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TP Position A
On
This horizontally positioned jumper across the two TP positions nearest PCB edge, connects
terminator power from SCSI bus I/O pin 26 to the drive's internal terminators (for single-ended I/
O only).
Off
See above explanations for TP jumpers.
J5
Jumper
Installation
Jumper Function Description
A 0 ,A 1 ,A 2
Drive ID on SCSI Bus (J6 may be used instead). The drive ID is binary coded position-wise i.e.,
jumper in position A 2 is drive ID 4, in position A 1 is ID 2, position A 0 is ID 1 and no jumpers is ID
0. Default is ID = 0.
J5 does not exist on "NC" model drives. The drive ID signals are included in the 80 pin I/O
connector and J6.
J6
Jumper
Installation
Jumper Function Description
A 2 ,A 1 ,A 0
Drive ID on SCSI bus. Either J5 or J6 (optional) may be used to select drive ID. Both should
not be used at the same time, because at some future time when the ID is changed the user
could fail to configure both J5 and J6 the same. Default is ID = 0. On "NC" model drives, drive
ID signals are also included in tthe 80 pin I/O connector.
SSP
Used only as a cable connection for the reference index signal (REFIND+) (J6 Pin 6, bottom) for
sync spindle feature. J6 pin 5 is GRD. See paragraphs 10.2, 5.7 for description of synchronized
spindle operation. A jumper is installed when no cable is installed. Default is jumper installed.
LED
No jumper ever installed. These pins used to connect a cable for a remote LED indicator. Pin 3
(top, nearest HDA), the anode connection, connects in the drive to the +5V supply through a
pull-up resistor. Pin 4 (bottom), the cathode connection connects in the drive to signal common
through the emitter-collector junction of a transistor switch that controls the LED on/off condition.
RES
Reserved position. No jumper to be installed.
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B
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