ATA Bus Interface and ATA Commands

 

 

 

 

 

Table 5-2Identify Drive Command Parameters

 

 

 

Word

 

CONTENT DESCRIPTION

 

 

 

 

67

Minimum PIO transfer cycle time without flow control

 

 

 

 

15-0:

Cycle time in nanoseconds

 

 

68

Minimum PIO transfer cycle time with IORDY flow control

 

 

 

 

15-0:

Cycle time in nanoseconds

 

 

69-70

Reserved (for future command overlap and queuing)

 

 

71-74

Reserved for IDENTIFY PACKET DEVICE command.

 

 

75

Queue depth

 

 

 

 

15-5:

Reserved

 

 

 

 

4-0:

Maximum queue depth – 1

 

 

76-79

Reserved for Serial ATA

 

 

80

Major version number

 

 

 

0000h or FFFFh = device does not report version

 

 

 

 

15:

Reserved

 

 

 

 

14:

Reserved for ATA/ATAPI-14

 

 

 

 

13:

Reserved for ATA/ATAPI-13

 

 

 

 

12:

Reserved for ATA/ATAPI-12

 

 

 

 

11:

Reserved for ATA/ATAPI-11

 

 

 

 

10:

Reserved for ATA/ATAPI-10

 

 

 

 

9:

Reserved for ATA/ATAPI-9

 

 

 

 

8:

Reserved for ATA/ATAPI-8

 

 

 

 

7:

Reserved for ATA/ATAPI-7

 

 

 

 

6:

1 = supports ATA/ATAPI-6

 

 

 

 

5:

1 = supports ATA/ATAPI-5

 

 

 

 

4:

1 = supports ATA/ATAPI-4

 

 

 

 

3:

1 = supports ATA-3

 

 

 

 

2:

Obsolete

 

 

 

 

1:

Obsolete

 

 

 

 

0:

Reserved

 

 

 

Quickview 300 80/100/120/160/200/250/300GB PATA

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Image 51
Maxtor 300 manual Minimum PIO transfer cycle time without flow control