1-16
Themis Computer
PMC/XMC Carrier Board Manual
1.2.6
Rotary Switch
The 2P2 PMC Carrier Board provides a 16-position Rotary Switch that is connected
to the Coolrunner Complex Programmable Logic Device (CPLD). This switch
allows you to change the switch position from the 2P2 PMC Carrier Board front
panel. The 16 positions correspond to 16 user-defined meanings.
Depending on the solder bead settings, the rotary switch position may also be pre-
sented as a binary value on VME P2 connector pins A2 through A5. Refer to
Table 1-15
on page 1-23 for details.
1.2.7
Stereo Audio Connectors
The 2P2 PMC Carrier Board provides audio input and output via two audio jacks on
the board’s front panel.
The audio jacks (shown in
Figure 1-8
) can be configured to provide one of two I/O
options, depending on the setting of particular solder beads on the 2P2 PMC board
(see
Table 1-9
on page 1-18 and
Table 1-10
on page 1-19 for Audio I/O solder bead
settings). You specify solder-bead preferences when you order your unit. You may
chose to have the 2P2 PMC board configured with one of following options:
•
Line In/Line Out
•
MIC In/Headphone Out
Note:
OBP records the value of the user-defined Rotary Switch as an OBP envi-
ronment variable called
themis-switch-value
. The default value for this
variable is 255 (0xff), which is assigned if the 2P2 PMC Carrier Board
is not
con-
nected. If the board
is
connected, a value from 0 through 15 is assigned.
To find the value of the switch setting from OBP, type:
ok printenv themis-switch-value
To find the value of the switch setting from Solaris, type:
# prtconf -vp | grep themis
Warning:
Solder beads are set by Themis at the factory. DO NOT ATTEMPT TO
ALTER SOLDER-BEAD CONFIGURATIONS! Attempting to alter a solder-bead
configuration could seriously damage the carrier boards. If you encounter a prob-
lem, contact Themis Customer Support.
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