SFD-321B SAMSUNG | Alldatasheet
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Technical content
Datasheet sections
- 1.1 Application
- 1.2 Disk Used
- 2.1 Performance
- 2.2 Environmental Conditions
- 2.3 Reliability
- 2.4 Power Supply
- 2.5 Physical Specifications
- 4.1 Signal Interface
- 4.2 Power Interface
- 4.3 Interface Connectors
- 5.1 Signal Level
- 5.2 Recommended Interface Circuit
- 5.3 Input Signals
- 5.4 Output Signals
- 6.1 Seek Operation Timing
- 6.2 Read / Write Operation Timing
SEMA ELECTRONICS CO.,LTD 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 FDD
SEMA ELECTRONICS CO.,LTD 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
- OPTION SELECTION
9.1 Trace Options
9.2 Other Options (Buyer Selection)
- 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 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.,LTD FLOPPY DISK DRIVE SPECIFICATION PAGE 4 MODEL SFD-321B 2. GENERAL SPECIFICATIONS
2.1 Performance
*OPTION* 1.6MB Capacity (KBytes) Unformatted Per Disk 1000 2000 1600 Per Track 6.25 12.5 10.0 Formatted Per Disk (Sector / Track) Recording Density (BPI) -Inner Most Track, side 1 8,717 17,434 14,528 Data Transfer Rate (KBits / sec) -MFM recording 250 500 Number of Heads 2 Number of Tracks 160 Track Density (TPI) 135TPI (5.33 Tracks / mm) Drive Motor Specification Rotational Speed 300 RPM 360 RPM LSV ± 1.5 % Max. ISV ± 1.5 % Max. Start Time 500 ms Max. Access Time Track to Track Time 3m s Head Settling Time 15 ms Max. Head 0 / Head 1 Offset Head 1 is displaced 8 tracks toward the drive spindle direction.
SEMA ELECTRONICS CO.,LTD FLOPPY DISK DRIVE SPECIFICATION PAGE 5 MODEL SFD-321B * Read/Write Compensation : 125ns is recommended ITEM LOW DENSITY STANDARD 1MB HIGH DENSITY STANDARD 2MB HIGH DENSITY *OPTION* 1.6MB Media Operating Force Inserting 800 gr Max. Ejecting 1300 gr Max. Media Ejecting Distance 10 ~ 70 mm A c o u s t i cN o i s ea t5 0c m -a t3m sS t e pR a t e 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. Radial Alignment Both R/W heads must be radially aligned to all tracks within ±0.0200 mm when accessed from either direction. Measurement is to be made at normal voltage and normal environmental condition Azimuth Alignment ±0 °18′Max. Index to Data Burst 0 ~ 1300 μs 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
SEMA ELECTRONICS CO.,LTD FLOPPY DISK DRIVE SPECIFICATION PAGE 6 MODEL SFD-321B
2.2 Environmental Conditions
Operating (℃) 0 ∼ 50 Storage (℃) -40 ∼ 70 Transportation (℃) -40 ∼ 70 Temperature Gradient ℃ /H r ) Operating 20 Max. Non-operating 30 Max. Relative Humidity (%) *No-condensation Operating : 29 ℃ Max. wet bulb temp. 20 ∼ 80 Storage : 40 ℃ Max. wet bulb temp. 0 ∼ 90 Transportation : 45 ℃ Max. wet bulb temp. 0 ∼ 90 Vibration (30 min. sweep cycle) *Exclude resonant frequency Operating 5~1 0 0H zf r e q u e n c yr a n g e1.5 G Max. 100~ 200 Hz frequency range 1.0 G Max. 200~ 600 Hz frequency range 0.5 G Max. Transportation : 5 ~ 600 Hz frequency range 3G M a x . Shock (11 ms half sine wave) Operating 5G M a x . Transportation 100 G Max.
SEMA ELECTRONICS CO.,LTD FLOPPY DISK DRIVE SPECIFICATION PAGE 7 MODEL SFD-321B
2.3 Reliability
<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. ITEM SPECIFICATION M.T.B.F.(Mean time between failures) 20000 power on hours (POH) (25% duty) Component Life 5y e a r s Disk Life 3×10 passes per track or more Disk Insertion 3×10 times or more Error Rate Soft Read Error (*1) 1p e r1 0 bits read Hard Read Error (*2) 1p e r1 0 bits read Seek Error (*3) 1p e r1 0 seeks
SEMA ELECTRONICS CO.,LTD FLOPPY DISK DRIVE SPECIFICATION PAGE 8 MODEL SFD-321B
2.4 Power Supply
<Note> (*1) Typical values are specified at 5.0 V (*2) Stand-by : Under the condition that all input lines are inactive. ITEM SPECIFICATION Required Power D.C. 5 V ± 10 % A l l o w a b l eR i p p l eV o l t a g e100 mVp-p (including spike noise) Power Consumption Operating Mode Average Current Average Power Typ. Typ. Stand - by 2m A 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 0.7 A Typ.0.7 A Typ. 500 ms Max. +5 V (*1) Current (A) 2m A 18 ms Max. 0.3 A Stand-by (*2) Spindle motor ON Read / Write Seek
SEMA ELECTRONICS CO.,LTD FLOPPY DISK DRIVE SPECIFICATION PAGE 9 MODEL SFD-321B
2.5 Physical Specifications
Width (mm) 101.6 Height (mm) 25.4 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
SEMA ELECTRONICS CO.,LTD
SEMA ELECTRONICS CO.,LTD
SEMA ELECTRONICS CO.,LTD FLOPPY DISK DRIVE SPECIFICATION PAGE 13 MODEL SFD-321B 4. ELECTRICAL INTERFACE
4.1 Signal Interface
<Note> (*1) All odd numbers : GND
4.2 Power Interface
In Use (Spare) Drive Select 3 (Spare) Index Drive Select 0 Drive Select 2 (Spare) Drive Select 1 Motor On Direction Select Step Write Data Write Gate Track 00 Write Protect Read Data Side Select Ready/Disk Change 34 HOST CONTROLLER SYSTEM FDD SFD-321B(*1) +5 V +5 V Return (GND) No Connection (GND) No Connection FDD SFD-321B HOST CONTROLLER POWER SUPPLY
SEMA ELECTRONICS CO.,LTD FLOPPY DISK DRIVE SPECIFICATION PAGE 14 MODEL SFD-321B
4.3 Interface Connectors
4.3.1 Signal Interface Connector
<Note> Wall Type (*2) Cable length : 1m (3.3 feet) Max. < Signal Interface Connector (FDD) > < Cable Side Connector (HOST) > Fig 4-1. Signal Interface Connector and Cable Side 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) Rear View 24 ~ 3 4 13 ~ 3 3 PCB Top View FRONT
SEMA ELECTRONICS CO.,LTD FLOPPY DISK DRIVE SPECIFICATION PAGE 15 MODEL SFD-321B
4.3.2 Power Interface Connector
< Power Interface Connector (FDD) > < Cable Side Connector (HOST) > Fig 4-2. Power Interface Connector and Cable Side 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 4321 Rear View Top View PCB
SEMA ELECTRONICS CO.,LTD FLOPPY DISK DRIVE SPECIFICATION PAGE 16 MODEL SFD-321B 5. SIGNAL CHARACTERISTICS
5.1 Signal Level
<Note> (*1) "LOW" level Max. sink current is 48 mA.
5.2 Recommended Interface Circuit
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. FRAME GND OUTPUT OPEN DRAIN CMOS (SCHMITT TRIGGER INPUT) INPUT 150 Ω∼2.2 ㏀ (1 ㏀ is recommended) Vdd Vdd
7438 SERIES
(1 ㏀ ) HOST SIDE
SEMA ELECTRONICS CO.,LTD 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. 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.
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. Type Contents 2M o d e (2.0 / 1.0MB) (Non-connection of "OPA") Automatic Switching 2.0MB : If High density media is inserted. 1.0MB : If Low density media is inserted. 3M o d e (Connection of "OPA") 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 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. "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 m o v i n ga tt h er i s i n ge d g eo ft h eS t e ps i g n a l .
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. 3m sM i n . 0.15 ㎲ Min. 0.15 ~ 1.1 ㎲ Tw Density Mode Ta ( ㎲) (Typ.) Tb ( ㎲) (Typ.) Tc ( ㎲) (Typ.)Density Transfer Rate 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 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. Logical "HIGH" level : the lower side (side 0) of Heads "LOW " level : the upper side (side 1) of Heads
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. <Note> (*1) The value in parenthsis is for 360 rpm (1.6MB Mode) rotation speed. 100 ㎲ Min. 650 ㎲ Min. 100 ㎲ Min.100 ㎲ Min. 650 ㎲ Min validvalid valid valid WRITE GATE SIDE SELECT READ DATA 1∼8m s 200±3m s (166.7±2.5 ms)(*1)
SEMA ELECTRONICS CO.,LTD 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.
5.4.4 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. Density Mode Ta ( ㎲) (Typ.) Tb ( ㎲) (Typ.) Tc ( ㎲) (Typ.)Density Transfer Rate 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 PAGE 21 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 c l a m p e da n dt h es p i n d l em o t o ri su pt os p e e d . (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. 0.5 ㎲ Max 0.5 ㎲ Max inserted ejected DRIVE SELECT DISK IN STEP DISK CHANGE
SEMA ELECTRONICS CO.,LTD FLOPPY DISK DRIVE SPECIFICATION PAGE 22 MODEL SFD-321B 6. TIMING DIAGRAM
6.1 Seek Operation Timing
6.2 Read / Write Operation Timing
1 ㎲ Min. 1 ㎲ Min. 1 ㎲ Min. 10 ㎲ Max. 2.8 ㎳ Max. 18 ㎳ Min. (*1) 500 ㎱ Min. 3 ㎳ Min. DRIVE SELECT DIRECTION SELECT STEP TRACK 00 <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 ↔ 360 rpm) this value is 500 ms Min. 650 ㎲ Min. 650 ㎲ Min. 0.3 ㎳ Max. 600 ㎳ Max. (*2) MOTOR ON DRIVE SELECT READY STEP READ DATA WRITE GATE WRITE DATA DENSITY SELECT 100 ㎲ Min. (*3) (*2) 100 ㎲ Min. (*3) 100 ㎲ Min (*3) 18 ms Min. 0M i n . 18 ms Min. 0M i n . 8 ㎲ Max. (*2) 8 ㎲ Max.
SEMA ELECTRONICS CO.,LTD FLOPPY DISK DRIVE SPECIFICATION PAGE 23 MODEL SFD-321B 7. SAFETY STANDARDS This drive is approved by the followings; .C E .C S A .U L .T U V .M I C . BSMI .F C C SAMSUNG ELECTRO-MECHANICS CO.,LTD.
SEMA ELECTRONICS CO.,LTD FLOPPY DISK DRIVE SPECIFICATION PAGE 24 MODEL SFD-321B 8. PACKAGING DESCRIPTION
8.1.1 Serial Number Label Marking
①② ③ ④ ⑤ ⑥ ⑦ ⑧⑨⑩ ① Product name : "F" → FDD ② Model name : "B" → SFD-321B ③ Revision name (Major) ④ Revision name (Minor) ⑤ Production division : "S" → SEMA ELECTRONICS CO.,LTD ⑥ Production site ⑦ Production line : "A" → A-Line, "B" ~ "Z" ⑧ Year of manufacturing ⑨ Month of manufacturing ⑩ Consecutive number
8.1.2 Label Description
Production site China factory (SEMA China) Outside supplier (OEM) Year 2001 2002 2003 2004 2005 2006 2007 Marking M N P Q R S T 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 Bar code SFD-321B / DC5V 0.7V ⑩⑨⑧⑦⑥⑤ REV. T6② ****③ MADE IN CHINA ④ FBT6 S1R1100001 ① ① Serial number ② Revision ③ Buyer name ④ Production site ⑤ CE marking ⑥ CSA marking ⑦ UL marking ⑧ TUV marking ⑨ MIC marking (for only domestic) ⑩ BSMI marking ⑪ Label manufacturer identification
SEMA ELECTRONICS CO.,LTD
SEMA ELECTRONICS CO.,LTD
SEMA ELECTRONICS CO.,LTD 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. By putting a chip-resistor onto a proper trace, FDD can be used for the following different functions. Trace Name Description DS0 DS1 Activate Drive Select 0 line Activate Drive Select 1 line DC RDY Activate Disk Change Signal Activate Ready Signal OPA OPB (*1) For 3 Mode usage For 1.6MB usage <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)
SEMA ELECTRONICS CO.,LTD FLOPPY DISK DRIVE SPECIFICATION PAGE 28 MODEL SFD-321B 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
9.2.2 The Selection of Bezel Type
9.2.3 The Color of Bezel, Button
9.2.4 The Selection of LED Color
□ 2M o d e( 1 M B/2 M B ) □ 3 Mode (1MB / 1.6MB / 2MB) □ With Bezel □ Without Bezel □ Black □ Ivory □ Gray Color Number (Fill in this blank) □ Green □ Red □ Amber
SEMA ELECTRONICS CO.,LTD FLOPPY DISK DRIVE SPECIFICATION PAGE 29 MODEL SFD-321B 11. GENERAL COMMENT
SEMA ELECTRONICS CO.,LTD