Samsung SFD-321B FLOPPY DISK DRIVE SPECIFICATION

SEMA ELECTRONICS CO.,LTD

FLOPPY DISK DRIVE SPECIFICATION

PAGE 27

MODEL SFD-321B

FDD can be modified for differentfunctions 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 d ifferent fu nctions.

Trace Nam e Description

DS0

DS1

Activate Driv e Select 0 line

Activate Driv e Select 1 line

RDY

Activate Disk Change Signal

Activate Re ady Signa l

OPA

OPB (*1)

For 3 M ode us age

For 1.6M B usage

<Note>

(*1) Both "OPA" an d "OPB" open : 2 Mode (1MB / 2M B)

"OPB" is co nnecte d and "OP A" is open : 2 M ode (1MB / 1.6MB)

"OPA" is co nnecte d and "OP B" is open : 3 M ode (1MB / 1.6MB / 2M B)

Contents

Main OEM MANUAL SFD-321B 3.5inch DUAL DENSITY MICRO FLOPPY DISK DRIVE SPECIFICATIONS FDD Page FLOPPY DISK DRIVE SPECIFI CATION 1. INTRODUCTION PAGE 4 MODEL SFD-321B 2. GENERAL SPECIFICATIONS 2.1 Performance FLOPPY DISK DRIVE SPE CIFICATION * Read/Writ e Compensation : 125ns i s recommended 2.2 Environmental Condi tions 2.3 Reliability 2.4 Power Supply 2.5 Physical Specifi cations Page Page Page 4. ELECTRICAL INTERFACE 4.1 Signal Interface 4.2 Power Int erface FLOPPY DISK DRIVE SPECI FICATION 4.3 Interface Connectors Page 5. SIGNAL CHARACTERISTICS 5.1 Signal Level 5.2 Recommended Interface Circuit 5.3 Input Signals Page 5.4 Output Signals Page Page FLOPPY DISK DRIVE SPECIFICATION PAGE 22 MODEL SFD-321B 6.2 Read / Write Operation Timing 6. TIMING DIAGRAM 6.1 Seek Operation Timing FLOPPY DISK DRIVE SPECIFICATION 7. SAFETY STANDARDS SAMSUNG ELECTRO-MECHANICS CO.,LTD. FLOPPY DISK DRIVE SPECI FICATION 8. PACKAGING DESCRIPTION 8.1 Label Descript ion Page Page FLOPPY DISK DRIVE SPECIFICATION 9. OPTION SELECTION 9.1 Trace Options 9.2 Other Options (Buyer Sel ection)