Seagate 7200.8 PATA Computer Drive User Manual


  Open as PDF
of 48
 
Barracuda 7200.8 PATA Product Manual, Rev. F
27
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.
You can use a daisy-chain cable to connect two drives to a single AT host bus. For detailed information about
the ATA interface, refer to the draft of AT Attachment with Packet Interface Extension (ATA/ATAPI-7), NCITS
T13 1410D, subsequently referred to as the Draft ATA-7 Standard.
4.1 ATA interface signals and connector pins
Figure 7 on page 27 summarizes the signals on the ATA interface connector that the drive supports. For a
detailed description of these signals, refer to the Draft ATA-7 Standard.
Figure 7 I/O pins and supported ATA signals
Reset
–
Ground
DD7
DD8
DD6
DD9
DD5
DD10
DD4
DD11
DD3
DD12
DD2
DD13
DD1
DD14
DD0
DD15
Ground
(removed)
DMARQ
Ground
DIOW–
STOP
Ground
DIOR
–
HDMARDY
–
HSTROBE
Ground
IORDY
DDMARDY–
DSTROBE
CSEL
DMACK
–
Ground
INTRQ
IOCS16
–
DA1
PDIAG
–
CBLID–
DA0
DA2
CS0
–
CS1
–
DASP
–
Ground
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
Hardware Reset
Ground
Host Data Bus Bit 7
Host Data Bus Bit 8
Host Data Bus Bit 6
Host Data Bus Bit 9
Host Data Bus Bit 5
Host Data Bus Bit 10
Host Data Bus Bit 4
Host Data Bus Bit 11
Host Data Bus Bit 3
Host Data Bus Bit 12
Host Data Bus Bit 2
Host Data Bus Bit 13
Host Data Bus Bit 1
Host Data Bus Bit 14
Host Data Bus Bit 0
Device Data (15:0)
Ground
(No Pin)
DMA Request
Ground
Device I/O Write:
Stop Ultra DMA Burst
Ground
Device I/O Read:
Host Ultra DMA Ready:
Host Ultra DMA Data Strobe
Ground
I/O Channel Ready
Device Ultra DMA Ready
Device Ulta DMA Data Strobe
Cable Select
DMA Acknowledge
Ground
Device Interrupt
Reserved
Host Address Bus Bit 1
Passed Diagnostics
Cable Assembly Type Identifie
r
Device Address (2:0)
Device Address (2:0)
Chip Select (1:0)
Chip Select (1:0)
Drive Active/Slave Present
Ground
Host pin # and signal description
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
Drive pin #
Signal name
Pins 28, 34 and 39 are used for master-slave communication (details shown below
).
Host
28
34
39
Drive 0 (master)Drive 1 (slave)
28
34
39
28
34
39
CSEL
PDIAG
–
DASP–
 previous next