Fujitsu MHD2032AT Manual Do Utilizador

C141-E050-02EN

ix

4.6.1

Read/write preamplifier (PreAMP)     4-9

4.6.2

Write circuit     4-10

4.6.3

Read circuit     4-12

4.6.4

Digital PLL circuit     4-13

4.7

Servo Control     4-14

4.7.1

Servo control circuit     4-14

4.7.2

Data-surface servo format     4-18

4.7.3

Servo frame format     4-18

4.7.4

Actuator motor control     4-19

4.7.5

Spindle motor control     4-20

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     5-7

5.2.2

Command block registers     5-8

5.2.3

Control block registers     5-13

5.3

Host Commands     5-13

5.3.1

Command code and parameters     5-14

5.3.2

Command descriptions     5-16

5.3.3

Error posting     5-68

5.4

Command Protocol     5-70

5.4.1

Data transferring commands from device to host     5-70

5.4.2

Data transferring commands from host to device     5-72

5.4.3

Commands without data transfer     5-74

5.4.4

Other commands     5-75

5.4.5

DMA data transfer commands     5-75

5.5

Ultra DMA Feature Set     5-77

5.5.1

Overview     5-77