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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 1 FLOPPY DISK DRIVE SPECIFICATION MODEL SFD-321B 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 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 Signals 5.4 Output Signals 6. TIMING DIAGRAM 6.1 Seek Operation Ti
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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
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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. SEMA ELECTRONICS CO.,LTD
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PAGE 4 FLOPPY DISK DRIVE SPECIFICATION MODEL SFD-321B 2. GENERAL SPECIFICATIONS 2.1 Performance LOW HIGH HIGH DENSITY DENSITY DENSITY IT E M STANDARD STANDARD *OPTION* 1MB 2MB 1.6MB Per Disk 1000 2000 1600 Unformatted Per Track 6.25 12.5 10.0 Capacity 655.4 (16) 1310.7 (32) 1065.0 (26) (KBytes) Per Disk Formatted 737.3 (9) 1474.6 (18) 1228.8 (15) (Sector / Track) 819.2 (5) 1638.4 (10) 1310.7 (8) Recording Density (BPI) 8,717 17,434 14,528 -Inner Most Track, side 1 Data Transfer Rate (KBits / sec
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PAGE 5 FLOPPY DISK DRIVE SPECIFICATION MODEL SFD-321B LOW HIGH HIGH DENSITY DENSITY DENSITY IT E M STANDARD STANDARD *OPTION* 1MB 2MB 1.6MB Inserting 800 gr Max. Media Operating Force Ejecting 1300 gr Max. Media Ejecting Distance 10 ~ 70 mm Acoustic Noiseat50cm 50 dBA Max. -at3msStepRate 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 prec
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PAGE 6 FLOPPY DISK DRIVE SPECIFICATION MODEL SFD-321B 2.2 Environmental Conditions ITEM SPECIFICATION ℃ ∼ Operating ( ) 0 50 ℃ ∼ Storage ( ) -40 70 Ambient Transportation ( ℃) -40 ∼ 70 Temperature Operating 20 Max. Temperature Gradient ( ℃/Hr) Non-operating 30 Max. Operating : 29 ℃ Max. wet bulb temp. 20 ∼ 80 Relative Storage : 40 ℃ Max. wet bulb temp. 0 ∼ 90 Humidity (%) *No-condensation ℃ Transportation : 45 Max. 0 ∼ 90 wet bulb temp. 5~ 100Hzfrequencyrange 1.5 G Max. Vibration (30 min. sweep
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PAGE 7 FLOPPY DISK DRIVE SPECIFICATION MODEL SFD-321B 2.3 Reliability ITE M SPECIFICATION 20000 power on hours (POH) M.T.B.F.(Mean time between failures) (25% duty) M.T.T.R.(Meantimeto repair) 30 minutes Max. Component Life 5years 6 × Disk Life 3 10 passes per track or more 4 Disk Insertion 3 ×10 times or more Soft Read Error 9 1per10 bits read (*1) Hard Read Error 12 Error Rate 1per10 bits read (*2) Seek Error 6 1per10 seeks (*3) (*1) A soft (recoverable) error is defined as a successful
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PAGE 8 FLOPPY DISK DRIVE SPECIFICATION MODEL SFD-321B 2.4 Power Supply ITE M SPECIFICATION ± Required Power D.C. 5 V 10 % AllowableRippleVoltage 100 mVp-p (including spike noise) Average Current Average Power Operating Mode Typ. Typ. Stand - by 2mA 10mW Power Read Operation 0.3 A 1.5 W Consumption 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) 0.7 A Typ. 0.7 A Typ. Current (A) 0.3 A 500 ms Max. 18 ms Max. 2mA Stand-by Spindle motor ON Read /
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PAGE 9 FLOPPY DISK DRIVE SPECIFICATION MODEL SFD-321B 2.5 Physical Specifications ITE M SPECIFICATION Width (mm) 101.6 Mechanical Height (mm) 25.4 Dimension Depth (mm) 145.0 (without Front Bezel) Weight (gr) 460.0 typ. External View Refer to Fig. 2-1 and Fig. 2-2 Installation Holes Refer to Fig. 2-1 and Fig. 2-2 SEMA ELECTRONICS CO.,LTD
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SEMA ELECTRONICS CO.,LTD
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SEMA ELECTRONICS CO.,LTD
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SEMA ELECTRONICS CO.,LTD
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PAGE 13 FLOPPY DISK DRIVE SPECIFICATION MODEL SFD-321B 4. ELECTRICAL INTERFACE 4.1 Signal Interface Density Select 2 In Use (Spare) 4 Drive Select 3 (Spare) 6 Index 8 Drive Select 0 10 Drive Select 1 12 Drive Select 2 (Spare) 14 HOST FDD Motor On 16 CONTROLLER SFD-321B(*1) Direction Select 18 SYSTEM Step 20 Write Data 22 Write Gate 24 Track 00 26 Write Protect 28 Read Data 30 Side Select 32 Ready/Disk Change 34 (*1) All odd numbers : GND 4.2 Power Interface +5 V 1 HOST +5 V Return (GND) 2
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PAGE 14 FLOPPY DISK DRIVE SPECIFICATION MODEL SFD-321B 4.3 Interface Connectors 4.3.1 Signal Interface Connector Side Connector FDD HIROSE P/N 5003-001-7347 or equivalent (*1) HOST (Connector) 3M NO. 7934 or equivalent HOST (Cable) 3M 3365/34 or equivalent (*2) (*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. 24 ~ 34 PCB 13 ~ 33 PIN NO.3,5,7,9,13,15,17,19,23,25,27,31 : Cut off Rear View FRONT Top View < Signal Inter
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PAGE 15 FLOPPY DISK DRIVE SPECIFICATION MODEL SFD-321B 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 (Cable) AWG #20-26 43 21 PCB 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
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PAGE 16 FLOPPY DISK DRIVE SPECIFICATION MODEL SFD-321B 5. SIGNAL CHARACTERISTICS 5.1 Signal Level Signal Logic 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. (*1) "LOW" level Max. sink current is 48 mA. 5.2 Recommended Interface Circuit HOST SIDE FDD SIDE Vdd 7438 SERIES CMOS OR CMOS (1 ㏀ ) EQUIVALENT (SCHMITT TRIGGER INPUT) INPUT Vdd 150 Ω∼2.2 ㏀ ㏀ (1 is recommended) OUTPUT 74LS14 OPEN DRAIN 74HC14 OR EQUIVALENT FRAME GND SEMA ELECTRON
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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 attaching 0 Ω resistor onto "OPA" short plug when the High density media 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
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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 d
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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 W
