Barracuda 18LP Family: ST39175LW/LC ST318275LW ... - Seagate
Barracuda 18LP Family: ST39175LW/LC ST318275LW ... - Seagate
Barracuda 18LP Family: ST39175LW/LC ST318275LW ... - Seagate
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
64 <strong>Barracuda</strong> <strong>18LP</strong> Product Manual, Rev. E<br />
Notes [ ] for Tables 13b and 13d.<br />
[1] See Section 9.7.1 for detailed electrical characteristics of these signals.<br />
[2] The conductor number refers to the conductor position when using 0.025-inch (0.635 mm) centerline flat<br />
ribbon cable. Other cables types may be used to implement equivalent contact assignments.<br />
[3] Connector contacts are on 0.050 inch (1.27 mm) centers.<br />
[4] Front panel LED signal; indicates drive activity for host front panel hard drive activity indicator.<br />
[5] Asserted by host to enable Motor Start option (enables starting motor via SCSI bus command).<br />
[6] Asserted by host to enable Delayed Motor Start option (motor starts at power on or after a delay of 12 seconds<br />
times drive ID). This and [5] above are mutually exclusive options.<br />
[7] Binary code on A3, A2, A1 and A0 asserted by host to set up SCSI bus ID in drive.<br />
[8] GND provides a means for differential devices to detect the presence of a single ended device on the bus.<br />
Drive will not operate I/O bus at ULTRA-2 data rates if this is grounded.<br />
[9] Signals [4] through [7] are used in place of installing jumpers and cables on option select connectors J2<br />
and J6. See Section 8.1.1 notes.<br />
[10] “NC” means no connection.<br />
[11] 8 bit devices which are connected to the 16 data bit differential I/O shall leave the following signals open:<br />
–DB12 –DB13 –DB14 –DB15 –DBP1 –DB8 –DB9 –DB10 –DB11,<br />
+DB12 +DB13 +DB14 +DB15 +DBP1 +DB8 +DB9 +DB10 +DB11.<br />
8 bit devices which are connected to the 16 data bit single-ended I/O shall have the following signals connected<br />
as shown:<br />
to ground: +DB12 +DB13 +DB14 +DB15 +DBP1 +DB8 +DB9 +DB10 +DB11,<br />
open circuit: –DB12 –DB13 –DB14 –DB15 –DBP1 –DB8 –DB9 –DB10 –DB11.<br />
All other signals should be connected as shown.