ATA Bus Interface and ATA Commands

 

 

 

 

 

Table 5-2Identify Drive Command Parameters

 

 

 

Word

 

CONTENT DESCRIPTION

 

 

 

 

10-19

Serial number (20 ASCII characters)

 

 

 

20-21

Retired

 

 

 

 

22

Reserved

 

 

 

23-26

Firmware revision (8 ASCII characters)

 

 

27-46

Model number (40 ASCII characters)

 

 

 

47

15-8:

80h

 

 

 

 

7-0:

00h = Reserved

 

 

 

01h-FFh: = Maximum number of sectors that shall be transferred per interrupt on

 

 

READ/WRITE MULTIPLE commands

 

 

 

48

Reserved

 

 

 

49

Capabilities

 

 

 

 

15-14:

Reserved for the IDENTIFY PACKET DEVICE command.

 

 

 

 

13:

 

 

1 = Standby timer values as specified in this standard are supported.

 

0 = Standby timer values shall be managed by the device

 

 

 

 

12:

Reserved for the IDENTIFY PACKET DEVICE command.

 

 

 

 

11:

1 = IORDY supported. 0 = IORDY may be supported

 

 

 

 

10:

1 = IORDY may be disabled

 

 

 

 

9:

1 = LBA supported

 

 

 

 

8:

1 = DMA supported.

 

 

 

 

7-0:

Retired

 

 

50

Capabilities

 

 

 

 

15:

Shall be cleared to zero.

 

 

 

 

14:

Shall be set to one.

 

 

 

 

13-2:

Reserved.

 

 

 

 

1:

Obsolete

 

 

 

 

0:

Shall be set to one to indicate a device specific Standby timer value

 

 

minimum.

 

 

 

51-52

Obsolete

 

 

 

 

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