C141-E069-02EN
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3.4
Jumper Settings
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3 - 12
3.4.1
Location of setting jumpers
............................................................................................
3 - 12
3.4.2
Factory default setting
....................................................................................................
3 - 13
3.4.3
Jumper configuration
......................................................................................................
3 - 13
CHAPTER 4
THEORY OF DEVICE OPERATION
.........................................................
4 - 1
4.1
Outline
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4 - 1
4.2
Subassemblies
................................................................................................................
4 - 1
4.2.1
Disk
................................................................................................................................
4 - 1
4.2.2
Head
...............................................................................................................................
4 - 2
4.2.3
Spindle
............................................................................................................................
4 - 4
4.2.4
Actuator
..........................................................................................................................
4 - 4
4.2.5
Air filter
..........................................................................................................................
4 - 4
4.3
Circuit Configuration
......................................................................................................
4 - 5
4.4
Power-on Sequence
........................................................................................................
4 - 7
4.5
Self-calibration
...............................................................................................................
4 - 9
4.5.1
Self-calibration contents
.................................................................................................
4 - 9
4.5.2
Execution timing of self-calibration
...............................................................................
4 - 10
4.5.3
Command processing during self-calibration
.................................................................
4 - 10
4.6
Read/write Circuit
...........................................................................................................
4 - 11
4.6.1
Read/write preamplifier (PreAMP)
.................................................................................
4 - 11
4.6.2
Write circuit
....................................................................................................................
4 - 11
4.6.3
Read circuit
.....................................................................................................................
4 - 13
4.6.4
Time base generator circuit
.............................................................................................
4 - 14
4.7
Servo Control
.................................................................................................................
4 - 14
4.7.1
Servo control circuit
.......................................................................................................
4 - 15
4.7.2
Data-surface servo format
...............................................................................................
4 - 18
4.7.3
Servo frame format
.........................................................................................................
4 - 18
4.7.4
Actuator motor control
...................................................................................................
4 - 20
4.7.5
Spindle motor control
.....................................................................................................
4 - 21
CHAPTER 5
INTERFACE
...................................................................................................
5 - 1
5.1
Physical Interface
...........................................................................................................
5 - 2
5.1.1
Interface signals
..............................................................................................................
5 - 2
5.1.2
Signal assignment on the connector
...............................................................................
5 - 3
5.2
Logical Interface
.............................................................................................................
5 - 6