Command Format ..................................................................................................................................... 1-1

1.2

Status ........................................................................................................................................................ 1-6

1.3

Outline of Command Processing .............................................................................................................. 1-8

1.3.1

Single commands .............................................................................................................................. 1-8

1.3.2

Command link ................................................................................................................................... 1-9

1.3.3

Disconnect/reconnect processing .................................................................................................... 1-11

1.3.4

Synchronous mode data transfer/wide mode data transfer .............................................................. 1-15

1.4

Command Queuing Function.................................................................................................................. 1-16

1.4.1

Untagged queuing............................................................................................................................ 1-16

1.4.2

Tagged queuing ............................................................................................................................... 1-18

1.5

UNIT ATTENTION Condition .............................................................................................................. 1-19

1.5.1

Generation of the UNIT ATTENTION condition ........................................................................... 1-19

1.5.2

Response and release condition at UNIT ATTENTION condition hold state................................. 1-20

1.5.3

UNIT ATTENTION condition multiple hold.................................................................................. 1-22

1.6

Sense Data Hold State ............................................................................................................................ 1-22

1.6.1

Sense data hold condition................................................................................................................ 1-22

1.6.2

Response and release conditions at sense data hold state ................................................................ 1-22

1.7

Command Processing Exceptions........................................................................................................... 1-23

1.7.1

Overlapping commands................................................................................................................... 1-23

1.7.2

Illegal LUN specification ................................................................................................................ 1-24

1.7.3

Reserved operation code.................................................................................................................. 1-24

1.7.4

Command processing in the not ready state .................................................................................... 1-24

1.7.5

Error recovery processing ............................................................................................................... 1-26

1.7.6

Reset processing .............................................................................................................................. 1-28

1.7.7

Fatal hardware errors....................................................................................................................... 1-29

1.8

Data Block Addressing ........................................................................................................................... 1-30

1.8.1

Definition of data space................................................................................................................... 1-30

1.8.2

Logical block addressing................................................................................................................. 1-32

CHAPTER 2 Data Buffer Management............................................................................................................ 2-1

2.1

Data Buffer ............................................................................................................................................... 2-1

2.1.1

Data buffer configuration and basic operation .................................................................................. 2-1

C141-C010

Contents

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