7 servo control – FUJITSU MPC3065AH User Manual

Page 55

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C141-E056-01EN

4 - 14

Table 4.3

Write clock frequency and transfer rate of each zone

Zone

0

1

2

3

4

5

6

7

Cylinder

0

to

760

761

to

1520

1521

to

2280

2281

to

3040

3041

to

3800

3801

to

4530

4531

to

5165

5166

to

5790

Transfer rate
[MB/s]

19.18

19.18

19.18

19.18

19.18

19.18

18.54

17.91

Zone

8

9

10

11

12

13

14

Cylinder

5791

to

6775

6776

to

7105

7106

to

7815

7816

to

8495

8496

to

9045

9046

to

9590

9591

to

10423

Transfer rate
[MB/s]

16.86

16.51

15.73

14.96

14.33

13.70

12.65

The MPU transfers the data transfer rate setup data (SDATA/SCLK) to the RDC that includes
the time base generator circuit to change the data transfer rate.

4.7

Servo Control

The actuator motor and the spindle motor are submitted to servo control. The actuator motor
is controlled for moving and positioning the head to the track containing the desired data. To
turn the disk at a constant velocity, the actuator motor is controlled according to the servo data
that is written on the data side beforehand.

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