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Contents
C141-E050-02EN ix
4.6.1 Read/write preamplifier (PreAMP) 4-9
4.6.2 Write circuit 4-10
4.6.3 Read circuit 4-12
4.6.4 Digital PLL circuit 4-13
4.7 Servo Control 4-14
4.7.1 Servo control circuit 4-14
4.7.2 Data-surface servo format 4-18
4.7.3 Servo frame format 4-18
4.7.4 Actuator motor control 4-19
4.7.5 Spindle motor control 4-20
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 5-13
5.3.1 Command code and parameters 5-14
5.3.2 Command descriptions 5-16
5.3.3 Error posting 5-68
5.4 Command Protocol 5-70
5.4.1 Data transferring commands from device to host 5-70
5.4.2 Data transferring commands from host to device 5-72
5.4.3 Commands without data transfer 5-74
5.4.4 Other commands 5-75
5.4.5 DMA data transfer commands 5-75
5.5 Ultra DMA Feature Set 5-77
5.5.1 Overview 5-77