insured.
is
carriage
on a
head(s)
write
read/write
designed
head/diskette
diskette
is
advantage of
recording formats
through
carriage
head
stepping
a
head(s)
contain
between
which is
platen
by a
head(s). The
obtain
to
wear.
totally a
the
the use
assembly.
motor.
tunnel erase
media and
located on
located
read/write head(s)
maximum
function
total
refer to
of the
available
Section
of a
Precise
precision
on the
transfer to
signal
host
bits
7.0.
precision
track
elements to
will not
drives
carriage ways.
casting.
base
is
system,
that can be
HeliCam
location
provide
This
in direct
and
can be
and
written
is
erased
degrade
The
precise
the magnetic
from
on any
V-groove
accomplished
areas
signal to
the
diskette
contact
designed
is held
registration
with the
around
track.
one
lead
as
bet-
sur-
3.0 FUNCTIONAL
OPERATIONS
3.1 Power
Applying
GATE line
troduced
respect
heads
(Recalibrate)
3.2 Drive
Drive
Sequencing
DC
power
must be held
before any
to the data
after power
Selection
selection
occurs when
pond to input lines
output lines
3.3
Motor
In
order
by
activating
to come
The
motor must
drive
has
ecution
figuration
3.4 Track
and lights
On
for the
of a
host system
the line MOTOR
up to
speed before
not received
command. This will
are turned
Accessing
to the SA410
inactive
operation is
tracks on the media
on, a
or
Step
a drive's
gate output
the Activity LED
to read
ON. A
reading
be turned
off by the
a new command
on with MOTOR
or SA460 can
or at a high
performed.
is
indeterminant.
Out
operation should
DRIVE SELECT
lines.
Under normal
on
the front of
or write
data the DC drive
200 ms delay
or writing
host
system
within
insure
maximum
ON.
be
done in any
level. After
Also, after
must
can
be accomplished.
by deactivating
two
(2)
motor and
Reference
sequence;
application
powering
In
order
be
performed
line is activated.
operation, the DRIVE
the drive.
motor
be introduced
seconds
of DC
initial
on,
to assure
Only
must be turned
after
the MOTOR
(10 revolutions
media life.
sections
4.1.1.2
and 4.1.1.3.
however,
power, a
position of
proper
until
the Track
the drive
SELECT
activating
ON line. This
of diskette)
Note: All
during
power up,
100 ms
the
read/write
positioning
00 line
with this line
line
enables
on. This
this line
after
motors in a
delay
of
becomes
may
be
to allow
should
completing
daisy chain
the WRITE
should
the read/write
active
the input and
heads
will
be in-
with
active
res-
accomplished
the
motor
be done if
the
the ex-
con-
Seeking
a.
Activating
b.
Selecting desired
c. WRITE
d. Pulsing
Multiple
reached.
read/
the
DRIVE
GATE
the STEP line.
track accessing
Each pulse
on the DIRECTION
3.4.1
Step
Out
With
the DIRECTION
read/write
have
heads
the timing
to move
characteristics
write heads
SELECT
direction
being inactive.
on
SELECT
utilizing
is
accomplished
STEP
the
line. Head
SELECT
one
from
one track
line.
DIRECTION
line will cause
line
at a plus
track away
shown
in Figure
another
to
by repeated
the read/write
movement
logic level
from
the center
3.
is
SELECT
pulsing of
is initiated
(2.5V to
of
accomplished
line.
the STEP
heads to
on
the trailing
5.25V) a
the disk. The
by:
line
move
one track either
edge
pulse
pulse
until
the desired track
in
of the STEP
on the STEP line
(s) applied
to the STEP
or out
pulse.
will
has
been
depending
cause the
line must
DRIVE
SELECT
-s*-
REVERSE
DIRECTION
3.4.2 Step
With the
read/write
have the
3.5 Side
Selection
Head
SELECT line
write head.
read/
1.1
state
msec
changes
of
SELECT
500 ns
STEP
In
DIRECTION
heads to
timing
characteristics
Selection
controlled
is
selects
When
before a
after write
MIN.
VsMIN.
SELECT
move one
(SA460
read/write
the
switching from
or write
read
gate
line at
track
shown
only)
via the
head on
operation
terminated.
is
FIGURE
minus logic
closer to
Figure
in
signal line
I/O
one
Figure 4
FORWARD
1
MIN.
s
H
M
rLTLT
3. TRACK
the
3.
the side
side to
can be
center of
ACCESS
(0V
level
the
designated
surface
the other.
initiated.
the use
shows
^
21 MS
\^ tt
r*W~
•6
MS
to
disk. The pulse (s)
of the
Side
5-
5.5 MS
MIN.
MIN.
TIMING
.4V), a
SELECT.
SIDE
diskette. A
A 200/xs
select
of SIDE
MIN
pulse on
delay is
should not
h-
applied to
A plus
minus
SELECT
Vs
Vs
STEP line
the
logic level on
logic
required
change
prior to a
MIN.
MIN.
•Vs
will cause
the STEP
level selects the
after SIDE
state for a
read
line must
the
SELECT
minimum
operation.
MIN.
the
SIDE
side 1
3.6 Read
Reading
a.
b.
c.
data from
Activating
Selecting
WRITE GATE
The timing
required in
timing
The
Operation
the
DRIVE
(SA460 only).
Head
being
relationships
order to
Read Data
of
SA410/460
SELECT
guarantee that
line.
inactive.
required to
(FM) is
minifloppy
initiate a read
read/write heads
the
shown
in
drive is
sequence
Figure 5.
accomplished by:
shown in
are
position
has stabilized
Figure 4.
These timing
prior to
reading.
specifications
are
DC POWER
MOTOR
DRIVE
WRITE
ON
SELECT
STEP
GATE
~ff-
-200
MS
MIN.
I
I
-r*-
-*f-
-*f-
1.1
200^s
MIN
~U
MS
-
MIN.
SIDE SELECT
(SA460
VALID READ
READ
ONLY)
DATA
DATA-
A =
LEADING EDGE
B = LEADING
-200
FIGURE
EDGE
FIGURE
1_
i
2^s MAX.
MS
MAX.
4. READ INITIATE
OF BIT
MAY
OF BIT
MAY BE
5. READ DATA
BE ±
i
21 MS MIN.
juuuuir^
TIMING
800
± 400
4.0/iS
NOM.
LTU
ns FROM
FROM
ns
TIMING (FM)
ITS
ITS
4.0/tS
NOM.
U
NOMINAL
NOMINAL
1.1
MSEC
MIN.
POSITION
POSITION
-Tf-
ITU
BIT
CELLS
1
1
1
1
1
CDCDCDC
fm
n_ji_n__n_rLJT_ri
4.00
L
*-
MS
P
BIT
CELLS
mfm
MOTOR
DRIVE
1 1
JDDD
i
p
ON
SELECT
1
n n n
FIGURE
1
D CC
n_n n_/
FM AND MFM CODE
6.
CDC
n_ri_rL
1
D
/
C
n n
8.00
/
/
/
/
/
/
COMPARISONS
/
C
CD
n_n__
*•
^s
—
/
/
/
/
/
/
/
/
STEP
GATE
WRITE
DATA
WRITE
SIDE SELECT.
NS
500
MIN
FIGURE 7. WRITE
MAX
8.00^s
uu~u"irLi
iy
INITIATE
TIMING
h
8.00^s MAX.
MS
1.1
MIN.
The
encoding
start of every bit
the following prerequisites:
The
clock bit is omitted
bit.
See Figure 6.
In
the above mentioned
bits
at
the centers of their bit cells.
scheme of the recorded
cell (Refer
from
encoding
data can
to Figure
the current bit cell if either
MFM
6)
.
be either FM
encoding
schemes, clock bits
or
MFM. FM
rules
allow clock bits
the preceding
are written
encoding
to be omitted
bit
cell or the current
at the start of
their
rules
specify a
from
bit cell
respective
clock bit
some bit
bits cells and
cells, with
contains
at
the
a data
data
3.7 Write
Writing data
a. Activating the DRIVE
b. Selecting
c. Activating
Pulsing
d.
Operation
to the SA410/460 is
SELECT line.
Head (SA460
the WRITE GATE
the WRITE DATA line with
only).
line.
The timing relationships required
are required in
tions
select, or side select (SA460), may
write gate is returned
The
timing
specifications
Write
data encoding can be FM or MFM. The
the effects of bit shift. The
pattern it forms with nearby
3.8 Sequence
The timing diagram
for proper
operation.
order
to an
for the Write Data
Events
of
shown in Figure
guarantee
to
inactive
direction of
bits.
accomplished
the data
to initiate a Write
that the read/write
not change
state (refer to paragraph 4.1.1.7).
by:
to be written.
Data sequence
nor a step command
pulses are
write data should
shown in
head's
be precompensated
compensation required for
shows the necessary
9
sequence
are shown
position has
in Figure
be issued
Figure 8.
any given bit in
of events
7. These
stabilized
for a
100 ns
the data stream
with associated
prior
minimum of 1.1
on all tracks
timing
to writing.
msec after
to counter
depends
timing
restrictions
specifica-
Drive
on the
WRITE
DATA
LJ
200 ns MIN
'2100
ns MAX.
FIGURE
8.00/tS
8. WRITE DATA
U* 4.00/iS
TIMING (FM)
POWER
ON
*$-
MOTOR
DRIVE
VALID
WRT.
AND
OUTPUT
VALID
SECTOR
DIRECTION
SELECT
STEP
WRITE
ON
SELECT
TRK. 00
PROT.
INDEX/
OUTPUT
GATE
500
MIN.
•
200 MS
MIN.
-if-
*£
MAX.
500 ns
200 MS.
MAX
-500
ns
6 MS
^
MIN.
MAX.
ns
•VsMIN.
MIN.
-Vs
»>
5.5 MS
MIN.
MS
21
MIN
*
Vs
*
1.1 MS MIN. —*A
$t
M
19
•
MIN-
21 MS
MIN.
1f~
u
L
\
11
MIN.
MS
DATA
WRITE
VALID
READ
DATA
SIDE
SELECT
(SA460ONLY)
200 MS MAX
FIGURE 9. GENERAL
MIN.
500 ns
200 MS MIN
200
s
M
21 MS
MIN.
MAX
2/iS
•
MIN.
200/xS
CONTROL
MIN.
-
•
'
AND
ITU
DATA
W
MAX
-8^s
9
innr*
^
LTLT
-*f
TIMING REQUIREMENTS
1.1
1.1
MIN.
MS
MS MIN.
4.0 ELECTRICAL
interface of the SA410/460 minidiskette drives can be divided
The
1. Signal
2. Power
INTERFACE
The following sections provide the electrical definition for each line.
into two categories:
Refer
to
Refer to
TWISTED
PAIR
figure 10 for all
interface
connections.
section 8.0 for description of options.
HOST SYSTEM
DOOR LOCK
IN
USE ^
SELECT
DRIVE
INDEX/SECTOR
^,
DRIVE SELECT
DRIVE
SELECT 2
SELECT 3
DRIVE
MOTOR ON
DIRECTION
STEP
FLAT
OR
PAIR
RIBBON
TWISTED
(
|
_
^
^
_
^
DATA
WRITE
GATE
WRITE
TRACK 00
PROTECT
WRITE
DATA
READ
SIDE SELECT (SA460
DRIVE STATUS
+ 5VDC
+
1 2VDC _
(OPTION)
4
1
SELECT
ONLY)
_
^*
w
w
DRIVE
J1
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
J2
4
1
i3
I
i
i
i
i
i
'19
>21
'
>25
i
i
I
i
1 3
>
1
5
7
9
11
13
15
17
23
27
29
31
33
2
rJr,
////LOGIC
GND
AC
GND
FIGURE 10. INTERFACE
10
CONNECTIONS
1?
//
FRAME
GROUND
—
—
LOGIC
"
GND
4.1
The
1.
Signal
signal
Control
Interface
interface
consists
of
two
categories:
2. Data
All lines in
to
Transfer
the host
4.1.1 Input
the
input
input
DRIVE
DRIVE
signals
multiplexing
SELECT
The input
form
The
DIRECTION
1.
STEP
2.
WRITE
3.
4. WRITE
SIDE
5.
The
1.
2.
signal
the
(output),
Lines
are of 3
signals to
SELECT
DATA
GATE
(SA460
signals
SELECT 1
SELECT 2
which
interface
interface
via
types,
and those
multiplexed
be
are
digital
are
connector
those
signals
only)
intended to
in nature and
intended to
which
are:
do
Pl/Jl.
are not
multiplexing
the
provide signals to
either
multiplexed
be
multiplexed and
are:
multiple drive
in a
affect all the
the
drive
system,
drives
(input), or
those
daisy chain
in a
provide
which
signals
will per-
system.
3. DRIVE
DRIVE
4.
signals
The
input
The
=
True
False
Input
Logical
=
Logical one
impedance
SELECT 3
SELECT
are not
which
lines have
zero
=
220/330ohms
4
multiplexed are
following
the
=
0.0V to
Vin
=
Vin + 2.5V to
electrical
+ .04V
5.25V
+
USE and
IN
specifications.
ma (max)
40
@
250^a (open)
@
MOTOR ON.
(See Figure 11
for the
recommended
circuit.)
11
MAX 10
RIBBON
TWISTED
FEET
OR
PAIR
7438
FIGURE
11. INTERFACE
4.1.1.1 Input Line Terminations
The SA410/460 has been provided with
1. MOTOR ON
2. DIRECTION SELECT
STEP
3
WRITE
4.
5. WRITE GATE
6. SIDE SELECT
7. DOOR
8. IN USE
These lines
In
a single drive
DATA
(SA460 only)
LOCK
are terminated
system
through a
this
resistor pack
220/330 ohm resistor pack
v-
I
I
I
SIGNAL
the capability
should be kept in place
of terminating
7414
DRIVER/RECEIVER
the eight input lines
installed in
to provide
a dip
the proper
socket.
terminations.
listed
below.
In
multiple
a
must have
minations
drive system only
the resistor pack removed. External
beyond the last drive and each
1/4 watt resistor.
4.1.1.2 DRIVE
The SA460
SINGLE
DRIVE SYSTEM (MX
SELECT
or SA410 is configured
With the MS shorting plug
With MX shorted,
MULTIPLE DRIVE
Four
separate input
provided
que
enable
for
4.1.1.3 MOTOR
This
drive.
deactivated,
(10
to maximize
so that
DRIVE
the outputs
a drive.
input,
when
A
0.2
revolutions
SELECT
second
for
of
system
I/O
the
SYSTEM (MX
lines (DRIVE
up to four
line active
to drive their
ON
activated
delay
maximum
the media) after
through-put
the last drive on the interface
terminations
of the eight lines
1-4
to operate
shorting plug installed)
installed, DRIVE
lines are
always enabled.
shorting plug not installed)
SELECT
drives in a
to a logical
after
motor life, if
multiplexed
will
turn its
respective
zero
activating
completion
and
motor life
no commands
with up to four drives in
SELECT when
DRIVE
,1,
motor on, allow
signal lines. A
level,
this line
of a
depending
SELECT
system
will
turn on
must be
have
previous
is
to be terminated.
may also
must be
activated
2,
may have
the drive
logic zero
the drive
allowed
been
command.
on application.
All other drives
be used, then the
terminated to + 5VDC
a
multiplexed
to a logical
DRIVE
separate
on
the
before
issued
This
to
interface
motor
to
zero level
SELECT
input pins.
respond
allowing
reading
the drives
time
may
3 and DRIVE
to multiplexed
selects a
or writing.
within
be varied
on
the interface
user must
through
multiple
drive
will turn
provide
a
220/330 ohm
system.
the motor
SELECT
Only the drive with
input
unique
reading
drive select line
or writing
This
two
seconds
by
the
line
host system
the ter-
on.
are
4)
its uni-
lines and
on the
should be
nominal
12
discussed in section 4.1.1.2,
As
tivated or if the
only when the MOTOR ON line is
4.1.1.4 Direction Select
MOTOR
ON
line is
when MS is
activated.
activated.
shorted the motor will turn on when
A user selectable
option is available where by the
the
DRIVE
SELECT line is
motor will turn
ac-
on
This interface line defines direction of motion the
circuit or logical one defines the direction as "out" and if a pulse is applied to the STEP line
will move away from the center of the disk. Conversely, if this input is shorted
direction of motion is defined as "in" and if a pulse is applied
towards the center of the disk.
4.1.1.5 Step
This interface line is a control signal which causes the
defined by the DIRECTION SELECT line. This signal must be a logical zero going pulse with a minium pulse width
of
1/ts
6 ms
The access motion is initiated on each
logical one for 5.5 ms minimum between adjacent pulses. Each subsequent pulse must be delayed
and a
minimum from the
preceeding pulse.
logical zerotological
Any change in the DIRECTION SELECT line must be made at least
the DIRECTION SELECT logic level must be maintained 1/is after trailing edge of STEP pulse. Refer
for these
DRIVE
DIRECTION
timings.
SELECT
SELECT
•
read/write
read/write
heads will take when the STEP line is
ground
to
the STEP line,
to
heads to move with the direction of motion as
or a logical zero level,
the read/write heads
pulsed. An
the read/write
will move
open
heads
the
one transition, or the trailing edge of the signal pulse.
^
before the trailing edge of
lfis
REVERSE
the
STEP
Figure
to
pulse,
12
FORWARD
-^5-
MIN.
Vs
MIN.
Vs
Hh-
MIN.
Vs
STEP
500 ns
MIN,'
by
LTLTIJ"
MIN
MS
MIN
Vs
H
FIGURE 12.
4.1.1.6 Write Gate
The active state of this signal, or logical zero,
logical one, enables the read data logic and stepper logic. Refer to Figure 7
4.1.1.7
This interface line provides the data to be written on the diskette. Each transition from a logical one level
zero level,
enabled by Write
ings.
Write
Data
will
cause the
Gate being active. Write Data must
current through the read/write heads
enables Write Data
STEP TIMING
inactive during
be
13
5.5
h
•6
MIN.
MS
be written on the
to
be reversed thereby writing
to
read operation
a
diskette. The
for timings.
.
Refer
Vs
inactive state or
a data bit. This line is
to Figure 13 for
MIN
a logical
to
tim-
WRITE DATA
4.1.1.8 Side
This signal defines which
Select (SA460 only)
head. When switching
A delay of
1.1 ms is required
4.1.1.9 In Use
Normally, the
tive. The IN
configuration.
Output Lines
4.1.2
=
Logical
=
Logical
control lines
Track
The output
True
False
4.1.2.1
activity
USE input can
LED on the
zero=Vout + 0.0V to
one=Vout + 2.5V (open
00
FIGURE 13.
side of a
from one
alternately
have the
200 ns MIN.
2100
ns MAX
WRITE DATA TIMING (FM ENCODING)
two-sided
side
to
after a
selected drive will turn on
following electrical
diskette is
the other a
write operation before
activate the LED on all the
+ 0.4V
collector
200
@
8.00^s
be written to or
to
delay is required before a
/ts
-A
changing the state of side select.
when the corresponding
drives in a
specifications.
Refer
40 ma (max)
@
250jia
max)
4.00
fis
read from. A logical one selects the side
read operation can be initiated.
DRIVE
daisy chain or separately
Figure 1
to
for the
1
SELECT signal is ac-
in
radial
a
recommended circuit.
The active
track zero (the outermost
state,
and an
zero.
or logical
when the drive's
additional step out pulse
zero state of
read/write
4.1.2.2 Index/ Sector
This interface
detector.
is sensed.
hole
using
When
This
ms).
When using the
With no
signal is provided by the
Normally,
this signal is at a
media Soft
indicates
pulse
Index/Sector
diskette inserted,
4.1.2.3 Read Data
interface line provides the
This
this signal is a
and bit
logical one level and
shift tolerance
within normal media
this interface signal
track)
and the
stepper is locked on track.
heads are not at
is issued
logical one level
Sectored, there will be one
physical beginning of a
the
signal, look
this signal
remains active or
"raw data"
the
to
drive each
for an edge or transition
(clock and data together)
becomes a logical
variations.
indicates when the
This signal is at a
track zero. When the
a mechanical stop will keep the
drive,
time an
index
and makes the
pulse on this
track. Refer
at a logical zero level which
zero level for the
sector hole is sensed at the Index/Sector
or
transition
interface signal per
Figure
to
rather than a
as detected by the drive
active state. Refer to Figure 17
read/write heads are positioned at
drive's
logical one level, or inactive
drive's read/write heads
read/write heads at
the logical zero level each time a
to
revolution of the diskette
14.
level
determining its status.
for
is
erroneous status.
an
electronics. Normally,
are
track zero
at
for
the
track
photo
(200
timing
14
-200
MS
± 5.8
ms-
FIGURE
SECTOR 14 .
i
12.50 MS
± .65 MS
FIGURE
INDEX
14.
SECTOR 15
)4*(
12.50 MS
± .65 MS
INDEX/SECTOR
15.
SECTOR
9
20.0 MS
±72 MS
TIMING
SECTOR 16
»->«
(SOFT
SECTORED
.
»+*
"LTLrur
6.25 MS
±
SECTOR 10
.
•+
10.0 MS
± .35 MS
MS
.325
TIMING
*-
.5 MSMIN.
(SA115
»+*
rur
SECTOR
OR
SECTOR
.5 MS MIN.
1
•
SA165
1
*4*
MEDIA)
SECTOR 2
kf
k
SECTOR
4.775 MS
MEDIA)
2
(MAX.)
4.1.2.4
interface
This
The
ed.
diskette installed
tected
4.1.2.5
FIGURE
Write Protect
signal is
signal is logical
Drive Status
INDEX/SECTOR
16.
*
"*
=
LEADING EDGE OF BIT
A
=
LEADING EDGE
B
FIGURE
provided by the
when it is
level
zero
addition to
in
(Refer to
Paragraph
250 NS
NS
± 50
LI
B
OF BIT
17. READ
drive to
notifying the
give the
protected with
TIMING (SA117
8.0/iS
"*
NOM.
u
MAY BE ±
MAY BE ± 400
DATA
user an
interface
8.4)
OR
4.0^s
^
NOM.
LI
FROM ITS
800 ns
ITS NOMINAL POSITION
FROM
ns
TIMING (FM)
indication when
label over notch.
(refer to
paragraph 8.5).
4.0^S
NOM.
MEDIA)
«
u
SA167
U
I
B
NOMINAL POSITION
Protected
Write
a
drive will
The
Diskette
inhibit writing
is install-
with a
pro-
15
4.2 Power
The
SA410 or SA460
on the
component side
P2/J2
pin
designators are
For multiple
drives
in the
Interface
requires
of the PCB
drive
systems the current
system.
only DC
near the spindle drive
outlined in table
requirements
power for operation.
motor. The
The
1.
specifications
are a
DC
power
outlined on
multiple of
to the drive is
two DC voltages,
current
the maximum
requirements
provided
their
current times
via
specifications
P2/J2
are
for
one
the number
located
and
drive.
their
of
P2PIN
1 + 12VDC
2 + 12 Return
3
4
TYPICAL
CURRENT
REQUIREMENT
AMPS
DC VOLTAGE
5 Return
+
5VDC
+
TOLERANCE
± 0.6VDC
0.25
±
2.20 A MAX.
1 .3 A TYP.
70A MAX
.50A
TYP.
1
MAX
00
mV
RIPPLE
max
to
(p
allowable
p)
POWER
~~f
±12
ON
VOLTS
5 VOLTS
TABLE
4.2.1 Frame
It is important
in
drive
noise
Ground
that the drive
susceptibility.
be
frame
MOTOR
START
1. DC
grounded
MOTOR
RUNNING
POWER
to the host
DOOR
LOCK
REQUIREMENTS
system AC or frame
16
STEP
WRITE
ground.
Failure
STAND
to do so
BY
may
result
PHYSICAL
5.0
electrical
The
Jl,
tor,
section
This
them.
provides
describes
Refer to
INTERFACE
interface
the
Figure
between
signal
physical
the
for
18
the
interface
connector
and
or
the
SA410
connectors
locations.
SA460
second
used
the
and
connector,
on the
drive
system is
host
J2,
and
DRIVE PCB
via two
provides
the DC
recommended
CONNECTOR
P1
SCOTCHFLEX
3463-0001 OR
AMP P/N
connectors.
power.
connectors
P/N
583717-5
The
to be
first
connec-
used
with
Jl/Pl
5.1
Connection
19. The
odd
corner
The
pins are
numbered
and
recommended
FIGURE
Connector
1 is through
to J
numbered
on the
pins
labeled
is
connectors
18.
34
a
through
1
non-component
key
2. A
FRAME GROUND
AMP P/N
61664-1
INTERFACE
pin PCB
34 with
provided
slot is
for PI
are
CONNECTORS-PHYSICAL
connector.
edge
the
side.
between
shown in
even
Pin
The
numbered
2 is located
pins 4
Figure
18.
AMP P/N
dimensions
pins on
the
on
for
and
6
641737-1
P2
AMP
LOCATIONS
this connector
for
component
the
end of
the PCB
optional
CONNECTOR
1-480424-0
P/N
side of
connector
connector
shown in
are
the
keying.
Figure
PCB and
closest to
the
the
17
KEY
SLOT
063"
NOM.
(2X)
5.2 J2/P2
The DC power
motor.
Connector
is
J2
connector,
a4pin
AMP
AMP P/N 1-480424-0
Wire
used should be #18
5.3 Frame Grounding
The
drive must be frame
fastened
must be connected
can be attached
directly
to the
to the drive. For this purpose,
or soldered. The tab is AMP
BOARD
FIGURE
J2, is mounted
19. J1 CONNECTOR
Mate-N-Lok
utilizing
AWG.
AMP
pins P/N 61473-1.
Figure
FIGURE 20.
grounded to the host
frame of
the host system with
THICKNESS
on
the
component side
connector P/N
20 illustrates
® ® ®
J2
system
a good
a faston
P/N 61664-1
.062 ±
.007"
DIMENSIONS
641737-1.
J2, pin
J2
connector
CONNECTOR
insure
to
AC
tab is
and
of
the
PCB and
The
recommended
is labeled
1,
as
seen
®
proper
ground, a wire
operation.
provided
its mating
is
located
on
the
on PCB
If
from
on the
drive where
connector is
near
the
mating
component
from
the
the system
the rear
frame
connector
side
of the drive
AC frame
a faston
AMP P/N 60972-1.
spindle
of the
of the
drive
(P2) is
PCB.
drive.
is not
ground
connector
18
.834
(2.12
Mounting Holes
4 on
bottom,
each side
on
2
#6-32 x 25
MIN.
(.63)
DP..
(8X)
+
.050
± .13)
MINI PCB
(4X)
FIGURE 21. PHYSICAL
19
DIMENSIONS
DRIVE
6.0
This
section
6.1
Mechanical
PHYSICAL
contains
the mechanical
Dimensions
SPECIFICATIONS
dimensions
and mounting
recommendations
for
the SA410
or
SA460.
Refer
6.2 Mounting
As
1.
2.
Figure
to
shipped from
Top Loading
Front
Loading
21 for
dimensions
the factory,
-mounted upright.
-mounted
-mounted
DOWN.
•
of
the
drive is
vertical
horizontal
the SA410/460.
capable of
with
door opening
with PCB
up. DO
•
RECOMMENDED
being
mounted
left
or right.
NOT
in one
of
the following
HORIZONTAL
MOUNT
positions:
WITH
PCB
FIGURE
NOT
RECOMMENDED
22.
RECOMMENDED
20
MOUNTING
RECORDING
7.0
General
7.1
FORMAT
format of
The
data can be
ten at
Byte
7.2
A Byte,
secutive
7. When
cell
(bit cell
During a
Correspondingly,
last.
transferred last.
When
reading,
Figure
read
recorded on
the start
when
cells. The most
bit
3).
write operation,
is being read
data
the most
illustrates
23
and write
BYTE
_njnjnjnjn__jn___TLn_n
BIT
data recorded on
the
the
of their
referring to
reference
respective
serial data
significant
is made to a
bit cell of
the most
back from the
significant byte will be
relationship
the
data.
CELL BIT CELL
1
MSB
diskette
the
diskette using
bit cells and
(being
bit
specific data
each byte
significant byte of
drive,
the
of
BIT CELL
2*3
is totally a
MFM
FM or
data bits
written onto or
cell is defined as bit
bit (i.e.,
is transferred to
data is
bit cell of each byte
transferred
bits within a byte
BIT CELL
function of the host
encoding. In these
at the
data bit
transferred to the
first from
BIT
CELL BIT
4
centers of their
read from
cell and
3),
disk drive first
the
will be
the drive to the
Figure 24
and
CELL
5
system
encoding
disk drive), is
the
the least
with respect to
it is
disk
transferred first with
illustrates the relationship
As
.
techniques, clock
bit cells.
significant bit
with bit cell
first and the
user.
discussed in
defined as
corresponding
the
least
bit cell
Section
bits are writ-
eight
defined as
cell is
being
7
significant byte
last.
7
of
the bytes
tltlti tltltl.
BIT CELL
6
BIT
LSB
CELL
7
BIT
CELL
8
3.6,
con-
(8)
bit
cell
bit
transferred
As with
for
is
BINARY
REPRESENTATION
DATA BITS 1
CLOCK BITS
[BYTE
BIT CELL
FIRST
TO
WRITING AND
DRIVE
BYTE
I
1
OF
DATA TO BE SENT
THE DRIVE
WHEN READING
OF
1
BYTE IS
WHEN
FROM THE
FIGURE
6 7
FIGURE
2a
BYTE
24.
(FM
9
DATA
ENCODING)
11 12
10 I
BYTES
HEXADECIMAL
REPRESENTATION OF
1 CLOCK
13 14
BIT
LAST DATA
DATA BITS
CELL 7
(CA)
BITS
15
OF BYTE "N" IS
TO
BE
THE DRIVE WHEN WRITING
AND FROM THE
WHEN READING
(FF)
16
SENT TO
DRIVE
BYTE
N
21
7.3
Formats
Tracks may be formatted in
either hard
or soft sectored formats.
7.3.1 Soft Sectored
In
this format, the using system may
physical index pulse
and then each record is
ed soft sectoring. Figure
mended double
PHYSICAL
INDEX
HEX BYTE
NUMBER
OF BYTES
16 RECORDS
10 RECORDS
RECORDS
5
RECORDS
2
RECORDS
1
density
n
GAP
1
FF
16
numerous ways
Recording Format
illustrates
25
(MFM)
SYNC
00
UPDATE WRITE
NOTES:
Track
1
IBM
2
FB for Data
3.
Number,
or Equivalent
or
Head
F8
CRC
for
Number.
Generator.
Deleted
formats.
-ID
I AM
FEED
and is dependent
record one long
preceded by
the recommended
FIELD-
ID
I
Sector
Data.
-t><>-
CRC
I
LU
Number.
REPEATED
GAP
2
FF
Sector Length.
on the using
record or
a unique recorded identifier.
single density
FOR
EACH
SYNC I
| 00
several smaller records.
(FM) formats.
RECORD
-DATA FIELD
AM
DATA
USER
DATA
s
128
256
512
1024
2048
system. The
i I
CRC
I OFF
I
m
WG
FF
SA410
Each
This
Figures
GAP
3
FF
26
19
70
499
type
of recording
26 shows
GAP
4
FF
101
69
54
5
1032
or SA460
track
is started
the recom-
J
can
is call-
use
by
FIGURE 25.
NUMBER
OF
BYTES
HEX BYTE
UPDATE
WRITE
NOTES:
1. First three
2. Track Number, Head Number.
3. IBM or Equivalent CRC Generator.
4.
FIGURE
RECOMMENDED SOFT SECTOR SINGLE DENSITY
n
GAP 1
32
4E
Hex FE.
Same as Note
bytes are Hex A1 with missing Clock Transitions between
MFM
26.
•
REPEATED FOR EACH
^ ID FIELD'
syncIamI
12
00 1
except last
1 ,
NOTE
byte
ID
I
NOTE NOTE
2
Number,
Sector
=
Hex FB.
CRC
3
Sector Length (Hex
GAP
RECOMMENDED FORMAT
a
NEW RECORD-
SYNC
2
I
22
!
4E
j
-
256
AM I DATA
12 4 256 2
NOTE
00
bits
01)
BYTES/16
(FM) (EVEN
BOUNDARIES)
-DATA FIELD-
USER
4
DATA
4
and 5. Last byte is
I
CRC
NOTE
3
I
WGOFF
1
4E j
j
1
RECORDS PER TRACK (IBM TYPE)
GAP
3
54
4E 4E
GAP
4
250'
22
7.3.1.1
Track
Layout
is
Index
generate
for
and
ID
Data
physical
the
Ready
the
deselect
a
Gap 1-G1
dex
Field-Sync
of
ID Pre
rules.
ID
rules.
ID
ID-if
length.
CRC-is
2-Gap
Gap
core
Field-Sync
minimum
Pre
encode
Data
encode
Data
Data-is
CRC-is
WG
3-Gap
Gap
bytes,
around
Gap 4-G4
ing a
detector
signal in
storage
is from
variation,
a fixed
is
bytes
two
Address
Address
Address
four byte
a
two
from
clearance
is
Data
rules.
Address
rules.
Address
OFF
from
speed
time to
the
is
format
the
device
physical
the
speed
number
plus
Mark
Mark
bytes for
CRC to
ID
of
fixed
a
two
of
Address
area
the
two bytes
(Write Gate
WG
and
gap
last
write and
indicating one
signal
device,
after a
storage
index
variation
bytes
of
case
worst
(MFM)
Mark
(FM)-is a
(MFM)-is one
address
ID
number
bytes
Mark
Mark
for
OFF to
write
read the
containing
cyclic
data
CRC bytes
of
plus
Mark
(FM)
(MFM)
user
cyclic
for
Off) -is
next
oscillator
following
prior to
physical
AM sync
bytes
(MFM)
-is a
data.
physical
revolution
insure one
certain
mark to the
interchange
and
Separator
for
Separator
-Three
unique
byte to
byte of
track
redundancy
and
prior
Separator
for
case
worst
-Three bytes
unique
-is one
byte
redundancy
one byte to
AM sync
ID
variation,
ID
index
index
of
number
ID
sync up
of Al
bytes
FE and
number,
check.
allows
write
to
separator
byte to
of FB or
check.
allow
and
read
Field.
and
variation.
and
media
the
complete
field address
between
synchronization
identify
revolution
revolutions.
of
storage
requirements.
unique
with
the
is written
it
head
speed
for
on for an
turn
gate
synchroniztion
sync up
Al with
of
identify
allows for
allows
the
and it
F8
Write
for
preamplifier
for
is used to
of the
sync and
mark
devices.
prior
clock bits
field and
ID
the
per
number,
variation,
record
update
prior to
requirements.
unique
clock
Data Field
written
is
turn
Gate
core to
erase
recovery
and
speed
initiate
media has
AM.
to
not
written
not
encode
number,
oscillator
write.
AM.
the
bits not
and it
per the
after an
off
clear the
time and
oscillator
write
format
allows
Includes
written
rules.
variation
Includes a
is not
encode
operations,
searched,
been
physical in-
for
minimum
a
per
per the
record
and
and
written per
written
rules.
update
Data
system
write.
Field
turn
variation
encode
encode
erase
the
per the
CRC
dur-
this
these
Hard
format,
Figure
formats.
7.3.1.2
In
physical index
toring.
ing
Sectored
using
the
pulse and
27 illustrates
Recording
the
may
sector
hard
system
each
Format
record
started
is
sectored
up to
by a
formats.
sectors
10
or
16
physical sector
tolerances
drive
All
23
(records)
pulse.
per
This type
been
have
track.
of
taken
Each
recording
into
track is
started
is called
account in
by a
sec-
hard
develop-
PHYSICAL
SECTOR
NUMBER
OF
BYTES
1
RECORDS
6
FM
n
AM
G1
16
SYNC
00
6 1
ID
FB
m
4
DATA FIELD
LH
128
CRC
LU
2
G2
FF
36
10 RECORDS
MFM
HEX
BYTE AA
NUMBER
OF BYTES
16 RECORDS
10
RECORDS
UPDATE WRITE
16
FIGURE
FF
OB
1
6
NOTES:
27. RECOMMENDED
4
Track
1
2. User Data.
3. Generated
Number, Head Number, Record
.
256
m
256
512
by CRC Generator (IBM or
HARD
SECTOR
s
2
Number,
Equivalent).
FM
AND
25
AA
101
79
Record
Length.
MFM FORMATS
24
CUSTOMER
8.0
INSTALLABLE
OPTIONS
SA410/460 can be
The
implemented by
be
can
This section
trace.
DRIVE SELECT,
1.
2. DOOR
3. SIDE SELECT,
DRIVE
4.
WRITE PROTECT
5.
LOCK from
STATUS
TRACE
DESIGNATOR
U3
DS1
DS2,3,4
modified by the
adding or deleting
discusses
examples of midifications
MOTOR ON and IN
USE
IN
DIRECTION SELECT
using
user
function differently than the standard method. These
to
connections. Options can be
USE
DRIVE SELECT
or
DESCRIPTION
Terminations for
Standard
DRIVE
Inputs
SELECT
DRIVE SELECT
and how
Multiplexed
1 input line
input
2,3,4
selected by
install them.
to
lines
of a shorting plug or a cut
use
The examples are:
SHIPPED
FROM
OPEN
X
modifications
FACTORY
SHORT
plugged
plugged
MX
MS
SS
SD
DD
DO
Rl
RD
DA
DRIVE
Single Drive
MOTOR
Standard
SELECT
ON
SIDE
SIDE SELECT
DIRECTION
DOOR DISTURB
DOOR
READY
READY
DOOR
TABLE
OPEN
INDEX
DOOR
LOCK From
CUSTOMER
2.
Enabled
System
DRIVE SELECT
From
SELECT
Option
SELECT
using
DRIVE SELECT
CUT/ADD
TRACE
X
X
plugged
X
plugged
plugged
X
X
OPTIONS
25
FIGURE 28
COMPONENT
26
LOCATIONS
DS4X-
DS3*-
DS2x-
DS1X-
14
12
10
5V
+
_T
MX
DDDD
8.1
ON
Drive
USEX-
IN
MOTOR
Select
—D-CH>Lhr-
DS4
DS3
DS2 DS1
5V
4>
-
+5V
16
y
DRIVE
FIGURE
29.
t-i>
a
MS
H>
SELECT,
H>
H>
MOTOR
ON
AND
TP13
IN USE
IN
+ 5 V
MOTOR ON
SELECT
USE
LED
DRIVE
The
operate
to
multiplexed
SELECT
alone in
multiple
DRIVE SELECT
The MX
The
option
MS option
Jumper (DS1,2,3,4)
drive
single
a
system.
drive
line.
used for
is
allows the
single
motor
system.
This is
drive
to be
drive is
the
as
can be
It
done by
systems. By
enabled from
easily
shipped
modified to
selecting
shorting MX
DRIVE
27
is in
specific
SELECT.
position
operate
drive
the
I/O
DS1.
with
address
lines are
The SA410/460
in a
drives
other
jumpering
and
always
enabled.
is configured
chained,
daisy
appropriate
the
X-
IN USE
+ 5V
5V
+
-//-
DRIVE
SELECT
>
+ 12V
DOOR
DOOR OPEN
8.2 The Door Lock Solenoid (Option)
The Door Lock Solenoid can be activated
The DA option allows the Door Lock Solenoid
been asserted
LOCK
a logic zero.
to
FIGURE
30. DOOR LOCK
by the
ct>
FROM IN
interface line
be activated when the IN USE
to
USE OR DRIVE
provided on PIN 2.
SELECT
DRIVE SELECT
or
Signal has
28
*^
DIRECTION
SELECT
+
32
SIDE
SELECT
5V
5V
+
—SIDE
1
Side Select
8.3
SIDE SELECT
The
DIRECTION
(head)
selection during
function
SELECT
FIGURE
can be
line controls
read/write
31. SIDE
controlled
the direction
operations. To
SELECT, USING DIRECTION
via the
DIRECTION
head motion
of
implement
this
SELECT
during
option,
SELECT
if desired.
line,
stepping
simply move
With this
operations and
jumper
SS to
option, the
controls
location
side
SD.
29
INDEX
+
+ 5V
8.4 Drive
This interface
ed. The DRIVE STATUS
(a)
(b)
(c) an INDEX/SECTOR
If
the DRIVE STATUS signal
again: if the door had
WILL ACTIVATE
Condition
optionally
if MX is
Status
signal gives the user
the door is closed
the door has
not
upon
(b) may
be eliminated by cutting
shorted (see Figure
optionally be eliminated by cutting
been
previously
FIGURE 32.
indication
an
signal is active,
opened since the drive was last
pulse has been
is inactive,
been disturbed
sensing an INDEX/SECTOR
trace RI and
since condition
29),
that a
at a logic zero level, when
sensed since
the user may
(condition (b) was not
shorting trace RD.
(b) will
DRIVE
diskette is inserted correctly in
STATUS
the following
deselected;
the previous
deselect and then select
and
conditions were met.
the drive
met) but is now
pulse.
trace DD and
shorting
One
trace DO. Conditions (b)
these two options
of
not be met.
the drive and
conditions are
to test
closed, DRIVE
must be
the
door
met:
DRIVE
and
implemented
is
clos-
STATUS
STATUS
may
(c)
30
SELECT
5V
+
FIGURE
33. WRITE PROTECT
8.5 Write Protect
This interface signal is provided
ed. The signal is logical zero level when it is protected with label over notch. Under
inhibit writing
to the diskette is inhibited unless a label is installed over the notch.
with a protected diskette installed in
by the
drive
to
give
addition
user an indication when a Write
the
notifying
to
interface. If
the
Protected Diskette is install-
normal operation, the drive
is
"WP" trace
the
cut,
writing
will
31
OPERATION PROCEDURES
9.0
The SA410
tions.
Minidiskette Loading
9.1
or SA460 was designed for ease of operator use to
The following
section
is a guide for the
To load the diskette, open the door on the front
close handle. A
damage.
Minidiskette Handling
9.2
To protect the
precautionary procedures are as
Return
1.
2. Do not bend or fold the
3. Store
4. Keep
ed. Strong
5. Replace storage envelopes
tect the
6. Place
mechanical interlock prevents door
diskette,
diskette to its storage envelope
the
diskettes
diskettes away from magnetic
not
same care and
the
follows:
diskette.
for immediate use in
handling procedures specified for computer magnetic tape
their box.
fields and from ferromagnetic materials
magnetic fields can distort recorded data on the
when
disk.
I.D. labels in the correct location,
become worn, cracked or distorted.
they
never
facilitate
range of operator oriented applica-
a wide
handling procedures on the minidiskette and minifloppy drive.
panel, insert the diskette
closure without proper media insertion, thus eliminating
with label towards the door handle and
media
apply.
These
whenever it is removed from drive.
which might become magnetiz-
disk.
them in layers.
use
Envelopes are designed
pro-
to
7. Do
8. Do not use
9. Heat
10. Do not
not write on the
and contamination from a carelessly
expose diskette to heat or sunlight.
erasers.
plastic jacket with
lead pencil or ball point pen. Use a felt tip pen.
a
dropped ash can damage the disk.
32
INSTALLATION
10.0
All 410's
tainers.
tainer
The
eliminates
and 460's
carriage stop is
the
PACKAGING
OF
shipped
from
designed to
possibility of
MATERIALS
the factory and
prevent head
breakage
resulting from
regional
carriage
depots are
movement
the door
equipped with
while the drive is in
opening
during shipment.
carriage
stops
transit.
and door re-
The door
re-
receipt
Upon
reinstalled
prepare a
To
A.
B.
C.
D.
Failure to
the
of
prior to
drive
follow
the
the door
this
Locate
Insert the
Figure 34).
Install
pin slots
Place the
drive, the door
further
any
shipment:
for
head carriage at
carriage stop
retainer by
bending the
and
in its
drive
procedure
retainer
and
shipment of the
Track 00.
as you
sliding the
tabs
would a
down over the
packing container
result in damage to
may
carriage stop should be
drive.
diskette, with
center section
(with the tabs
hub frame
and
(see Figure
36
the drive
removed
the tab
(see Figure
37).
and
under the
nearest
35)
retained. They
carriage (see
head
PCB), into the
the
must be
door
FIGURE
CARRIAGE
34.
STOP
33
FIGURE
DOOR RETAINER
35.
34
CAUTION
SHEET
CONTAINER
LID,
FOAM PAD,
PCB
FIGURE
36.
DRIVE
35
BASE,
CONTAINER
CONTAINER
DRIVE
CONTAINER
SIDE
PAD
FIGURE
37. SHIPPING
36
CONTAINER
CARD
BOARD
CONTAINER
Shugart
PN:
Pub.
Subject:
39024-0
Date:
+
9/80
& 6/81
pin
J2
Figure
shows
the
to
Page 20,
INCORRECT
-1
designations
20
pin
figures
Product:
Pub.
(page
numbers
39024-0
P/N
PUBLICATION
CHANGE
SA410/460
Type: OEM
P/N
20,
reverse
in
follows:
as
475 Oakmead
Parkway,
Sunnyvale,
NOTICE
Date:
39024-0 and page
order.
CORRECT
CA
10-29-81
18,
Make
ink
94086
P/N
Telephone:
Errata:
39024-1)
corrections
733-0100
(408)
#
l
©
Page
INCORRECT
©
©
®
® ©
18,
© ©
P/N
39024-1
12
+
12VDC-
+
VDC-
-©
<D ®
®
®
CORRECT
®
©-
©-
5VDC
+
5VDC
+
^Shugart
Copyright
1977
475
Telephone:
39024-1 6/81 PRINTED
P/N
Oakmead Parkway
733-0100 TWX: 910
(408)
Sunnyvale, California 94086
SHUGART SUVL
9355
339
IN
US A
Loading...