Seagate ST960815A User Manual

Momentus 5400.3 PATA Product Manual, Rev. C

25

These drives use the industry-standard ATA task file interface that supports 16-bit data transfers. It supports 
ATA programmed input/output (PIO) modes 0–4; multiword DMA modes 0–2, and Ultra DMA modes 0–5. The 
drive also supports the use of the IORDY signal to provide reliable high-speed data transfers.

For detailed information about the ATA interface, refer to the draft of AT Attachment with Packet Interface 
Extension (ATA/ATAPI-6), NCITS T13 1410D, subsequently referred to as the Draft ATA-6 Standard.

The following table summarizes the signals on the 44-pin ATA interface connector. For a detailed description of 
these signals, refer to the Draft ATA-6 Standard.        

RESET-

1

1

2

2

Ground

DD7

3

3

4

4

DD8

DD6

5

5

6

6

DD9

DD5

7

7

8

8

DD10

DD4

9

9

10

10

DD11

DD3

11

11

12

12

DD12

DD2

13

13

14

14

DD13

DD1

15

15

16

16

DD14

DD0

17

17

18

18

DD15

Ground

19

19

20

20

(keypin)

DMARQ

21

21

22

22

Ground

DIOW-

23

23

24

24

Ground

DIOR-

25

25

26

26

Ground

IORDY

27

27

28

28

PSYNC:CSEL

DMACK-

29

29

30

30

Ground

INTRQ

31

31

32

32

IOCS16-

DA1

33

33

34

34

PDIAG-

DA0

35

35

36

36

DA2

CS1FX-

37

37

38

38

CS3FX-

DASP-

39

39

40

40

Ground

+5 V (Logic)

41

41

42

42

+5V (Motor)

Ground (Return)

43

43

44

44

No connection