Product manual

34 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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Figure 10.1-1b. ST12400W/WD family drive ID and option select header (Rear header details)
(J1-auxiliary pins 1A-12A)
SCSI ID = 8
SCSI ID = 9
SCSI ID = 10
SCSI ID = 11
SCSI ID = 12
SCSI ID = 13
SCSI ID = 14
SCSI ID = 15
A
3
A
2
A
1
SCSI ID = 0
SCSI ID = 1
SCSI ID = 2
SCSI ID = 3
SCSI ID = 4
SCSI ID = 5
SCSI ID = 6
SCSI ID = 7
A
0
J1-DC Power
SCSI I/O Connector
J1
J1-Auxiliary
Pin 1A
Drive HDA (rear view, PCB facing downward)
[2]
Pin 1
PCB
Pin 12A
[3]
1P2P3P4P
+5V Ground
1197531
[4]
Host Alternate
Useage Plug:
Ground
8642
Optional connections to switching circuits
in host equipment to establish drive ID.
Pins 2, 4, 6, and 8 are driven low for
250 ms after PWR ON and reset to
allow jumper selectable SCSI ID. [4]
Dashed area is optional host circuitry (external
to the drive) connected to host supplied optional
useage plug. Drive PCB circuitry for Pin 8 includes
a 150 Ω series resistor.
[4]
Remote LED
SSP
+5V