Ata Interface; Ata Interface Signals And Connector Pins - Seagate ST9120822A - Momentus 5400.3 120 GB Hard Drive Product Manual

4.0

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 draft of AT Attachment with Packet Interface
Extension (ATA/ATAPI-6), NCITS T13 1410D, subsequently referred to as the Draft ATA-6 Standard.
4.1

ATA 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.
Table 6: Connector signals
Connector
Signal Name Contact
RESET- 1
DD7 3
DD6 5
DD5 7
DD4 9
DD3 11
DD2 13
DD1 15
DD0 17
Ground 19
DMARQ 21
DIOW- 23
DIOR- 25
IORDY 27
DMACK- 29
INTRQ 31
DA1 33
DA0 35
CS1FX- 37
DASP- 39
+5 V (Logic) 41
Ground (Return) 43
Momentus 5400.3 PATA Product Manual, Rev. C
Cable
Conductor
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
Cable Connector
Conductor Contact
2 2
4 4
6 6
8 8
10 10
12 12
14 14
16 16
18 18
20 20
22 22
24 24
26 26
28 28
30 30
32 32
34 34
36 36
38 38
40 40
42 42
44 44
Signal Name
Ground
DD8
DD9
DD10
DD11
DD12
DD13
DD14
DD15
(keypin)
Ground
Ground
Ground
PSYNC:CSEL
Ground
IOCS16-
PDIAG-
DA2
CS3FX-
Ground
+5V (Motor)
No connection
25