OEM MANUAL
g
SFD-321B
3.5inch DUAL DENSITY
FDD
MICRO FLOPPY DISK DRIVE
SPECIFICATIONS
SEMA ELECTRONICS CO.,LTD
XiaLingBei HengKeng Management Area
Liaobu Town Dongguan City
Guan
dongProvince,China
SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPECIFICATION
CONTENTS
1. INTRODUCTION
1.1 Application
1.2 Disk Used
2. GENERAL SPECIFICATIONS
2.1 Performance
2.2 Environmental Conditions
2.3 Reliability
2.4 Power Supply
2.5 Physical Specifications
PAGE 1
MODEL
SFD-321B
3. INSTALLATION
4. ELECTRICAL INTERFACE
4.1 Signal Interface
4.2 Power Interface
4.3 Interface Connectors
5. SIGNAL CHARACTERISTICS
5.1 Signal Level
5.2 Recommended Interface Circuit
5.3 Input Sig n als
5.4 Output Signals
6. TIMING DIAGRAM
6.1 Seek Operation Timing
6.2 Read / Write Operation Timing
SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPECIFICATION
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
PAGE 2
MODEL
SFD-321B
※
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
SEMA ELECTRONICS CO.,LTD
PAGE 3
FLOPPY DISK DRIVE SPECIFICATION
MODEL
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 an d
SAMSUNG, shall be used.
SFD-321B
SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPECIFICATION
2. GENERAL SPECIFICATIONS
2.1 Performance
PAGE 4
MODEL
SFD-321B
LOW
ITEM
Per Disk 1000 2000 1600
Unformatted
Per Track 6.25 12.5 10.0
Capacity
(KBytes)
Formatted
Recording Density (BPI)
-Inner Most Track, side 1
Data Transfer Rate (KBits / sec)
Number of Heads 2
Number of Tr acks 160
Track Density (T PI) 135TPI (5.33 Tracks / m m)
Per Disk
(Sector / Track)
-MFM recording
DENSITY
STANDARD
1MB
655.4 (16) 1310.7 (32) 1065.0 (26)
737.3 (9) 1474.6 (18) 1228.8 (15)
819.2 (5) 1638.4 (10) 1310.7 (8)
8,717 17,434 14,528
250 500
HIGH
DENSITY
STANDARD
2MB
DENSITY
*OPT ION*
HIGH
1.6M B
Drive Motor
Specification
Access Time
Head 0 / Head 1 Offset
Rotational Speed 300 RPM 360 RPM
±
LSV
ISV
Start Time 500 m s Max.
Track to Track
Time
Head Settling Time 15 ms Max.
Head 1 is displaced 8 tracks toward the
drive spindle direction.
1.5 % Max.
±
1.5 % Max.
3ms
SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPECIFICATION
PAGE 5
MODEL
SFD-321B
ITEM
Media Operating
Force
LOW
DENSITY
STANDARD
1MB
Inserting 800 gr Max.
Ejecting 1300 gr Max.
HIGH
DENSITY
STANDARD
2MB
DENSITY
*OPT ION*
1.6M B
Media Ejec ting Distance 10 ~ 70 mm
AcousticNoiseat50cm
-at3msStepRate
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 Ma x.
1. Measured with Brikon 723B on Track 00
with 0 ns precompensation on both heads.
HIGH
Both R/W heads must be radially aligned to all tracks
within±0.0200 mm when accessed from either
Radial Alignment
direction.
Measurement is to be made at normal voltage and
normal environmental condition
℃
and 50±5 % RH)
Max.
Azimuth Alignment
(23±2
±0°18′
0 ~ 13 00μs
Index to Data Burst
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 o r less a t Tra ck 00
* Read/Write Compensation : 125ns is recommended
SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPECIFICATION
2.2 Environmental Conditions
ITEM SPECIFICATION
PAGE 6
MODEL
SFD-321B
Ambient
Temperature
Relative
Hum idity (%)
*No-condensation
Vibration
(30 min. swe ep
cycle)
*Exclude
resonant
frequency
Operating (℃) 0
Storage (℃) -40
Transportation (℃) -40
Temperature Gradient
℃
(
/Hr)
Operating : 29
Storage : 40
Transportation : 45
Operating
Transportation : 5 ~ 600 Hz
℃
Max. wet bulb temp. 20
℃
Max. wet bulb temp. 0
℃
5~100Hzfrequencyrange 1.5 G Max.
100~ 200 Hz frequency range 1.0 G Max.
200~ 600 Hz frequency range 0.5 G Max.
frequency range
Operating 20 Max.
Non-operating 30 Max.
Max.
wet bulb temp.
3GMax.
∼
50
∼
70
∼
70
∼
80
∼
90
∼
0
90
Shock (11 ms
half sine wave)
Operating 5GMax.
Transportation 100 G Max.
SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPECIFICATION
2.3 Reliability
ITEM SPECIFICATION
PAGE 7
MODEL
SFD-321B
M.T.B.F.(Mean time between failures)
M.T.T.R.(Meantimetorepair) 30 minutes Max.
Com ponent Life 5years
Disk Life 3×106passes per track or more
Disk Insertion 3×104times or more
Soft Read Error
(*1)
Error Rate
<Note>
Hard Read Error
(*2)
Seek Error
(*3)
20000 power on hours (POH)
(25% duty)
1per109bits read
1per1012bits read
1per106seeks
(*1) A soft (recoverable) e rror is defined as a successful a ttempt 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 o f 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.
SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPECIFICATION
2.4 Power Supply
ITEM SPECIFICATION
PAGE 8
MODEL
SFD-321B
Required Power D.C. 5 V
AllowableRippleVoltage 100 mV
Average Current Average Power
Operating Mode
Typ. Typ.
Stand - by 2mA 10mW
Power
Consumption
Rea d Ope ration 0.3 A 1.5 W
Write Operation 0.3 A 1.5 W
Seek Operation (3 ms) 0.7 A 3.5 W
Drive Motor Start 0.7 A 3.5 W
+5 V (*1)
Current (A)
0.3 A
±
10 %
(including spike noise)
p-p
0.7 A Typ.0.7 A Typ.
18 ms Max.
Seek
2mA
Stand-by
(*2)
500 m s Max.
Spindle motor ON Read /
Write
<Note>
(*1) Typical values are specified at 5.0 V
(*2) Stand-by : Under the condition that all input lines are inactive.
SEMA ELECTRONICS CO.,LTD
PAGE 9
FLOPPY DISK DRIVE SPECIFICATION
MODEL
2.5 Physical Specifications
ITEM SPECIFICATION
Width (mm) 101.6
Mechanical
Dimen sion
Weight (gr) 460.0 typ.
External View Refer to Fig. 2-1 and Fig. 2-2
Installation Holes Refe r to Fig. 2-1 and Fig. 2-2
Height (mm) 25.4
Dep th (mm ) 145.0 (without Front Bezel)
SFD-321B
SEMA ELECTRONICS CO.,LTD
SEMA ELECTRONICS CO.,LTD
SEMA ELECTRONICS CO.,LTD
SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPECIFICATION
4. ELECTRICAL INTERFACE
4.1 Signal Interface
PAGE 13
MODEL
SFD-321B
HOST
CONTROLLER
SYSTEM
Density Select
In Use (Spare)
Drive Select 3 (Spare)
Index
Drive Select 0
Drive Select 1
Drive Select 2 (Spare)
Motor On
Direction Select
Step
Write Data
Write Gate
Track 00
Write Protect
Read Da ta
Side Select
Ready/Disk Change
2
4
6
8
10
12
14
16
SFD-321B(*1)
18
20
22
24
26
28
30
32
34
FDD
<Note>
(*1) All odd numbers : GND
4.2 Power Interface
HOST
CONTROLLER
POWER
SUPPLY
+5 V
+5 V Return (GND)
No Connection (GND)
No Connection
SEMA ELECTRONICS CO.,LTD
1
2
3
4
FDD
SFD-321B
FLOPPY DISK DRIVE SPECIFICATION
4.3 Interface Connectors
4.3.1 Signal Interface Connector
Side Connector
FDD HIROSE P/N 5003-001-7347 or eq uivalent (*1)
HOST (Connector) 3M NO. 7934 or equivalent
HOST (Ca ble) 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
PAGE 14
MODEL
SFD-321B
(*2) Cable length : 1m (3.3 feet) Max.
24 ~ 34
13 ~ 33
PIN NO.3,5,7,9,13,15,17,19,23,25,27,31 : Cut off
PCB
Rear View
FRONT
Top View
< Signal Interface Connector (FDD) > < Cable Side Connector (HOST) >
Fig 4-1. Signal Interface Connector and Cable Side Connector
SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPECIFICATION
4.3.2 Power Interface Connector
Side Connector
FDD ELCO P/N 9251-004-000-809 or equivalent
HOST (Connector) AMP 171822-4 or equivalent
HOST (Ca ble) AWG #20-26
PAGE 15
MODEL
SFD-321B
PCB
4321
Rear View
Top View
< Power Interface Connector (FDD) > < Cable Side Connector (HOST) >
Fig 4-2. Power Interface Connector and Cable Side Connector
SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPECIFICATION
5. SIGNAL CHARACTERISTICS
5.1 Signal Level
Signal Log ic Input Level Output Level (*1)
Low (True) 0.9 V Max. 0.4 V Max.
High (False ) 2.2 V Min. 2.4 V Min.
<Note>
(*1) "LOW" level Max. sink current is 48 mA.
5.2 Recommended Interface Circuit
PAGE 16
MODEL
SFD-321B
HOST SIDE
7438 SERIES
CMOS OR
EQUIVALENT
74LS14
74HC14 OR
EQUIVALENT
Vdd
150
(1
(1
Ω∼
㏀
is recommended)
2.2
㏀
㏀
)
FDD SIDE
Vdd
CMOS
(SCHMITT TRIGGER INPUT)
INPUT
OUTPUT
OPEN DRAIN
FRAME GND
SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPECIFICATION
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
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
or Low density by checking the signal coming from mechanical switch which
detects the density selecting hole on the media.
Ω
resistor onto "OPA" short plug when the High density media
Type Contents
PAGE 17
MODEL
SFD-321B
2Mode
(2.0 / 1.0MB)
(Non-connection of "OPA")
3Mode
(2.0 / 1.6 / 1.0MB)
(Connection of "OPA")
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.
Automatic Switching
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".
1.0MB : If Low density media is inserted
"Density Select" is not available.
SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPECIFICATION
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
sign al change s to "L OW".
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.
PAGE 18
MODEL
SFD-321B
5.3.5 Step
This is a control signal to move the R/W head, and the head starts
moving attherisingedgeoftheStepsignal.
3msMin.
㎲
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.
Ta±0.5 % Tb±0.5 %
Tc±0.5 %
0.15 ~ 1.1
Tw
㎲
Density Mode
Density Transfer Rate
Ta (㎲)
(Typ.)
Tb (㎲)
(Typ.)
Tc (㎲)
(Typ.)
1.0MB 250 kbps 4 6 8
1.6MB 500 kbps 2 3 4
2.0MB 500 kbps 2 3 4
SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPECIFICATION
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
se ek operation is completed.
When this signal changes to "HIGH" level, the read or seek op eration
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
PAGE 19
MODEL
SFD-321B
WRITE GATE
SIDE SELECT
READ DATA
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∼8ms
100㎲Min.
100㎲Min.
valid valid
valid
650
650
㎲
㎲
Min.
Min
100
valid
㎲
Min.
200±3ms
±
(166.7
2.5 ms)(*1)
<Note>
(*1) The value in parenthsis is for 360 rpm (1.6MB Mode) rotation speed.
SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPECIFICATION
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 ho st system
in the same form as it was received on the Write Data line. Each flux
reversal sensed on the d isk 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.
PAGE 20
MODEL
SFD-321B
±
Ta
0.5 %
Density Mode
Density Transfer Rate
Tb
±
0.5 %
Ta (㎲)
(Typ.)
±
Tc
Tb (㎲)
(Typ.)
0.5 %
400 ns±20 %
Tc (㎲)
(Typ.)
1.0MB 250 kbps 4 6 8
1.6MB 500 kbps 2 3 4
2.0MB 500 kbps 2 3 4
SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPECIFICATION
5.4.5 Disk Change / Ready
By selecting p roper trace plugs, this signal line (pin # 34) can be used for
Ready or Disk Change line.
-. Ready
This line becomes a ctive "LOW" when the drive is selected, a disk is
clampedandthespindlemotorisuptospeed.
(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 d rive is selected.
PAGE 21
MODEL
SFD-321B
DRIVE SE LECT
DIS K IN
STEP
DIS K
CHANGE
inserted
ejected
0.5㎲Max
0.5
㎲
Max
SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPECIFICATION
6. TIMING DIAGRAM
6.1 Seek Operation Timing
DRIVE SELECT
PAGE 22
MODEL
SFD-321B
DIRECTION
SELECT
500㎱Min.
STEP
3㎳Min.
TRACK 00
1
6.2 Read / Write Operation Timing
MOTOR ON
600㎳Max.
DRIVE S ELECT
READY
REVERSE
㎲
Min.
18㎳Min. (*1)
2.8㎳Max.
FORWARD
㎲
1
Min.
10㎲Max.
650㎲Min.
650㎲Min.
㎲
1
Min.
0.3㎳Max.
STEP
DENS ITY
SELECT
READ DAT A
WRITE GATE
WRITE DAT A
18 ms Min.
0Min.
18 m s Min.
0Min.
100㎲Min. (*3)
100㎲Min (*3)
8㎲Max.
(*2)
(*2)
8㎲Max.
<Note>
(*1) Turn Around Time is 18 ms Min. when Direction is changed.
(*2) 750㎲Min. ( including 100
(*3) When spindle motor speed is changed (300 rpm
㎲
Side Se lec t timing )
↔
360 rpm )
this value is 500 m s Min.
(*2)
100㎲Min. (*3)
SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPECIFICATION
7. SAFETY STANDARDS
This drive is appro ve d by the followin g s ;
.CE
.CSA
.UL
.TUV
.MIC
. BSMI
.FCC
PAGE 23
MODEL
SFD-321B
SAMSUNG ELECTRO-MECHANICS CO.,LTD.
SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPECIFICATION
8. PACKAGING DESCRIPTION
8.1 Label Description
8.1.1 Serial Number Label Marking
BAR CODE
FBT6 S1ARB00001
①
Product name : "F"
②
Model name : "B"
③
Revision name (Major)
④
Revision name (Minor)
⑤
Production division : "S"
⑥
Production site
→
FDD
→
SFD-321B
→
FBT6 S1ALB00001
①②③④ ⑤⑥⑦⑧⑨⑩
SEMA ELECTRONICS CO.,LTD
PAGE 24
MODEL
SFD-321B
Marking
Production site
⑦
Production line : "A"
⑧
Year of manufacturing
Year 2001 2002 2003 2004 2005 2006 2007
Marking M N P Q R S T
⑨
Month of manufacturing
Month Marking Month Marking Month Marking Month Marking
1 1 4 4 7 7 10 A
2 2 5 5 8 8 11 B
3 3 6 6 9 9 12 C
⑩
Consecutive nu mber
8.1.2 Label Description
1 2
China factory
(SEMA China)
→
A-Line, "B" ~ "Z"
FBT6 S1R1100001
Outside supplier
(OEM)
Bar co de
①
REV. T6
②
①
Serial number
②
Revision
③
Buy er na me
④
Production site
⑤
CE m a rking
③
SFD-321B /
⑥
⑦
⑧
⑨
⑩
⑪
****
DC5V 0 .7V
CSA ma rking
UL ma rking
TUV mark ing
MIC marking (for only domestic)
BSMI ma rk in g
Label manufacturer identification
SEMA ELECTRONICS CO.,LTD
MA DE IN CHINA
⑩⑨⑧⑦⑥⑤
④
⑪
SEMA ELECTRONICS CO.,LTD
SEMA ELECTRONICS CO.,LTD
PAGE 27
FLOPPY DISK DRIVE SPECIFICATION
MODEL
9. OPTION SELECTION
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 p roper trace, FDD ca n be used for the
following different functions.
Trace Name Description
SFD-321B
DS0
DS1
DC
RDY
OPA
OPB (*1)
<Note>
(*1) Both "OPA" and "OPB" op en : 2 Mode (1MB / 2MB)
"OPB" is connecte d and "OPA" is open : 2 Mo de (1MB / 1.6MB)
"OPA" is connecte d and "OPB" is open : 3 Mo de (1MB / 1.6MB / 2MB)
Activate Drive Select 0 line
Activate Drive Select 1 line
Activate Disk Change Signal
Activate Ready Signal
For 3 Mode usage
For 1.6MB usage
SEMA ELECTRONICS CO.,LTD
PAGE 28
FLOPPY DISK DRIVE SPECIFICATION
MODEL
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
SFD-321B
□
□
9.2.2 The Selection of Bezel Type
□
□
9.2.3 The Color of Bezel, Button
□
□
□
Color Number (Fill in this blank)
9.2.4 The Selection of LED Color
2Mode(1MB/2MB)
3 Mode (1MB / 1.6MB / 2MB)
With Bezel
Without Bezel
Black
Ivory
Gray
□
□
□
Green
Red
Amber
SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPECIFICATION
11. GENERAL COMMENT
PAGE 29
MODEL
SFD-321B
SEMA ELECTRONICS CO.,LTD
SEMA ELECTRONICS CO.,LTD
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