Travelstar 25GS
Electrical interface specifications |
Model: DARA-225000 |
Cabling
|
| The maximum cable length from the host system to the drive plus circuit
pattern in the host system shall not exceed 18 inches. |
A/T interface connector
|
| The A/T interface connector is designed to mate with Dupont part number 69764-044 or equivalent. |
 |
| Notes:
A/T = IDE. Pin position 20 is left blank for secure connector
insertion. Pin position A,B,C, and D are used for drive address
setting. |
Signal definition
|
|
| Pin |
Signal |
I/O |
Pin |
Signal |
I/O |
| 01 |
-RESET |
I |
02 |
GND |
|
| 03 |
DD07 |
I/O |
04 |
DD08 |
I/O |
| 05 |
DD06 |
I/O |
06 |
DD09 |
I/O |
| 07 |
DD05 |
I/O |
08 |
DD10 |
I/O |
| 09 |
DD04 |
I/O |
10 |
DD11 |
I/O |
| 11 |
DD03 |
I/O |
12 |
DD12 |
I/O |
| 13 |
DD02 |
I/O |
14 |
DD13 |
I/O |
| 15 |
DD01 |
I/O |
16 |
DD14 |
I/O |
| 17 |
DD00 |
I/O |
18 |
DD15 |
I/O |
| 19 |
GND |
|
(20) |
KEY |
|
| 21 |
DMARQ |
O |
22 |
GND |
|
| 23 |
-DIOW * |
I |
24 |
GND |
|
| 25 |
-DIOR * |
I |
26 |
GND |
|
| 27 |
IORDY * |
O |
28 |
CSEL |
I |
| 29 |
-DMACK |
I |
30 |
GND |
|
| 31 |
INTRQ |
O |
32 |
-IOCS16 |
O |
| 33 |
DA01 |
I |
34 |
-PDIAG |
I/O |
| 35 |
DA00 |
I |
36 |
DA02 |
I |
| 37 |
-CS0 |
I |
38 |
-CS1 |
I |
| 39 |
-DASP |
I/O |
40 |
GND |
|
| 41 |
+5V Logic |
PWR |
42 |
+5V Motor |
PWR |
| 43 |
GND |
|
44 |
Reserved |
|
Notes: |
- "O" designates an output from the drive.
- "I" designates an input to the drive.
- "I/O" designates an input/output common.
- "PWR" designates a power supply to the drive.
- "(Resv)" designates reserved pins which must be left unconnected.
- "*" these signal lines are redifined during the Ultra DMA protocol to provide special functions as detailed
in the table below. These lines change from the conventional to special definitions at the moment the host decides to
allow a DMA burst, if the Ultra DMA transfer mode was previously chosen via SetFeatures. The drive becomes aware
of this change upon assertion of the -DMACK line. These lines revert back to their original definitions upon the
deassertion of -DMACK at the termination of the DMA burst.
- There are two input pins for +5V power supply, "+5V Logic" and "+5V Motor". These two input pins
are tied together within drive.
|
| Operation |
Special Definition (Ultra DMA) |
Conventional Definition |
| Write |
-DDMARDY |
IORDY |
| HSTROBE |
-DIOR |
| STOP |
-DIOW |
| Read |
-HDMARDY |
-DIOR |
| DSTROBE |
IORDY |
| STOP |
-DIOW |
|
|
|
