FDD
OEM MANUAL
SFD-321B
3.5inch DUAL DENSITY
MICRO FLOPPY DISK DRIVE
SPECIFICATIONS
SEMA ELECTRONICS CO.,LTD
XiaLingBei HengKeng Management Area
Liaobu Town Dongguan City
Guangdong Province, China
SEMA ELECTRONICS CO.,LTD
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PAGE
2
FLOPPY DISK DRIVE SPECIFICATION
MODEL
SFD-321B
7. SAFETY STANDARDS
8. PACKAGING DESCRIPTION
8.1 Label Description
8.2 Packaging Method
8.3 Pallet Dimension and the Method
9. OPTION SELECTION
9.1 Trace Options
9.2 Other Options (Buyer Selection)
10. GENERAL COMMENT
※
LIST of FIGURES
Figure 2-1. Physical Dimensions (With Bezel Type)
Figure 2-2. Physical Dimensions (Without Bezel Type)
Figure 3-1. Installation
Figure 4-1. Signal Interface Connector and Cable Side Connector
Figure 4-2. Power Interface Connector and Cable Side Connector
Figure 4-3. Rear View of FDD
Figure 8-1. Packaging Method
Figure 8-2. Pallet Dimension & Method
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PAGE
3
FLOPPY DISK DRIVE SPECIFICATION
MODEL
SFD-321B
1. INTRODUCTION
1.1 Application
This manual shall be applied for SAMSUNG SFD-321B - double side, dual
density (option : 3 mode), 3.5 inch micro floppy disk drive
(hereinafter referred to as "FDD").
1.2 Disk Used
3.5 inch micro floppy disks (hereinafter referred to as "DISK"),
the use of which will be mutually agreed between the customers and
SAMSUNG, shall be used.
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PAGE
4
FLOPPY DISK DRIVE SPECIFICATION
2. GENERAL SPECIFICATIONS
MODEL
SFD-321B
2.1 Performance
LOW
DENSITY
STANDARD
HIGH
DENSITY
STANDARD
2MB
HIGH
DENSITY
*OPTION*
1.6MB
I T E M
1MB
Per Disk
1000
2000
1600
Unformatted
Formatted
Per Track
6.25
12.5
10.0
Capacity
(KBytes)
655.4 (16)
737.3 (9)
819.2 (5)
1310.7 (32)
1474.6 (18)
1638.4 (10)
1065.0 (26)
1228.8 (15)
1310.7 (8)
Per Disk
(Sector / Track)
Recording Density (BPI)
-Inner Most Track, side 1
8,717
250
17,434
14,528
Data Transfer Rate (KBits / sec)
500
-MFM recording
Number of Heads
Number of Tracks
Track Density (TPI)
2
160
135TPI (5.33 Tracks / mm)
300 RPM 360 RPM
Rotational Speed
LSV
±
±
1.5 % Max.
1.5 % Max.
Drive Motor
Specification
ISV
Start Time
500 ms Max.
3 ms
Track to Track
Time
Access Time
Head Settling Time
15 ms Max.
Head 1 is displaced 8 tracks toward the
drive spindle direction.
Head 0 / Head 1 Offset
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PAGE
5
FLOPPY DISK DRIVE SPECIFICATION
MODEL
SFD-321B
LOW
DENSITY
STANDARD
HIGH
DENSITY
STANDARD
2MB
HIGH
DENSITY
*OPTION*
1.6MB
I T E M
1MB
Inserting
800 gr Max.
1300 gr Max.
10 ~ 70 mm
Media Operating
Force
Ejecting
Media Ejecting Distance
Acoustic Noise at 50 cm
- at 3 ms Step Rate
50 dBA Max.
Read Bit Shift
1300 ns Max.
650 ns Max.
1. Measured with Brikon 723B on Track 79
with 0 ns precompensation on both heads.
Asymmetry
600 ns Max.
300 ns Max.
1. Measured with Brikon 723B on Track 00
with 0 ns precompensation on both heads.
Both R/W heads must be radially aligned to all tracks
±
within
0.0200 mm when accessed from either
direction.
Radial Alignment
Measurement is to be made at normal voltage and
normal environmental condition
±
(23
℃
±
2
and 50 5 % RH)
±
°
′
18 Max.
Azimuth Alignment
Index to Data Burst
0
μ
0 ~ 1300
s
Measurement is to be made from the leading edge of
index pulse to the beginning of data burst on
Track 40.
Overwrite Modulation -26 dB or less at Track 00
* Read/Write Compensation : 125ns is recommended
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PAGE
6
FLOPPY DISK DRIVE SPECIFICATION
MODEL
SFD-321B
2.2 Environmental Conditions
ITEM
SPECIFICATION
℃
∼
∼
∼
Operating (
)
0
-40
-40
50
70
70
℃
Storage (
)
Ambient
Temperature
℃
Transportation (
)
Operating
Non-operating
20 Max.
30 Max.
Temperature Gradient
℃
(
/ Hr)
℃
℃
∼
∼
Operating : 29
Storage : 40
Max. wet bulb temp.
Max. wet bulb temp.
20
0
80
90
Relative
Humidity (%)
*No-condensation
℃
Transportation : 45
Max.
wet bulb temp.
∼
0
90
5 ~ 100 Hz frequency range
Operating 100~ 200 Hz frequency range
200~ 600 Hz frequency range
1.5 G Max.
1.0 G Max.
0.5 G Max.
Vibration
(30 min. sweep
cycle)
*Exclude
resonant
frequency
Transportation : 5 ~ 600 Hz
frequency range
3
5
G Max.
G Max.
Operating
Shock (11 ms
half sine wave)
Transportation
100 G Max.
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PAGE
7
FLOPPY DISK DRIVE SPECIFICATION
MODEL
SFD-321B
2.3 Reliability
I T E M
SPECIFICATION
20000 power on hours (POH)
(25% duty)
M.T.B.F.(Mean time between failures)
M.T.T.R.(Mean time to repair)
Component Life
Disk Life
30 minutes Max.
5 years
6
×
3
3
10 passes per track or more
4
×
Disk Insertion
10 times or more
Soft Read Error
(*1)
1 per 109 bits read
1 per 1012 bits read
1 per 106 seeks
Hard Read Error
Error Rate
(*2)
Seek Error
(*3)
<Note>
(*1) A soft (recoverable) error is defined as a successful attempt to read a track
of data within 3 retries after a read failure.
A read retry is defined as an attempt to read the entire track that a read
failure occurred on.
(*2) A hard (non-recoverable) error is defined as a failure to read a track of
data within 3 retries after a read failure.
(*3) A seek (access) error is defined as the inability of the drive to seek to
a targeted track within 1 retry. An access retry is defined as one recalibration
with an attempt to seek to the targeted track.
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PAGE
8
FLOPPY DISK DRIVE SPECIFICATION
MODEL
SFD-321B
2.4 Power Supply
I T E M
SPECIFICATION
±
Required Power
D.C. 5 V
10 %
Allowable Ripple Voltage
100 mVp-p (including spike noise)
Average Current
Typ.
Average Power
Operating Mode
Typ.
Stand - by
2 mA
10mW
1.5 W
1.5 W
3.5 W
3.5 W
Power
Read Operation
Write Operation
Seek Operation (3 ms)
Drive Motor Start
0.3 A
Consumption
0.3 A
0.7 A
0.7 A
+5 V (*1)
Current (A)
0.7 A Typ.
0.7 A Typ.
0.3 A
500 ms Max.
18 ms Max.
2 mA
Stand-by
(*2)
Spindle motor ON
Read /
Write
Seek
<Note>
(*1) Typical values are specified at 5.0 V
(*2) Stand-by : Under the condition that all input lines are inactive.
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PAGE
9
FLOPPY DISK DRIVE SPECIFICATION
MODEL
SFD-321B
2.5 Physical Specifications
I T E M
Width (mm)
SPECIFICATION
101.6
Mechanical
Dimension
Height (mm)
Depth (mm)
25.4
145.0 (without Front Bezel)
460.0 typ.
Weight (gr)
External View
Refer to Fig. 2-1 and Fig. 2-2
Refer to Fig. 2-1 and Fig. 2-2
Installation Holes
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PAGE
13
FLOPPY DISK DRIVE SPECIFICATION
MODEL
SFD-321B
4. ELECTRICAL INTERFACE
4.1 Signal Interface
Density Select
In Use (Spare)
Drive Select 3 (Spare)
Index
2
4
6
8
10
Drive Select 0
Drive Select 1
12
14
Drive Select 2 (Spare)
HOST
FDD
Motor On
16
18
20
22
CONTROLLER
SFD-321B(*1)
Direction Select
SYSTEM
Step
Write Data
Write Gate
Track 00
24
26
28
30
32
Write Protect
Read Data
Side Select
Ready/Disk Change
34
<Note>
(*1) All odd numbers : GND
4.2 Power Interface
+5 V
1
2
HOST
+5 V Return (GND)
FDD
SFD-321B
CONTROLLER
No Connection (GND)
POWER
3
4
No Connection
SUPPLY
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PAGE
14
FLOPPY DISK DRIVE SPECIFICATION
MODEL
SFD-321B
4.3 Interface Connectors
4.3.1 Signal Interface Connector
Side
FDD
Connector
HIROSE P/N 5003-001-7347 or equivalent (*1)
3M NO. 7934 or equivalent
HOST (Connector)
HOST (Cable)
3M 3365/34 or equivalent (*2)
<Note>
(*1) 33 pins, 2.54 pitch (Pin #3,5,7,9,13,15,17,19,23,25,27,31 : cut off)
Wall Type
(*2) Cable length : 1m (3.3 feet) Max.
2 4
1 3
~
~
34
PCB
33
PIN NO.3,5,7,9,13,15,17,19,23,25,27,31 : Cut off
Rear View
FRONT
Top View
< Signal Interface Connector (FDD) >
< Cable Side Connector (HOST) >
Fig 4-1. Signal Interface Connector and Cable Side Connector
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PAGE
15
FLOPPY DISK DRIVE SPECIFICATION
MODEL
SFD-321B
4.3.2 Power Interface Connector
Side
FDD
Connector
ELCO P/N 9251-004-000-809 or equivalent
AMP 171822-4 or equivalent
AWG #20-26
HOST (Connector)
HOST (Cable)
< Power Interface Connector (FDD) >
< Cable Side Connector (HOST) >
Fig 4-2. Power Interface Connector and Cable Side Connector
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PAGE
16
FLOPPY DISK DRIVE SPECIFICATION
MODEL
SFD-321B
5. SIGNAL CHARACTERISTICS
5.1 Signal Level
Signal Logic
Low (True)
High (False)
Input Level
0.9 V Max.
2.2 V Min.
Output Level (*1)
0.4 V Max.
2.4 V Min.
<Note>
(*1) "LOW" level Max. sink current is 48 mA.
5.2 Recommended Interface Circuit
HOST SIDE
FDD SIDE
Vdd
7438 SERIES
CMOS OR
EQUIVALENT
CMOS
㏀
(1
)
(SCHMITT TRIGGER INPUT)
INPUT
Vdd
Ω∼
㏀
150
(1
2.2
㏀
is recommended)
OUTPUT
74LS14
74HC14 OR
EQUIVALENT
OPEN DRAIN
FRAME GND
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PAGE
17
FLOPPY DISK DRIVE SPECIFICATION
MODEL
SFD-321B
5.3 Input Signals
5.3.1 Density Select
This siganl is used to distinguish between 1.6MB and 2MB Mode.
The interface pin No.2 can be used as Density Select Input signal by
Ω
attaching 0
is inserted. The "HIGH" level designates 2MB Mode and the "LOW" level
designates 1.6MB Mode. FDD can tell whether the inserted media is high
resistor onto "OPA" short plug when the High density media
or Low density by checking the signal coming from mechanical switch which
detects the density selecting hole on the media.
Type
Contents
Automatic Switching
2 Mode
(2.0 / 1.0MB)
(Non-connection of "OPA")
2.0MB : If High density media is inserted.
1.0MB : If Low density media is inserted.
Automatic Switching with "Density Select"
2.0MB : If High density media is inserted
with "Density Select" is "HIGH".
1.6MB : If High density media is inserted
with "Density Select" is "LOW".
3 Mode
(2.0 / 1.6 / 1.0MB)
(Connection of "OPA")
1.0MB : If Low density media is inserted
"Density Select" is not available.
5.3.2 Drive Select 0 and 1
Two trace plugs on the PCB, DS0 and DS1 are provided to select which
Drive Select line will activate the interface signals for a unique drive in the
daisy chain connection up to two drive units. Drive Select, when activated
logical "LOW", enables all the I/O lines except Motor On line.
This signal also controls the lightening of In-Use LED.
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PAGE
18
FLOPPY DISK DRIVE SPECIFICATION
MODEL
SFD-321B
5.3.3 Motor On
Logical "LOW" level of this signal makes the spindle motor be turned on.
The motor reaches to the rated rotational speed within 500 ms after this
signal changes to "LOW".
This input signal is ignored when no disk is installed.
5.3.4 Direction Select
This signal specifies the moving direction of the R/W head when the Step
input is activated.
Logical "LOW" level : the direction to the inner tracks of a disk.
"HIGH" level : the direction to the outer tracks of a disk.
5.3.5 Step
This is a control signal to move the R/W head, and the head starts
moving at the rising edge of the Step signal.
3 ms Min.
㎲
0.15
Min.
5.3.6 Write Data(MFM)
Each time this signal changes from "HIGH" level to "LOW" level,
the direction of the current flowing into the R/W head is reversed,
and the data bit is written on the disk.
㎲
0.15 ~ 1.1
Tw
±
Tc 0.5 %
±
Ta 0.5 %
±
Tb 0.5 %
Density Mode
㎲
Ta ( )
㎲
Tb ( )
㎲
Tc ( )
(Typ.)
(Typ.)
(Typ.)
Density
Transfer Rate
1.0MB
1.6MB
2.0MB
250 kbps
500 kbps
500 kbps
4
2
2
6
3
3
8
4
4
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PAGE
19
FLOPPY DISK DRIVE SPECIFICATION
MODEL
SFD-321B
5.3.7 Write Gate
"LOW" level of this signal enables the write data to be written on the disk
provided that the drive is selected, disk used is not write protected and
seek operation is completed.
When this signal changes to "HIGH" level, the read or seek operation
becomes possible.
5.3.8 Side Select
This signal selects the side of Heads.
Logical "HIGH" level : the lower side (side 0) of Heads
"LOW " level : the upper side (side 1) of Heads
WRITE GATE
㎲
650
Min.
㎲
100
Min.
SIDE SELECT
READ DATA
㎲
100
Min.
㎲
100
Min.
valid
valid
valid
valid
㎲
650
Min
5.4 Output Signals
5.4.1 Index
This is a pulse signal output to indicate the start of the track, and it
outputs at every revolution of the disk.
This output signal is activated when only the drive is in Ready state.
∼
1
8 ms
±
200 3 ms
±
(166.7 2.5 ms)(*1)
<Note>
(*1) The value in parenthsis is for 360 rpm (1.6MB Mode) rotation speed.
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PAGE
20
FLOPPY DISK DRIVE SPECIFICATION
MODEL
SFD-321B
5.4.2 Track 00
"LOW" level of this signal indicates the head is on Track 00 position
and stepping motor is at the specified position respectively.
5.4.3 Write Protect
When a write-protected disk is inserted, this signal becomes "LOW"
and the data on the disk is protected from mis-erasing and
the write operation is inhibited.
5.4.4 Read Data (MFM)
Read Data read out from the disk is transferred to the host system
in the same form as it was received on the Write Data line. Each flux
reversal sensed on the disk produces the only transition from "HIGH"
level to "LOW" level. For the seperation of the clock bits from the data,
the leading edge of a change from "HIGH" to "LOW" level is used.
±
Ta 0.5 %
±
Tb 0.5 %
±
Tc 0.5 %
±
400 ns 20 %
Density Mode
㎲
Ta ( )
㎲
Tb ( )
㎲
Tc ( )
(Typ.)
(Typ.)
(Typ.)
Density
Transfer Rate
250 kbps
1.0MB
1.6MB
2.0MB
4
2
2
6
3
3
8
4
4
500 kbps
500 kbps
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PAGE
21
FLOPPY DISK DRIVE SPECIFICATION
MODEL
SFD-321B
5.4.5 Disk Change / Ready
By selecting proper trace plugs, this signal line (pin #34) can be used for
Ready or Disk Change line.
-. Ready
This line becomes active "LOW" when the drive is selected, a disk is
clamped and the spindle motor is up to speed.
(after counting at least two Index pulses)
Otherwise this line goes logical "HIGH" level.
-. Disk Change
This line is active "LOW" unless disk is clamped and a Step pulse is
received when the drive is selected.
DRIVE SELECT
inserted
ejected
DISK IN
STEP
DISK
CHANGE
㎲
0.5
Max
㎲
0.5
Max
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PAGE
22
FLOPPY DISK DRIVE SPECIFICATION
6. TIMING DIAGRAM
MODEL
SFD-321B
6.1 Seek Operation Timing
DRIVE SELECT
FORWARD
DIRECTION
SELECT
REVERSE
㎲
1
㎲
1
Min.
㎱
500
Min.
Min.
㎳
18
Min. (*1)
STEP
㎲
1
㎳
2.8
Max.
Min.
㎳
㎲
3
Min.
10
Max.
TRACK 00
6.2 Read / Write Operation Timing
㎲
650
650
Min.
Min.
MOTOR ON
㎲
㎳
600
Max.
DRIVE SELECT
㎳
0.3
Max.
READY
STEP
(*2)
DENSITY
SELECT
㎲
100
Min. (*3)
18 ms Min.
0 Min.
㎲
100
Min. (*3)
(*2)
(*2)
READ DATA
WRITE GATE
18 ms Min.
㎲
100
Min (*3)
0 Min.
㎲
8
Max.
㎲
8
Max.
WRITE DATA
<Note>
(*1) Turn Around Time is 18 ms Min. when Direction is changed.
*
㎲
㎲
( 2) 750
Min. (including 100
Side Select timing)
↔
(*3) When spindle motor speed is changed (300 rpm
this value is 500 ms Min.
360 rpm)
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PAGE
23
FLOPPY DISK DRIVE SPECIFICATION
MODEL
SFD-321B
7. SAFETY STANDARDS
This drive is approved by the followings;
. CE
. CSA
. UL
. TUV
. MIC
. BSMI
. FCC
SAMSUNG ELECTRO-MECHANICS CO.,LTD.
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PAGE
24
FLOPPY DISK DRIVE SPECIFICATION
MODEL
SFD-321B
8. PACKAGING DESCRIPTION
8.1 Label Description
8.1.1 Serial Number Label Marking
BAR CODE
F
B
②
T
③
6
④
S
⑤
1
⑥
A
⑦
L
⑧
B
⑨
00001
⑩
FBT6
S1ARB00001
①
①
②
③
④
⑤
⑥
→
→
Product name : "F"
Model name : "B"
FDD
SFD-321B
Revision name (Major)
Revision name (Minor)
Production division : "S"
Production site
→
SEMA ELECTRONICS CO.,LTD
Marking
1
2
China factory
(SEMA China)
Outside supplier
(OEM)
Production site
⑦
⑧
→
Production line : "A"
A-Line, "B" ~ "Z"
Year of manufacturing
Year
2001
M
2002
N
2003
P
2004
Q
2005
R
2006
S
2007
T
Marking
⑨
Month of manufacturing
Month Marking Month
Marking Month Marking Month Marking
1
2
3
1
2
3
4
5
6
4
5
6
7
8
9
7
8
9
10
11
12
A
B
C
⑩
Consecutive number
8.1.2 Label Description
Bar code
①
②
FBT6
S1R1100001
REV. T6
③
****
④
⑪
SFD-321B /
DC5V 0.7V MADE IN CHINA
⑤
⑥
⑦
⑧
⑨
⑩
①
②
③
④
⑤
⑥
⑦
⑧
⑨
⑩
⑪
Serial number
Revision
Buyer name
Production site
CE marking
CSA marking
UL marking
TUV marking
MIC marking (for only domestic)
BSMI marking
Label manufacturer identification
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PAGE
27
FLOPPY DISK DRIVE SPECIFICATION
9. OPTION SELECTION
MODEL
SFD-321B
FDD can be modified for different functions than the standard specification.
These modifications should be implemented by the factory according to the
request of the customers.
9.1 Trace Options
By putting a chip-resistor onto a proper trace, FDD can be used for the
following different functions.
Trace Name
Description
Activate Drive Select 0 line
DS0
DS1
Activate Drive Select 1 line
DC
Activate Disk Change Signal
Activate Ready Signal
RDY
OPA
For 3 Mode usage
For 1.6MB usage
OPB (*1)
<Note>
(*1) Both "OPA" and "OPB" open : 2 Mode (1MB / 2MB)
"OPB" is connected and "OPA" is open : 2 Mode (1MB / 1.6MB)
"OPA" is connected and "OPB" is open : 3 Mode (1MB / 1.6MB / 2MB)
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PAGE
28
FLOPPY DISK DRIVE SPECIFICATION
MODEL
SFD-321B
9.2 Other Options (Buyer Selection)
The colors of In-Use LED, Front-Panel, the value of the termination resistors
and the shape of button can be modified by customers' request.
9.2.1 Mode
□
□
2 Mode (1MB / 2MB)
3 Mode (1MB / 1.6MB / 2MB)
9.2.2 The Selection of Bezel Type
□
□
With Bezel
Without Bezel
9.2.3 The Color of Bezel, Button
□
□
□
Black
Ivory
Gray
Color Number
(Fill in this blank)
9.2.4 The Selection of LED Color
□
□
Green
Red
□
Amber
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PAGE
29
FLOPPY DISK DRIVE SPECIFICATION
11. GENERAL COMMENT
MODEL
SFD-321B
SEMA ELECTRONICS CO.,LTD
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SEMA ELECTRONICS CO.,LTD
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