FUJITSU MPA3043AT - Manual (Page 7)

C141-E034-02EN viii
3.4.1 Location of setting jumpers .................................................................................................. 3 - 9
3.4.2 Factory default setting .......................................................................................................... 3 - 10
3.4.3 Jumper configuration ............................................................................................................ 3 - 10
CHAPTER 4 THEORY OF DEVICE OPERATION............................................................... 4 - 1
4.1 Outline .................................................................................................................................. 4 - 1
4.2 Subassemblies....................................................................................................................... 4 - 1
4.2.1 Disk....................................................................................................................................... 4 - 1
4.2.2 Head...................................................................................................................................... 4 - 2
4.2.3 Spindle.................................................................................................................................. 4 - 3
4.2.4 Actuator ................................................................................................................................ 4 - 3
4.2.5 Air filter ................................................................................................................................ 4 - 3
4.3 Circuit Configuration ............................................................................................................ 4 - 4
4.4 Power-on Sequence .............................................................................................................. 4 - 6
4.5 Self-calibration ..................................................................................................................... 4 - 8
4.5.1 Self-calibration contents ....................................................................................................... 4 - 8
4.5.2 Execution timing of self-calibration......................................................................................4 - 9
4.5.3 Command processing during self-calibration........................................................................ 4 - 9
4.6 Read/write Circuit................................................................................................................. 4 - 10
4.6.1 Read/write preamplifier (PreAMP)....................................................................................... 4 - 10
4.6.2 Write circuit.......................................................................................................................... 4 - 10
4.6.3 Read circuit........................................................................................................................... 4 - 12
4.6.4 Time base generator circuit................................................................................................... 4 - 14
4.7 Servo Control........................................................................................................................ 4 - 15
4.7.1 Servo control circuit ............................................................................................................. 4 - 16
4.7.2 Data-surface servo format..................................................................................................... 4 - 19
4.7.3 Servo frame format ............................................................................................................... 4 - 19
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
5.2.1 I/O registers .......................................................................................................................... 5 - 6