Scsi Termination - Motorola MVME2700 Series Installation And Use Manual

SCSI Termination

The individual configuring the system must ensure that the SCSI bus is
properly terminated at both ends.
In MVME712M I/O mode, the base board uses the sockets provided for
SCSI bus terminators on the three-row P2 adapter board supplied with the
MVME712M. If the SCSI bus ends at the adapter board, termination
resistors must be installed there. +5Vdc power to the SCSI bus
signal and termination resistors is supplied through a fuse located on the
adapter board. The five-row P2 adapter, MVME761P2-011 is compatible
with the MVME712M for support of 16-bit SCSI and PMC I/O. It requires
a five-row backplane.
In MVME761 I/O mode, the P2 adapter board used with the MVME761
has a jumper to enable/disable SCSI bus terminators. +5Vdc power for
SCSI termination is supplied through a polyswitch located on the adapter
board.
Ethernet Interface
The MVME2700 VMEmodule uses Digital Equipment's DEC21140 PCI
Fast Ethernet LAN controller to implement an Ethernet interface that
supports both AUI (via MVME712M) and 10Base-T/100Base-TX (via
MVME761) connections. The balanced differential transceiver lines are
coupled via on-board transformers.
The MVME2700 routes its AUI or 10Base-T/100Base-TX lines through
the P2 connector to the transition module (as illustrated in
Figure
connector for an AUI connection. The MVME761 supports 10Base-
T/100Base-TX connections.
Every MVME2700 is assigned an Ethernet station address. The address is
$08003E2xxxxx, where xxxxx is the unique 5-nibble number assigned to
the board (every board has a different value for xxxxx).
Each MVME2700 displays its Ethernet station address on a label attached
to the base board in the PMC connector keepout area just behind the front
panel. In addition, the six bytes including the Ethernet station address are
http://www.mcg.mot.com/literature
3-5). The MVME712M front panel has an industry-standard DB15
Block Diagram
TERMPWR
Figure 3-4 and
5-7
5