Ata Interface; Ata Interface Signals And Connector Pins; Figure 7 I/O Pins And Supported Ata Signals - Maxtor STM3320820A Owner's 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.
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 31 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.
Drive pin # Signal name
Reset –
1
2 Ground
3 DD7
4 DD8
5 DD6
6 DD9
7 DD5
8 DD10
9 DD4
10 DD11
11 DD3
12 DD12
13 DD2
14 DD13
15 DD1
16 DD14
17 DD0
18 DD15
19 Ground
(removed)
20
21 DMARQ
22 Ground
23 DIOW–
STOP
24 Ground
DIOR –
25
HDMARDY –
HSTROBE
26 Ground
27 IORDY
DDMARDY–
DSTROBE
28 CSEL
DMACK –
29
30 Ground
31 INTRQ
IOCS16 –
32
33 DA1
PDIAG –
34
CBLID–
35 DA0
36 DA2
CS0 –
37
CS1 –
38
DASP –
39
40 Ground
Pins 28, 34 and 39 are used for master-slave communication (details shown below).
Drive 1 (slave) Drive 0 (master)
28 28
34 34
39 39
Figure 7 I/O pins and supported ATA signals
DiamondMax 21 PATA Product Manual, Rev. A
Host pin # and signal description
1 Hardware Reset
2 Ground
3 Host Data Bus Bit 7
4 Host Data Bus Bit 8
5 Host Data Bus Bit 6
6 Host Data Bus Bit 9
7 Host Data Bus Bit 5
8 Host Data Bus Bit 10
9 Host Data Bus Bit 4
10 Host Data Bus Bit 11
11 Host Data Bus Bit 3
12 Host Data Bus Bit 12
13 Host Data Bus Bit 2
14 Host Data Bus Bit 13
15 Host Data Bus Bit 1
16 Host Data Bus Bit 14
17 Host Data Bus Bit 0
18 Device Data (15:0)
19 Ground
(No Pin)
20
21 DMA Request
22 Ground
23 Device I/O Write:
Stop Ultra DMA Burst
24 Ground
25 Device I/O Read:
Host Ultra DMA Ready:
Host Ultra DMA Data Strobe
26 Ground
27 I/O Channel Ready
Device Ultra DMA Ready
Device Ulta DMA Data Strobe
28 Cable Select
29 DMA Acknowledge
30 Ground
31 Device Interrupt
32 Reserved
33 Host Address Bus Bit 1
34 Passed Diagnostics
Cable Assembly Type Identifier
35 Device Address (2:0)
36 Device Address (2:0)
37 Chip Select (1:0)
38 Chip Select (1:0)
39 Drive Active/Slave Present
40 Ground
Host
CSEL 28
PDIAG –
34
DASP–
39
31