Samsung Computer Drive SFD 321B User Manual

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  
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  
SEMA ELECTRONICS CO.,LTD  
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.  
SEMA ELECTRONICS CO.,LTD  
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.  
SEMA ELECTRONICS CO.,LTD  
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.  
SEMA ELECTRONICS CO.,LTD  
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.  
SEMA ELECTRONICS CO.,LTD  
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  
SEMA ELECTRONICS CO.,LTD  
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SEMA ELECTRONICS CO.,LTD  
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  
SEMA ELECTRONICS CO.,LTD  
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  
SEMA ELECTRONICS CO.,LTD  
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  
SEMA ELECTRONICS CO.,LTD  
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  
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.  
SEMA ELECTRONICS CO.,LTD  
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.  
SEMA ELECTRONICS CO.,LTD  
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.  
SEMA ELECTRONICS CO.,LTD  
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
T
6
S
1
A
L
B
00001  
FBT6  
S1ARB00001  
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  
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  
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
Consecutive number  
8.1.2 Label Description  
Bar code  
FBT6  
S1R1100001  
REV. T6  
****  
SFD-321B /  
DC5V 0.7V MADE IN CHINA  
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  
SEMA ELECTRONICS CO.,LTD  
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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  
SEMA ELECTRONICS CO.,LTD  

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