1-3
Themis Computer
1—2P2 PMC Carrier Board
2P2 PMC Carrier Board Overview
User I/O on the 2P2 PMC Carrier Board can be accessed from both the front-panel and
paddle-board connectors. In some instances, accessing a signal from one of these
access sources prevents the signal from being accessed from the second source. For
example, if TTYE is routed to the VME P2 backplane, then TTYE cannot be accessed
from the front panel.
For information regarding paddle boards, refer to your system’s hardware manual
(USPIIe, USPIIe-Gb, et al.)
As explained further in Section 1.2.3.1 on page 1-8, user I/O on the 2P2 PMC Car-
rier Board can be reconfigured. For example, 64 bits of user I/O can be made avail-
able on PMC Module slot 1, presuming the user I/O on PMC Module slot 2 is not
used. On the other hand, 32 bits of user I/O can be made available on both PMC
Module slot 1 and PMC Module slot 2.
Note:
Some VME P2 I/O signals cannot be accessed using the available paddle
boards. You will need to provide your own connectivity, or call Themis Customer
Support for a cost estimate on building a
custom
Paddle Board.
Note:
User I/O signals can be brought from PMC Modules in
slot 1
and
slot 2
to
the VME P2 connector of the 2P2 PMC Carrier Board.
A PMC Module in
slot 3
has
no
I/O-signal access through the VME P2 connector
of the 2P2 PMC Carrier Board.
Caution:
It is important to make sure that a solder-bead configuration does not
result in an
unwanted change
of system operational parameters. READ ALL
SOLDER-BEAD CONFIGURATION DESCRIPTIONS CAREFULLY.
(See
Table 1-9
on page 1-18.)
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