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Contents
4.6.4 Digital PLL circuit ................................................................................ 4-12
4.7 Servo Control ................................................................................................... 4-13
4.7.1 Servo control circuit .............................................................................. 4-13
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 interface regulation .................................................................... 5-4
5.1.3 Electrical specifications ........................................................................ 5-7
5.1.4 Connector pinouts ............................................................................... 5-10
5.1.5 P11 function........................................................................................5-11
5.1.6 Hot Plug .............................................................................................. 5-13
5.2 Logical Interface ............................................................................................. 5-14
5.2.1 Communication layers ........................................................................ 5-15
5.2.2 Outline of the Shadow Block Register................................................ 5-16
5.2.3 Outline of the frame information structure (FIS)................................ 5-17
5.2.4 Shadow block registers ....................................................................... 5-24
5.3 Host Commands .............................................................................................. 5-29
5.3.1 Command code and parameters .......................................................... 5-29
5.3.2 Command descriptions........................................................................ 5-32
(1) RECALIBRATE (X’10’ to X’1F’) ............................................... 5-33
(2) READ SECTOR(S) (X’20’ or X’21’)......................................... 5-34
(3) WRITE SECTOR(S) (X’30’ or X’31’)........................................ 5-36
(4) WRITE VERIFY (X’3C’) ............................................................ 5-38
(5) READ VERIFY SECTOR(S) (X’40’ or X’41’) .......................... 5-40
(6) SEEK (X’70’ to X’7F’)................................................................. 5-42
(7) EXECUTE DEVICE DIAGNOSTIC (X’90’)............................... 5-43
(8) INITIALIZE DEVICE PARAMETERS (X’91’).......................... 5-44
(9) DOWNLOAD MICROCODE (X’92’) ......................................... 5-45
(10) STANDBY IMMEDIATE (X’94’ or X’E0’)................................ 5-47
C141-E249 xi