Product manual

Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 33
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10.0 Option/configuration headers
10.1 Drive ID/option select header
Figure 10.1-1a shows a bottom view of the drive (PCB toward viewer) for the purpose of showing the drive ID
and configuration option select jumper connectors for models ST12400W/WD. Figure 10.1-1c shows the
jumper connectors for model ST12400WC. Figure 10.1-1b shows a rear view of the ST12400W/WD model
drive for the purpose of showing J1-auxiliary which has a duplicate pin configuration and purpose of J6
(Figure 10.1-1a) on the rear of the drive. Both J1-auxiliary and J6 have pins for selecting drive ID and for
connecting the synchronized spindle cable and the remote LED cable. Only one or the other should be used,
although using both at the same time would not damage the drive. The notes ([1]-[9]) following the figures
describe the functions of the various jumper positions on the three connectors J2, J1-auxiliary and J6. Sug-
gested part number for the unusual J2 jumper is Molex 52747-0211 (Seagate P/N 77679052).
Figure 10.1-1a. ST12400W/WD family drive ID and option select header (Front and side header details)
SCSI ID = 8
SCSI ID = 9
SCSI ID = 10
SCSI ID = 11
SCSI ID = 12
SCSI ID = 13
SCSI ID = 14
SCSI ID = 15
J1-DC Power
Connector
J2
Drive Front
Pin 1
End
J6
SCSI I/O
Connector
J1-SCSI I/O
Pin 1
J2
Pin 1
HDA
Drive with HDA up,
PCB down,
viewed from front
J6
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
J1-Auxiliary
A
0
See Figure
10.1-1b
[2]
[2]
[2]
[2]
[3]
Delay
Motor Start
Enable
Motor Start
Write Protect
Parity Option
Term. Power
from Drive
Term. Power
to SCSI Bus
Term. Power
from SCSI Bus
Jumper
Positions
Position A
Reserved
R
E
S
D
S
M
E
W
P
P
E
T
E
T
P
T
P
Enable
Terminators
[6]
[5]
[5]
[5]
+5V
Ground
1197531
[4]
Host Alternate
Usage 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
usage plug. Drive PCB circuitry for Pin 8 includes
a 150 Ω series resistor.
[4]
Remote LED
SSP
+5V