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Contents
C141-E217 xi
4.6.1 Read/write preamplifier (PreAMP) ...................................................... 4-9
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