Specifications

TABLE OF CONTENTS
Page
TABLEOFCONTENTS .............................................................. i
LIST
OF FIGURES ................................................................... iii
LIST OF TABLES .................................................................... iv
ABBREVIATIONS/MNEMONICS ....................................................... iv
SECTION I INTRODUCTION ......................................................... 1-1
1. 1 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.2 Specifications Summary
................................................ 1-1
1.2.1 Performance Specifications
........................................ 1,.-1
1.2.2 Functional Specifications ......................................... 1-2
1.2.3 Physical Specifications ........................................... 1-2
1.2.4 Reliability Specifications .......................................... 1-3
1.3 Functional Characteristics
............................................... 1-3
1.3.1 Electronics
.................................................... 1-3
1.3.2 Drive Mechanism ............................................... 1-4
1.3.3 Positioning Mechanism ........................................... 1-4
1.3.4 Read/Write Heads .............................................. 1-4
1.3.5 Recording Formats .............................................. 1-4
1.4 Functional Operations ................................................. 1-4
1.4.1
Power Sequencing .............................................. 1-4
1.4.2 Drive Selection ................................................. 1-4
1.4.3 Motor On ..................................................... 1-4
1.4.4 Track Accessing ................................................ 1-6
1.4.5 Step Out ..................................................... 1-6
1.4.6 Step In ....................................................... 1-6
1.4.7 Side Selection (SA860 Only) .... _ . __ .............................. 1-7
1.4.8 Read Operation ............................... ' ................. 1-8
1.4.9 Write Operation ........................ " ....................... 1-9
1.4.10 Sequence of Events ............................................ 1-10
SECTION
II ELECTRICAL INTERFACE ................................................. 2-1
2.1 Introduction
........................................................ 2-1
2.2 Signal Interface ...................................................... 2-1
2.2.1 InputLines
................................................... 2-1
2.2.2 Input Line Termination .......................................... 2-3
2.2.3 Drive Select 1-4 ................................................ 2-3
2.2.4 Side Select (SA860 Only) ........................................ 2-3
2.2.5 Direction Select ................................................ 2-4
2.2.6 Step ........................................................ 2-4
2.2.7 Write Gate .................................................... 2-4
2.2.8 Write Data .................................................... 2-4
2.2.9 Motor On (Alternate Input) ....................................... 2-4
2.2.10 In Use (Alternate Input) ......................................... 2-4
2.2.11 External Write Current Switch (Alternate Input) ........................ 2-4
2.2.12 Output Lines ...................... : .......................... 2-5
2.2.13 . Track 00 .................................................... 2-5
2.2.14 Index ...................................................... 2-5
2.2.15 Sector (Hard Sector Only) ....................................... 2-5
2.2.16 Ready ...................................................... 2-5
2.2.17 Read Data ................................................... 2-6
2.2.18 Sep Data .................................................... 2-6
2.2.19 SepClock ................................................... 2-6
2.2.20 Write Protect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
2.2.21 True Ready
.................................................. 2-6
2.2.22 Disk Change (Optional Output) .............................. ; .... 2-6
2.2.23 Two Sided (Optional Output) ..................................... 2-6
2.2.24 Alternate I/O Pins ............................................. 2-6