Siemens 100-8D User manual

SIEMENS

SIEMENS
Floppy Disk Drive FDD 100-8
INTRODUCTION
OPERATION
THEORY OF OPERATION
INSTALLATION
Technical Manual
Volume 1 Model 100-8D

TABLE OF CONTENTS
1 IN T RO DU CT IO N .................................................................................................... 1-1
General . ................................................................................................................. 1-1
Scope ..................................................................................................................... 1-1
De sc ription ....................................................................................................... 1-1
Disk C a r tr i d g e ................................................................................................ 1-3
Recording F o r m a t ...................................................... ... ............................... 1-5
Encoding S c h e m e ...................... ... ............................................................ 1-5
Track F o r m a t............................................................................................. 1-5
Sector Form at ......................... ... ............................................................ 1-6
Sector Content .................................................................................. 1-6
32-Sector F o r m a t ........................................................................... 1-6
IBM 37 40 Form at ........................................................................... 1-7
Disk Drive A s s e m b l y .................................................................................. 1-8
Printed Circuit Board ............................................................. ... 1-8
Main Deck A s s e m b l y ........................................................................... 1-9
C arrier A s s e m b ly .................................................................................. 1-9
Options-F e a tu re s ......................... ... ................. ... ................. ... ..................... 1-9
Write P r o t e c t ............................................................................................. 1-1
Binary Select ....... ................................ . ............................. 1-10
Radial Select ............................................................................................. 1-10
Hard S e c t o r ................................................................................................ 1-11
16/8 Sector ................................................................................................ 1-11
Auto E r a s e .................................................................................................... 1-11
Data Separator (FM O n ly ) .................. ... ............................... ... 1-11
Auto Head Load . ...................................... ... 1-12
Activity Indicator .................................................................................. 1-12
PCB A ssembly Option C o n fig u ratio n s .................................... 1-12
Spec ificatio n s...................................................................................... ... 1-12
2 O P ERA TIO N ................................ .............................................................................. 2-1
Gene r a l ...................................................................................... ... ........................ 2-1
Daily O pe ration................................................................................................ 2-1
Floppy Disk Handling and S to r a g e ............................................... 2-1
Floppy Disk Loading and Unloading ............... ... 2-2
W rit e -P r o te c t ............................. ... ............................................................ 2-3
ILL
Section Page

TABLE OF CONTENTS (Continued)
3 THEORY OF OPERATION ........................................................................ 3-1
G e n e r a l.............................................................................................................. 3-1
Control S y s t e m ..................... ... . . ....................................................... 3-2
Command Execution .................. ... ................................................... 3-2
Status S e n sin g.......................................................................................... 3-3
Positioning System ................................................................................... 3-3
Stepper Motor C o n t r o l ....................................................... ... 3-3
Stepper M o to r.......................................................................................... 3-4
Carriage A s s e m b ly ............................................................................ 3-4
Read/Write S y s t e m ................................................................................... 3-4
Read/Write Operation ..................................................................... 3-4
Functional D e s c rip tio n ............................................................................ 3-5
Spindle Drive S y s t e m
........................................................................ 3-6
Spindle System . .............................. «............................................ 3-7
Read/Write Head Positioning System ................................... 3-7
Head Load S y s te m ............................................................................... 3-8
Control and Data T im in g .................................................................. 3-8
Logic C onvention s .............. ... .................................................................... 3-10
Detailed Logic D e s cr ip t io n ................................................................. 3-10
Control L o g i c ................................................................................................ 3-10
Select . ............................ ........................................................................... 3-13
Binary Select (Option)........................................................................ 3-14
Index/Sector D e t e ctio n ..................................................................... 3-15
Hard Sector (Option)............................................................................ 3-16
Ready . .............................. ... .......................................................... ... 3 - 16
Activity Indicator .................. ... .......................................................... 3-18
Door Lock (Option) .............. ... ............................................................. 3-19
Disk C h a n g e............................................. ... 3-19
Read/W rite Head Positioning Logic ............................................. 3-20
Head L o a d ................................................................................................ 3-20
Track 00 Switch . ............................................................. ... ................. 3-20
Stepper Motor Drive . ........................................................................ 3-22
Interface Gating. . .......................................................... ... 3-22
State Counter . .................................................................................. 3-22
Stepper Motor Drivers . ............................................................. 3-23
Stepper Motor ............................................................................... 3-24
Read/Write L o g i c ...................................................................................... 3-25
Write-Protect . . ................................................ ... 3-26
Write Mode . ............................................................................................ 3-26
Write and Erase Gating .......................................................... 3-26
Erase L o g i c ....................................................... ... ........................... 3-27
DC U n s a f e .......................................................................................... 3-28
Write Current Control . ............................................................. 3-29
Low Write Current C o n tr o l ............................... ... ................. 3-30
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TABLE OF CONTENTS (Continued)
3 THEORY OF OPERATION (Continued)
Read M o d e ...................... ... .......................................................................... 3-31
Read/Write S e l e c t ........................................................................... 3-32
Read LSI Circuit, Read Amplifier, and Filter . . . 3-32
Differentiating Network .................. ... . e . s s « ............... . 3-34
Crossover Detector . ...................................................................... 3-35
Time Domain Filter .................................................................... 3-35
FM Data Separator (Option)............................................................. 3-36
Terminating Resistor Network . . .............................................. 3-37
4 INSTALLATION....................................................................................................................... 4-1
G e n e r a l ................................................................ ... .............................................. 4-1
Inspection ............................................................................................ ... 4-1
Unpacking ......................... ... .............................................................................. 4-1
Mechanical Checks .............................................................' ....................... 4-2
Connecting C a b le s ............... ... ..................................................... ... 4-2
AC Power C a b l e ...................................................................................... 4-4
DC Power C a b l e ...................................................................................... 4-5
Interface Signal Cable ............... ... ................. ... ................................ 4-5
Interface Signal Descriptions ............... ... ................................... ... . 4-6
Logic Levels and T e r m in a tio n ...................................................... 4-6
Input S ig n als ................................................................................................ 4-8
Output S ig n a ls............................................................................................. 4-8
Interface T im i n g ....................................... ... ................................................. 4-8
System C o n fig uratio n s ....................................... ... ................................... 4-12
Single-Drive C o n fig u ratio n ............................................................. 4-12
Radial Select......................................................................................... 4-12
Daisy-Chained Radial S e l e c t .................................................. 4-13
Binary S e l e c t .............. ... ............................... ... ............................... 4-14
Interface/Internal Options Installation . .......................................... 4-16
Radial Select ................................ ... ........................................................ 4-16
Binary Select" . .......................................... ... .............................................. 4-18
Radial S te p ............... ... ................................................................................. 4-18
Radial Ready ....................................... ... 4-19
Ready Option ............................................................................................. 4-20
Radial In d e x /S e cto r ............... ... ............................................................ 4-20
Radial Head Load O ption.................................................................... 4-20
Auto Head Load O p tio n ............................. ... ..................... ... 4-21
Hard S e c t o r .............................................. ... ............................................. 4-22
16 or 8 Sector . ................. ... ................................................................... 4-22
Activity Indicator S e l e c t........................................... ... ................. ... 4-22
FM Data Separator . . . ................. ... ................................................. 4-23
Section Page
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TABLE OF CONTENTS (Continued)
4 INSTALLATION (Continued)
Tunnel-Erase Option . ..................................... ... ........................ ... 4-23
Write Protect O p tio n .............................................................. ... 4-23
Disk Change Option . ........................................................................... 4-24
Phase O p t io n ....................................................... ... .............................. 4-24
Installation .................................................................................................... 4-25
Mounting D im e n sio n s ........................................................................ 4-25
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vi

LIST OF ILLUSTRATIONS
1-1 Floppy Disk Drive Model F D D 1 0 0 - 8 D .............................................. 1-1
1-2 Floppy Disk and Protective Envelope .............................................. 1-3
1-3 Single and Double Density Encoding .................................................. 1-5
1-4 32-Sector F o r m a t .............................. ... . ........................................ ... 1-6
1-5 IBM 3740 Format ........................................................................................... 1-7
1-6 Physical Dimensions and Mounting p r o v is i o n s .......................... 1-16
2-1 Floppy Disk and Storage Envelope
.............. . . . . ....................... 2-2
2-2 Floppy Disk Loading .................................................................................... 2-3
3-1 Floppy Disk D rive, Simplified Block Diagram .......................... 3-1
3-2 Detailed Functional Block D ia g r a m ..................................................... 3-5
3-3 Spindle Drive S y s t e m ................... ... ............................................................. 3-6
3-4 Spindle S y s t e m .................................................................................................. 3-7
3-5 Read/Write Head Positioning System ............................................... 3-8
3-6 Control and Data T im in g .............................................................................. 3-9
3-7 Interface Logic L e v e l s ..................................................... ... ....................... 3-10
3-8 Logic S y m b olo gy .............................................................................................. 3-11
3-9 Select L o g i c ......................................................................................................... 3-13
3-10 Index Detection Logic .. .............................................................................. 3-15
3-11 Index Timing ..................................................................................................... 3 -lo
3-12 Hard Sector and 16/8 Sector Option L o g i c .................................... 3-17
3-13 INDEX/SECTOR T im i n g .............................................................................. 3-17
3-14 Ready L o g i c ........................................................................................ ... 3-18
3-15 Head Load L o g ic ............................................................................................... 3-19
3-16 Track 00 L o g ic ................... ... .......................................................................... 3-21
3-17 Track 00 Timing .. ............................................................................................ 3-21
3-18 Stepper Motor Interface Gating L o g i c ............................................... 3-22
3-19 Stepper Motor Timing ................................................................................. 3-23
3-20 Stepper Motor Drivers Logic ................................................................ 3-24
3-21 Write Initiate T im in g
........................ ... .................* .................................. 3-25
3-22 W rite-Protect Logic ......................................................... ... ....................... 3-26
3-23 Write and Erase Gating L o g i c
................ ... ................. ... . .................... 3-27
3-24 E rase L o g i c ......................................................................................................... -*-28
3-25 Erased Data P a t t e r n ........................ ... .................... ... . .................... ... . 3-29
3-26 DC Unsafe L o g i c ................................................................................. ... 3-29
3-27 Write Current Control Logic . . . . . . .............................. ... 3-30
Figure Page
vii

LIST OF ILLUSTRATIONS (Continued)
Figure Page
3-28 Write Current S w itc h in g ............................................................................ 3-31
3-29 Write Current Timing ................................................................................ 3-32
3-30 Read Initiate Timing .................................................................................... 3-33
3-31 Read Logic, Simplified Diagram ........................................................ 3-33
3-32 Read Preamplifier and Filter C i r c u it .............................................. 3-34
3-33 Differentiating Network....................................
... ......................................... 3-34
3-34 Read Data Waveforms .......................................... ... .................................. 3-35
3-35 Time Domain Filter Logic ...................................................................... 3-35
3-36 FM Data Separator (Option) Logic ..................................................... 3-35
3-37 FM Data Separator Output Timing ..................................................... 3-36
3-38 Terminating R esistor N etw o rk............................................................... 3-37
4-1 Principal Parts Location............................................................................. 4-3
4-2 AC Connector J 2 .............................................................................................. 4-5
4-3 DC Connector J 2 .............................................................................................. 4-5
4-4 Interconnecting D ia gram ............................................................................. 4-7
4-5 Single-Drive Configuration............................................................ ... 4-12
4-6 Radial Select Configuration...................................................................... 4-13
4-7 Daisy-Chained Radial Select C onfiguration.................................... 4-14
4-8 Binary Select Configuration ...................................................................... 4-15
4-9 Interface/internal O p tions.......................................................................... 4-17
viii

LIST OF TABLES
1-1 Floppy Disk C h a ra c t e r i s tic s .................. ... ........................................ . 1-4
1-2 Principal S p e cific a tio ns ....................................... ... ............................ ... . 1-13
2-1 Floppy Disk Loading and Unloading . , . ........................ ... , , . . 2-3
3-1 Disk Drive Selection ........................................................................ ... 3-14
4-1 AC Power R equ irem e n ts............................................................................ ... 4-4
4-2 DC Power Requirements . .............................................................................. 4-5
4-3 Recommended J3 Mating C onnecto rs.................................. ... 4-6
4-4 Interface Input S ig n a l s ..................................... ... .......................................... 4-9
4-5 Interface Output Signals , , , , .. .............................................. ... 4-11
Table Page
ix