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3.0 ATA Attachment-3 Interface (ATA-3)
The drives in this manual comply with the ATA-3 Standard, proposed by
the X3T10 committee, a Technical Committee of Accredited Standards
Committee X3, of the American National Standards Institute (ANSI).
The X3T10 committee has been renamed to X3T13 to reflect its current
standards work. For more information about the committee and the
standards, see the committee’s Internet FTP site:
ftp://fission.dt.wdc.com/pub/standards/X3T13T
3.1 ATA interface signals and connector pins
Figure 6 on page 26 summarizes the signals on the ATA interface
connector that the drive supports. For a detailed description of these
signals, refer to the
Working Draft of the Proposed American National
Standard X3T10/2008D Revision 6, Information Technology AT Attach-
ment-3 Interface (ATA-3),
subsequently referred to as the
Draft Proposed
ATA-3 Standard.
3.1.1 AT bus signal levels
Signals that the drive sends have the following output characteristics at
the drive connector:
Logic Low 0.0V to 0.4V
Logic High 2.5V to 5.25V
Signals that the drive receives must have the following input charac-
teristics, measured at the drive connector:
Logic Low 0.0V to 0.8V
Logic High 2.0V to 5.25V
Marathon 2250 and Marathon 1680 Product Manual 25