Electrical Interface Specifications; Cabling; Interface Connector; Figure 37. Interface Connector Pin Assignments - IBM IC25N020ATDA04 - Travelstar 20 GB Hard Drive Specifications

7.0 Electrical interface specifications

7.1 Cabling

The maximum cable length from the host system to the hard disk drive shall not exceed 18 inches.

7.2 Interface connector

The signal connector for AT attachment is designed to mate with the 50 pin plug specified in Annex A,
Connectors and Cable Assembly, of the ATA/ATAPI-5 document.
The figure below and Figure 29 on page 34 show the connector location and physical pin location.

Figure 37. Interface connector pin assignments

Note 1: Pin position 20 is left blank for correct connector insertion.
Note 2: Pin positions A, B, C, and D are used for drive address setting. (Refer to Figure 51 on page 62
for correct address setting.)
43
44
Travelstar 48GH, 30GN & 15GN hard disk drive specifications
Pin
1
19
2
22
Pin
45
C A
D
B