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Contents
C141-E262 xi
4.6.3 Read circuit ........................................................................................... 4-11
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 ..........................................................................5-6
5.1.4 Connector pinouts ................................................................................... 5-7
5.1.5 P11 function ............................................................................................ 5-8
5.1.6 Hot Plug ................................................................................................ 5-10
5.2 Logical Interface ..............................................................................................5-11
5.2.1 Communication layers .......................................................................... 5-12
5.2.2 Outline of the Shadow Block Register.................................................. 5-13
5.2.3 Outline of the frame information structure (FIS) ................................. 5-14
5.2.4 Shadow block registers ......................................................................... 5-22
5.3 Host Commands...............................................................................................5-27
5.3.1 Command code and parameters............................................................ 5-27
5.3.2 Command descriptions.......................................................................... 5-30
(1) RECALIBRATE (X '10' to X '1F')................................................ 5-31
(2) READ SECTOR(S) (X '20' or X '21') ........................................... 5-32
(3) WRITE SECTOR(S) (X '30' or X '31') ......................................... 5-34
(4) WRITE VERIFY (X '3C') ............................................................. 5-36
(5) READ VERIFY SECTOR(S) (X '40' or X '41')............................ 5-38
(6) SEEK (X '70' to X '7F') ................................................................. 5-40
(7) EXECUTE DEVICE DIAGNOSTIC (X '90')............................... 5-41
(8) INITIALIZE DEVICE PARAMETERS (X '91').......................... 5-42