Ata Interface; Ata Interface Connector Pin Assignments - Seagate Medalist Pro Series Product Manual

Medalist Pro 6450/5040 Product Manual, February 1997 25

3.0 ATA Interface

The drives use an ATA-3 interface. The interface complies with ANSI
ATA (AT Attachment) Interface X3T10 Rev. 6.0 ; SFF 8011: ATA Timing
Extension for Local Bus Attachments, Rev. 2.0 and SFF 8019: Identify
drives Data for drives Under 8 GB . The ATA commands that the drives
support are listed on pages 27 and 28. Commands and features with
specific applications for these drives are also discussed in this section.
The ATA interface consists of single-ended, TTL-compatible receivers
and drivers that use an asynchronous interface protocol. The drivers can
sink up to 24 mA and drive a load up to 300 pF. The integrity of the ATA
interface is affected by the interface cable. It is designed to support a
40-conductor, nonshielded interface cable with a maximum length of 18
inches (46 centimeters).

3.1 ATA Interface connector pin assignments

The signal name and signal direction for each I/O connector pin is shown
in Figure 7 on page 26. See the Seagate ATA Interface Reference
Manual , publication number 36111- xxx , for a complete description of
each pin.
Signal names are shown in upper-case letters. If the signal name is
followed by a minus sign (–), the signal is active low. Otherwise, the signal
is active high.