Seagate ST15150DC, Product Manual

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52 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D
Block Pins Function
J01 1 & 2* Terminator power supplied from the drive.
2 & 4* Terminator power supplied from the SCSI bus.
1 & 3 Terminator power supplied to the SCSI bus.
1 & 3 and Terminator power supplied to the SCSI bus and drive.
2 & 4*
— Host adapter or other device on the SCSI bus provides
terminator power to the external terminator (no jumper on
any of the J01 pins).
J4 1 & 2 Write Protect option. Jumper installed write protects the
entire disc drive. Default is no jumper.
3 & 4 Delay Motor Start option. Jumper installed waits for 10
seconds for each target ID number plus a maximum
power-up delay of 3 seconds before starting the spindle
motor automatically. Default is no jumper.
Example:
If target ID is equal to three (3)
(3
×
10)
+
3 = 33
Target spindle motor starts
in 33 seconds.
5 & 6 Enable Motor Start option. Jumper installed causes the
target to wait for the Start Unit command from the SCSI
host. No jumper installed causes the unit to look at the
Delay Motor Start jumper. Default is no jumper.
7 & 8 Parity Disable option. Jumper installed causes parity
checking and error reporting to be disabled. Default is no
jumper.
9 & 10 Reserved. Default is no jumper.
11 & 12* Enable ST15150W Drive Terminator. Jumper installed
enables the drive terminator on ST15150W drives. Jumper
removed disables the drive terminator. Default is no
jumper.
13 & 14 Reserved. Default is no jumper.
J5 1 & 2** SCSI ID selector 0
3 & 4** SCSI ID selector 1
5 & 6** SCSI ID selector 2
7 & 8** SCSI ID selector 3
9 & 10 Remote LED connector. Pin 9 is cathode (neg). Pin 10 is
anode (pos). Pin 10 is current limited through a 1K ohm,
1/10W resistor.
11 & 12 Spindle sync cable connector. Pin 11 is the SSREF+ or
reference index signal. Pin 12 is Ground.
* Valid for single-ended (ST15150W) drives only.
** See Figure 22 to set the SCSI ID.