Fujitsu MHU2100AT Product Manual page 15

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
C141-E202-01EN
(1) RECALIBRATE (X'10' to X'1F') ................................................. 5-20
(2) READ SECTOR(S) (X'20' or X'21') ............................................ 5-21
(3) READ LONG (X'22' or X'23') ..................................................... 5-23
(4) WRITE SECTOR(S) (X'30' or X'31')........................................... 5-24
(5) WRITE LONG (X'32' or X'33').................................................... 5-26
(6) WRITE VERIFY (X'3C')............................................................... 5-27
(7) READ VERIFY SECTOR(S) (X'40' or X'41') ............................. 5-28
(8) SEEK (X'70' to X'7F') .................................................................. 5-29
(9) EXECUTE DEVICE DIAGNOSTIC (X'90') ................................ 5-30
(10) INITIALIZE DEVICE PARAMETERS (X'91') ......................... 5-32
(11) DOWNLOAD MICRO CODE (X'92') ........................................ 5-33
(12) STANDBY IMMEDIATE (X'94' or X'E0') ............................... 5-35
Contents
xi