4.2Parallel ATA (ATA) interface

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 AT Attachment - 6 with Packet Interface (ATA/ ATAPI-6), ANSI NCITS 361-200,subsequently referred to as the ATA-6 Standard.

4.2.1PATA interface signals and connector pins

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. Limit the number of PATA interface connector connects and disconnects to a maximum of 50 cycles.

Table 6:

Connector signals

 

 

 

 

 

 

 

Connector

Cable

Signal Name

Contact

Conductor

 

 

 

 

RESET-

 

1

1

 

 

 

 

DD7

 

3

3

 

 

 

 

DD6

 

5

5

 

 

 

 

DD5

 

7

7

 

 

 

 

DD4

 

9

9

 

 

 

 

DD3

 

11

11

 

 

 

 

DD2

 

13

13

 

 

 

 

DD1

 

15

15

 

 

 

 

DD0

 

17

17

 

 

 

 

Ground

 

19

19

 

 

 

 

DMARQ

 

21

21

 

 

 

 

DIOW-

 

23

23

 

 

 

 

DIOR-

 

25

25

 

 

 

 

IORDY

 

27

27

 

 

 

 

DMACK-

 

29

29

 

 

 

 

INTRQ

 

31

31

 

 

 

 

DA1

 

33

33

 

 

 

 

DA0

 

35

35

 

 

 

 

CS1FX-

 

37

37

 

 

 

 

DASP-

 

39

39

 

 

 

 

+5 V (Logic)

 

41

41

 

 

 

Ground (Return)

43

43

 

 

 

 

Cable

Connector

 

Conductor

Contact

Signal Name

 

 

 

2

2

Ground

 

 

 

4

4

DD8

 

 

 

6

6

DD9

 

 

 

8

8

DD10

 

 

 

10

10

DD11

 

 

 

12

12

DD12

 

 

 

14

14

DD13

 

 

 

16

16

DD14

 

 

 

18

18

DD15

 

 

 

20

20

(keypin)

 

 

 

22

22

Ground

 

 

 

24

24

Ground

 

 

 

26

26

Ground

 

 

 

28

28

PSYNC:CSEL

 

 

 

30

30

Ground

 

 

 

32

32

IOCS16-

 

 

 

34

34

PDIAG-

 

 

 

36

36

DA2

 

 

 

38

38

CS3FX-

 

 

 

40

40

Ground

 

 

 

42

42

+5V (Motor)

 

 

 

44

44

No connection

 

 

 

36

EE25.2 Series Product Manual, Rev. E

Page 42
Image 42
Seagate ST930818SM, ST980818AM Parallel ATA ATA interface, Pata interface signals and connector pins, Connector signals

ST940817SM, ST940818SM, ST960817SM, ST930817AM, ST960818AM specifications

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