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.
FLOPPY DISK DRIVE SPECIFICATION PAGE 1 MODEL SFD-321B CONTENTS 1. INTRODUCTION 1.1 Application 1.2 Disk Used 2. GENERAL SPECIFICATIONS 2.1 2.2 2.3 2.4 2.5 Performance Environmental Conditions Reliability Power Supply Physical Specifications 3. INSTALLATION 4. ELECTRICAL INTERFACE 4.1 Signal Interface 4.2 Power Interface 4.3 Interface Connectors 5. SIGNAL CHARACTERISTICS 5.1 5.2 5.3 5.4 Signal Level Recommended Interface Circuit Input Signals Output Signals 6. TIMING DIAGRAM 6.
FLOPPY DISK DRIVE SPECIFICATION PAGE 2 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.
FLOPPY DISK DRIVE SPECIFICATION PAGE 3 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.
FLOPPY DISK DRIVE SPECIFICATION PAGE 4 MODEL SFD-321B 2. GENERAL SPECIFICATIONS 2.1 Performance LOW DENSITY STANDARD 1MB HIGH DENSITY STANDARD 2MB HIGH DENSITY *OPTION* 1.6MB Per Disk 1000 2000 1600 Per Track 6.25 12.5 10.0 655.4 (16) 1310.7 (32) 1065.0 (26) 737.3 (9) 1474.6 (18) 1228.8 (15) 819.2 (5) 1638.4 (10) 1310.
FLOPPY DISK DRIVE SPECIFICATION LOW DENSITY STANDARD 1MB I T E M Media Operating Force PAGE 5 MODEL SFD-321B HIGH DENSITY STANDARD 2MB Inserting 800 gr Max. Ejecting 1300 gr Max. Media Ejecting Distance 10 ~ 70 mm Acoustic Noise at 50 cm - at 3 ms Step Rate 50 dBA Max. Read Bit Shift 1300 ns Max. HIGH DENSITY *OPTION* 1.6MB 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.
FLOPPY DISK DRIVE SPECIFICATION PAGE 6 MODEL SFD-321B 2.2 Environmental Conditions ITEM SPECIFICATION Operating (℃) Ambient Temperature 0 ∼ 50 Storage (℃ ) -40 ∼ 70 Transportation (℃ ) -40 ∼ 70 Temperature Gradient (℃ / Hr) Operating 20 Max. Non-operating 30 Max. Operating : 29 ℃ Max. wet bulb temp. Relative Humidity (%) *No-condensation Vibration (30 min. sweep cycle) *Exclude resonant frequency Shock (11 ms half sine wave) Storage 20 ∼ 80 : 40 ℃ Max. wet bulb temp.
FLOPPY DISK DRIVE SPECIFICATION PAGE 7 MODEL SFD-321B 2.3 Reliability I T E M SPECIFICATION M.T.B.F.(Mean time between failures) 20000 power on hours (POH) (25% duty) M.T.T.R.(Mean time to repair) 30 minutes Max.
FLOPPY DISK DRIVE SPECIFICATION PAGE 8 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 Average Power Typ. Typ. Stand - by 2 mA 10mW Read Operation 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 Operating Mode Power Consumption +5 V (*1) 0.7 A Typ. 0.7 A Typ. Current (A) 0.3 A 18 ms Max. 500 ms Max.
FLOPPY DISK DRIVE SPECIFICATION PAGE 9 MODEL SFD-321B 2.5 Physical Specifications I T E M Mechanical Dimension SPECIFICATION Width (mm) 101.6 Height (mm) 25.4 Depth (mm) Weight (gr) 145.0 (without Front Bezel) 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.
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FLOPPY DISK DRIVE SPECIFICATION PAGE 13 MODEL SFD-321B 4. ELECTRICAL INTERFACE 4.1 Signal Interface Density Select In Use (Spare) Drive Select 3 (Spare) Index Drive Select 0 Drive Select 1 Drive Select 2 (Spare) HOST CONTROLLER SYSTEM Motor On Direction Select Step Write Data Write Gate Track 00 Write Protect Read Data Side Select Ready/Disk Change 2 4 6 8 10 12 14 FDD 16 SFD-321B(*1) 18 20 22 24 26 28 30 32 34 (*1) All odd numbers : GND 4.
FLOPPY DISK DRIVE SPECIFICATION PAGE 14 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. 2 4 ~ 34 1 3 ~ 33 PCB PIN NO.
FLOPPY DISK DRIVE SPECIFICATION PAGE 15 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 PCB 4 3 2 1 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.
FLOPPY DISK DRIVE SPECIFICATION PAGE 16 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 EQUIVALENT (1 ㏀ ) CMOS (SCHMITT TRIGGER INPUT) INPUT Vdd 150 Ω∼ 2.
FLOPPY DISK DRIVE SPECIFICATION PAGE 17 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.
FLOPPY DISK DRIVE SPECIFICATION PAGE 18 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.
FLOPPY DISK DRIVE SPECIFICATION PAGE 19 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.
FLOPPY DISK DRIVE SPECIFICATION PAGE 20 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.
FLOPPY DISK DRIVE SPECIFICATION 5.4.5 PAGE 21 MODEL SFD-321B 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. -.
FLOPPY DISK DRIVE SPECIFICATION PAGE 22 MODEL SFD-321B 6. TIMING DIAGRAM 6.1 Seek Operation Timing DRIVE SELECT DIRECTION SELECT FORWARD REVERSE 500 ㎱ Min. 1 ㎲ 1 ㎲ Min. 18 ㎳ Min. (*1) Min. STEP 1 ㎲ 3 ㎳ Min. 2.8 ㎳ Max. 10 ㎲ Max. Min. TRACK 00 6.2 Read / Write Operation Timing 650 ㎲ Min. MOTOR ON 650 ㎲ Min. 600 ㎳ Max. DRIVE SELECT 0.3 ㎳ Max. READY STEP (*2) DENSITY SELECT READ DATA 18 ms Min. 100 ㎲ Min. (*3) 0 Min. 18 ms Min. 100 ㎲ Min (*3) 100 ㎲ Min. (*3) (*2) (*2) WRITE GATE 0 Min.
FLOPPY DISK DRIVE SPECIFICATION PAGE 23 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.
FLOPPY DISK DRIVE SPECIFICATION PAGE 24 MODEL SFD-321B 8. PACKAGING DESCRIPTION 8.1 Label Description 8.1.1 Serial Number Label Marking BAR CODE FBT6 ① ② ③ ④ ⑤ ⑥ S1ARB00001 F ① B ② T ③ 6 ④ S ⑤ 1 ⑥ A ⑦ L ⑧ B 00001 ⑨ ⑩ Product name : "F" → FDD Model name : "B" → SFD-321B Revision name (Major) Revision name (Minor) Production division : "S" → SEMA ELECTRONICS CO.
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FLOPPY DISK DRIVE SPECIFICATION PAGE 27 MODEL SFD-321B 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 proper trace, FDD can be used for the following different functions.
FLOPPY DISK DRIVE SPECIFICATION PAGE 28 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.
FLOPPY DISK DRIVE SPECIFICATION PAGE 29 MODEL SFD-321B 11. GENERAL COMMENT SEMA ELECTRONICS CO.
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