AT Attachment-3 Interface (ATA-3), Revision 6

1-3 Forward, Introduction, Scope, Normative references, Definitions, abbreviations, and conventions
4 Interface physical and electrical requirements
5 Interface signal assignments and descriptions
6 Interface register definitions and descriptions
7 General operational requirements
8 Command descriptions
9 Protocol
10 Timing
Annex A Connectors
Annex B Identify device data for ATA devices below 8 GB
Annex C Signal integrity
Annex D Bibliography
Annex E ATA command set summary

  • Annex E ATA command set summary

    • (informative)

    The following four tables are provided to facilitate the understanding of the ATA command set. Table E.1 provides information on which command codes are currently defined. Table E.2 provides a list of all of the ATA commands in order of command code. Table E.3 provides a summary of all commands with the protocol, required use, command code and registers used for each. Table E.4 shows the status and error bits used by each command.

    Table E.1 - Command matrix
     

    x0

    x1

    x2

    x3

    x4

    x5

    x6

    x7

    x8

    x9

    xA

    xB

    xC

    xD

    xE

    xF

    0x

    C

    R

    R

    R

    R

    R

    R

    R

    C

    R

    R

    R

    R

    R

    R

    R

    1x

    C

    O

    O

    O

    O

    O

    O

    O

    O

    O

    O

    O

    O

    O

    O

    O

    2x

    C

    C

    C

    C

    R

    R

    R

    R

    R

    R

    R

    R

    R

    R

    R

    R

    3x

    C

    C

    C

    C

    R

    R

    R

    R

    R

    R

    R

    R

    C

    R

    R

    R

    4x

    C

    C

    R

    R

    R

    R

    R

    R

    R

    R

    R

    R

    R

    R

    R

    R

    5x

    C

    R

    R

    R

    R

    R

    R

    R

    R

    R

    R

    R

    R

    R

    R

    R

    6x

    R

    R

    R

    R

    R

    R

    R

    R

    R

    R

    R

    R

    R

    R

    R

    R

    7x

    C

    O

    O

    O

    O

    O

    O

    O

    O

    O

    O

    O

    O

    O

    O

    O

    8x

    V

    V

    V

    V

    V

    V

    V

    V

    V

    V

    V

    V

    V

    V

    V

    V

    9x

    C

    C

    C

    R

    C

    C

    C

    C

    C

    C

    V

    R

    R

    R

    R

    R

    Ax

    C

    C

    C

    R

    R

    R

    R

    R

    R

    R

    R

    R

    R

    R

    R

    R

    Bx

    C

    R

    R

    R

    R

    R

    R

    R

    R

    R

    CR

    CR

    CR

    CR

    CR

    CR

    Cx

    V

    V

    V

    V

    C

    C

    C

    R

    C

    C

    C

    C

    R

    R

    R

    R

    Dx

    R

    R

    R

    R

    R

    R

    R

    R

    R

    R

    R

    O

    O

    O

    C

    C

    Ex

    C

    C

    C

    C

    C

    C

    C

    R

    C

    O

    R

    R

    C

    C

    C

    C

    Fx

    V

    C

    C

    C

    C

    C

    C

    V

    V

    V

    V

    V

    V

    V

    V

    V

    Key:

    C = a unique command

    R = Reserved, undefined in current specifications

    V = Vender specific commands

    O = Obsolete

    Table E.2 - Commands sorted by command value (continued)
     

    Command name

    Command code
     

    NOP

    00h
     

    ATAPI SOFT RESET

    08h
     

    RECALIBRATE

    10h
     

    READ SECTOR(S) (w/ retry)

    20h
     

    READ SECTOR(S) (w/o retry)

    21h
     

    READ LONG (w/ retry)

    22h
     

    READ LONG (w/o retry)

    23h
     

    WRITE SECTOR(S) (w/ retry)

    30h
     

    WRITE SECTOR(S) (w/o retry)

    31h
     

    WRITE LONG (w/ retry)

    32h
     

    WRITE LONG (w/o retry)

    33h
     

    WRITE VERIFY

    3Ch
     

    READ VERIFY SECTOR(S) (w/ retry)

    40h
     

    READ VERIFY SECTOR(S) (w/o retry)

    41h
     

    FORMAT TRACK

    50h
     

    SEEK

    70h

    Table E.2 - Commands sorted by command value (concluded)
     

    Command name

    Command code
     

    EXECUTE DEVICE DIAGNOSTIC

    90h
     

    INITIALIZE DEVICE PARAMETERS

    91h
     

    DOWNLOAD MICROCODE

    92h
     

    STANDBY IMMEDIATE (See note 1)

    94h E0h
     

    IDLE IMMEDIATE (See note 1)

    95h E1h
     

    STANDBY (See note 1)

    96h E2h
     

    IDLE (See note 1)

    97h E3h
     

    CHECK POWER MODE (See note 1)

    98h E5h
     

    SLEEP (See note 1)

    99h E6h
     

    ATAPI PACKET

    A0h
     

    ATAPI IDENTIFY DEVICE

    A1h
     

    ATAPI SERVICE

    A2h
     

    SMART

    B0h
     

    READ MULTIPLE

    C4h
     

    WRITE MULTIPLE

    C5h
     

    SET MULTIPLE MODE

    C6h
     

    READ DMA (w/ retry)

    C8h
     

    READ DMA (w/o retry)

    C9h
     

    WRITE DMA (w/ retry)

    CAh
     

    WRITE DMA (w/o retry)

    CBh
     

    DOOR LOCK

    DEh

     

    DOOR UNLOCK

    DFh
     

    STANDBY IMMEDIATE (See note 1)

    E0h 94h
     

    IDLE IMMEDIATE (See note 1)

    E1h 95h
     

    STANDBY (See note 1)

    E2h 96h
     

    IDLE (See note 1)

    E3h 97h
     

    READ BUFFER

    E4h
     

    CHECK POWER MODE (See note 1)

    E5h 98h
     

    SLEEP (See note 1)

    E6h 99h
     

    WRITE BUFFER

    E8h
     

    IDENTIFY DEVICE

    ECh
     

    MEDIA EJECT

    EDh
     

    IDENTIFY DEVICE DMA

    EEh
     

    SET FEATURES

    EFh
     

    SECURITY SET PASSWORD (See note 1)

    F1h-BAh
     

    SECURITY UNLOCK (See note 1)

    F2h-BBh
     

    SECURITY ERASE PREPARE (See note 1)

    F3h-BCh
     

    SECURITY ERASE UNIT (See note 1)

    F4h-BDh
     

    SECURITY FREEZE (See note 1)

    F5h-BEh
     

    SECURITY DISABLE PASSWORD (See note 1)

    F6h-BFh
     

    Note:

    1 These commands have two command codes and appear in this table twice, once for each command code.

     

    Table E.3 - Command codes and parameters (continued)

    proto

    Command

    typ

    Command

    Parameters used
         

    code

    FR

    SC

    SN

    CY

    DH

    ND

    CHECK POWER MODE

    O

    98h E5h

    		  

    y

    		    

    D

    ND

    DOOR LOCK

    O

    DEh

    		        

    D

    ND

    DOOR UNLOCK

    O

    DFh

    		        

    D

    PO

    DOWNLOAD MICROCODE

    O

    92h

    y

    y

    y

    y

    D

    ND

    EXECUTE DEVICE DIAGNOSTIC

    M

    90h

    		        

    D*

    VS

    FORMAT TRACK

    V

    50h

    		        

    d

    PI

    IDENTIFY DEVICE

    M

    ECh

    		        

    D

    DM

    IDENTIFY DEVICE DMA

    O

    EEh

    		        

    D

    ND

    IDLE

    O

    97h E3h

    		  

    y

    		    

    D

    ND

    IDLE IMMEDIATE

    O

    95h E1h

    		        

    D

    ND

    INITIALIZE DEVICE PARAMETERS

    M

    91h

    		  

    y

    		    

    y

    ND

    MEDIA EJECT

    O

    EDh

    		        

    D

    ND

    NOP

    O

    00h

    		        

    D

    PI

    READ BUFFER

    O

    E4h

    		        

    D

    DM

    READ DMA (w/ retry)

    M

    C8h

    		  

    y

    y

    y

    y

    DM

    READ DMA (w/o retry)

    M

    C9h

    		  

    y

    y

    y

    y

    PI

    READ LONG (w/ retry)

    O

    22h

    		  

    y

    y

    y

    y

    PI

    READ LONG (w/o retry)

    O

    23h

    		  

    y

    y

    y

    y

    PI

    READ MULTIPLE

    M

    C4h

    		  

    y

    y

    y

    y

    PI

    READ SECTOR(S) (w/ retry)

    M

    20h

    		  

    y

    y

    y

    y

    PI

    READ SECTOR(S) (w/o retry)

    M

    21h

    		  

    y

    y

    y

    y

    ND

    READ VERIFY SECTOR(S) (w/ retry)

    M

    40h

    		  

    y

    y

    y

    y

    ND

    READ VERIFY SECTOR(S) (w/o retry)

    M

    41h

    		  

    y

    y

    y

    y

    ND

    RECALIBRATE

    O

    10h

    		        

    D

    PO

    SECURITY DISABLE PASSWORD

    O

    BFh-F6h

    		        

    D

    ND

    SECURITY ERASE PREPARE

    O

    BCh-F3h

    		        

    D

    PO

    SECURITY ERASE UNIT

    O

    BDh-F4h

    		        

    D

    ND

    SECURITY FREEZE

    O

    BEh-F5

    		        

    D

    PO

    SECURITY SET PASSWORD

    O

    BAh-F1H

    		        

    D

    PO

    SECURITY UNLOCK

    O

    BBh-F2h

    		        

    D

    ND

    SEEK

    M

    70h

    		    

    y

    y

    y

    ND

    SET FEATURES

    M

    EFh

    y

    		      

    D

    ND

    SET MULTIPLE MODE

    M

    C6h

    		  

    y

    		    

    D

    ND

    SLEEP

    O

    99h E6h

    		        

    D

    ND

    SMART DISABLE OPERATIONS

    O

    0B0h

    y

    		    

    y

    D

    ND

    SMART ENABLE/DISABLE AUTOSAV

    O

    0B0h

    y

    y

    		  

    y

    D

    ND

    SMART ENABLE OPERATIONS

    O

    0B0h

    y

    		    

    y

    D

    PI

    SMART READ THRESHOLDS

    O

    0B0h

    y

    		    

    y

    D

    PI

    SMART READ VALUES

    O

    0B0h

    y

    		    

    y

    D

    ND

    SMART RETURN STATUS

    O

    0B0h

    y

    		    

    y

    D

    ND

    SMART SAVE VALUES

    O

    0B0h

    y

    		    

    y

    D

    ND

    STANDBY

    O

    96h E2h

    		  

    y

    		    

    D

    ND

    STANDBY IMMEDIATE

    O

    94h E0h

    		        

    D

    PO

    WRITE BUFFER

    O

    E8h

    		        

    D

    DM

    WRITE DMA (w/ retry)

    M

    CAh

    		  

    y

    y

    y

    y

    DM

    WRITE DMA (w/o retry)

    M

    CBh

    		  

    y

    y

    y

    y

    PO

    WRITE LONG (w/ retry)

    O

    32h

    *

    y

    y

    y

    y

    PO

    WRITE LONG (w/o retry)

    O

    33h

    *

    y

    y

    y

    y

     

    Table E.3 - Command codes and parameters (concluded)

    proto

    Command

    typ

    Command

    Parameters used
         

    code

    FR

    SC

    SN

    CY

    DH

    PO

    WRITE MULTIPLE

    M

    C5h

    *

    y

    y

    y

    y

    PO

    WRITE SECTOR(S) (w/ retry)

    M

    30h

    *

    y

    y

    y

    y

    PO

    WRITE SECTOR(S) (w/o retry)

    M

    31h

    *

    y

    y

    y

    y

    PO

    WRITE VERIFY

    O

    3Ch

    *

    y

    y

    y

    y

    VS

    Vendor specific

    V

    9Ah,C0h-C3h,8xh,

    F0h-FFh

    		          

    -

    Reserved: all remaining codes

    R

    		            

    Key:

    DM = DMA command ND = Non-data command PI = PIO data in command

    PO = PIO data out command VS = Vendor specific command O = Optional

    M = Mandatory R = Reserved V = Vendor specific implementation

    CY = Cylinder registers SC = Sector Count register DH = Device/Head register

    SN = Sector Number register FR = Features register (see command descriptions for use)

    y = the register contains a valid parameter for this command. For the Device/Head register, y means both the device and head parameters are used.

    D = only the device parameter is valid and not the head parameter.

    d = the device parameter is valid, the usage of the head parameter vendor specific.

    D* = Addressed to device 0 but both devices execute it.

    * = Maintained for compatibility (see 6.2.10)

    Table E.4 - Status and error usage (continued)
     

    Status register

    Error register
     

    DRDY

    DF

    CORR

    ERR

    BBK

    UNC

    IDNF

    ABRT

    TK0NF

    AMNF

    ACKNOWLEDGE MEDIA

    CHANGE

    V

    V

    		  

    V

    		      

    V

    		    

    BOOT - POST-BOOT

    V

    V

    		  

    V

    		      

    V

    		    

    BOOT - PRE-BOOT

    V

    V

    		  

    V

    		      

    V

    		    

    CHECK POWER MODE

    V

    V

    		  

    V

    		      

    V

    		    

    DOOR LOCK

    V

    V

    		  

    V

    		      

    V

    		    

    DOOR UNLOCK

    V

    V

    		  

    V

    		      

    V

    		    

    DOWNLOAD MICROCODE

    V

    V

    		  

    V

    		      

    V

    		    

    EXECUTE DEVICE

    DIAGNOSTIC

    V

    V

    		  

    V

    See 8.5

    FORMAT TRACK

    V

    V

    		  

    V

    V

    V

    V

    V

    V

    V

    IDENTIFY DEVICE

    V

    		                  

    IDENTIFY DEVICE DMA

    V

    		                  

    IDLE

    V

    V

    		  

    V

    		      

    V

    		    

    IDLE IMMEDIATE

    V

    V

    		  

    V

    		      

    V

    		    

    INITIALIZE DEVICE

    PARAMETERS

    V

    V

    		                

    MEDIA EJECT

    V

    V

    		  

    V

    		      

    V

    		    

    NOP

    V

    V

    		  

    V

    		      

    V

    		    

    READ BUFFER

    V

    V

    		  

    V

    		      

    V

    		    

    READ DMA (w/ retry)

    V

    V

    V

    V

    V

    V

    V

    V

    		  

    V

    READ DMA (w/o retry)

    V

    V

    V

    V

    V

    V

    V

    V

    		  

    V

    READ LONG (w/ retry)

    V

    V

    		  

    V

    V

    		  

    V

    V

    		  

    V

    READ LONG (w/o retry)

    V

    V

    		  

    V

    V

    		  

    V

    V

    		  

    V

    READ MULTIPLE

    V

    V

    V

    V

    V

    V

    V

    V

    		  

    V

    READ SECTOR(S) (w/ retry)

    V

    V

    V

    V

    V

    V

    V

    V

    		  

    V

    READ SECTOR(S) (w/o retry)

    V

    V

    V

    V

    V

    V

    V

    V

    		  

    V

    READ VERIFY SECTOR(S)

    (w/ retry)

    V

    V

    V

    V

    V

    V

    V

    V

    		  

    V

     

    Table E.4 - Status and error usage (concluded)
     

    Status register

    Error register
     

    DRDY

    DF

    CORR

    ERR

    BBK

    UNC

    IDNF

    ABRT

    TK0NF

    AMNF

    READ VERIFY SECTOR(S)

    (w/o retry)

    V

    V

    V

    V

    V

    V

    V

    V

    		  

    V

    RECALIBRATE

    V

    V

    		  

    V

    		      

    V

    V

    		  

    SECURITY DIS PASSWORD

    V

    V

    		  

    V

    		      

    V

    		    

    SECURITY ERASE PREP

    V

    V

    		  

    V

    		      

    V

    		    

    SECURITY ERASE UNIT

    V

    V

    		  

    V

    		      

    V

    		    

    SECURITY FREEZE

    V

    V

    		  

    V

    		      

    V

    		    

    SECURITY SET PASSWRD

    V

    V

    		  

    V

    		      

    V

    		    

    SECURITY UNLOCK

    V

    V

    		  

    V

    		      

    V

    		    

    SEEK

    V

    V

    		  

    V

    		    

    V

    V

    		    

    SET FEATURES

    V

    V

    		  

    V

    		      

    V

    		    

    SET MULTIPLE MODE

    V

    V

    		  

    V

    		      

    V

    		    

    SLEEP

    V

    V

    		  

    V

    		      

    V

    		    

    SMART DISABLE OPS

    V

    		    

    V

    		      

    V

    		    

    SMART EN/DIS AUTOSAVE

    V

    		    

    V

    		      

    V

    		    

    SMART ENABLE OPS

    V

    		    

    V

    		      

    V

    		    

    SMART READ THRSHOLDS

    V

    		    

    V

    		    

    V

    V

    		    

    SMART READ VALUES

    V

    		    

    V

    		    

    V

    V

    		    

    SMART RETURN STATUS

    V

    		    

    V

    		      

    V

    		    

    SMART SAVE VALUES

    V

    V

    		  

    V

    		    

    V

    V

    		  

    V

    STANDBY

    V

    V

    		  

    V

    		      

    V

    		    

    STANDBY IMMEDIATE

    V

    V

    		  

    V

    		      

    V

    		    

    WRITE BUFFER

    V

    V

    		  

    V

    		      

    V

    		    

    WRITE DMA (w/ retry)

    V

    V

    		  

    V

    V

    		  

    V

    V

    		    

    WRITE DMA (w/o retry)

    V

    V

    		  

    V

    V

    		  

    V

    V

    		    

    WRITE LONG (w/ retry)

    V

    V

    		  

    V

    V

    		  

    V

    V

    		    

    WRITE LONG (w/o retry)

    V

    V

    		  

    V

    V

    		  

    V

    V

    		    

    WRITE MULTIPLE

    V

    V

    		  

    V

    V

    		  

    V

    V

    		    

    WRITE SECTOR(S) (w/ retry)

    V

    V

    		  

    V

    V

    		  

    V

    V

    		    

    WRITE SECTOR(S)

    (w/o retry)

    V

    V

    		  

    V

    V

    		  

    V

    V

    		    

    WRITE VERIFY

    V

    V

    V

    V

    V

    V

    V

    V

    		  

    V

    Invalid command code

    V

    V

    		  

    V

    		      

    V

    		    

    Key: V = valid on this command