Fujitsu MHW2040AC User Manual download pdf (Page 15)

Contents

4.6.2 Write circuit............................................................................................. 4-9

4.6.3 Read circuit............................................................................................ 4-10

4.6.4 Digital PLL circuit................................................................................. 4-11

4.7 Servo Control ...................................................................................................4-12

4.7.1 Servo control circuit ..............................................................................4-12

4.7.2 Data-surface servo format ..................................................................... 4-15

4.7.3 Servo frame format................................................................................4-17

4.7.4 Actuator motor control .......................................................................... 4-18

4.7.5 Spindle motor control............................................................................ 4-19

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 .............................................................................................5-7

5.2.2 Command block registers........................................................................5-8

5.2.3 Control block registers .......................................................................... 5-13

5.3 Host Commands ...............................................................................................5-14

5.3.1 Command code and parameters.............................................................5-14

5.3.2 Command descriptions ..........................................................................5-18

(1) RECALIBRATE (X’10’ to X’1F’)................................................. 5-20

(2) READ SECTOR(S) (X’20’ or X’21’) ............................................ 5-21

(3) WRITE SECTOR(S) (X’30’ or X’31’)........................................... 5-23

(4) WRITE VERIFY (X’3C’)............................................................... 5-25

(5) READ VERIFY SECTOR(S) (X’40’ or X’41’)............................. 5-26

(6) SEEK (X’70’ to X’7F’) .................................................................. 5-27

(7) EXECUTE DEVICE DIAGNOSTIC (X’90’) ................................ 5-28

(8) INITIALIZE DEVICE PARAMETERS (X’91’) ........................... 5-30

(9) DOWNLOAD MICROCODE (X’92’)........................................... 5-31

(10) STANDBY IMMEDIATE (X’94’ or X’E0’) ............................... 5-33

(11) IDLE IMMEDIATE (X’95’ or X’E1’) / UNLOAD

IMMEDIATE (X’95’ or X’E1’).................................................... 5-34

(12) STANDBY (X’96’ or X’E2’) ....................................................... 5-36

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Fujitsu MHW2040AC User Manual Page 15