2-20
Themis Computer
PMC/XMC Carrier Board Manual
2.3
2P2 PMC/XMC Carrier Board Solder Beads
Solder beads are found on both the
top side
and
bottom side
of the 2P2 PMC/XMC
Carrier Board and are described in
Table 2-9
.
In
Table 2-9
, if no pad number is given, only
2
solder pads exist. If there are
3
or
more
solder pads, the two pads listed are shorted together.
Short
means a solder
bead
is
installed, creating an electrical path between contacts.
Open
means a solder
bead
is not
installed, hence the path between the contacts is open.
Figure 2-12
on page 2-27, provides the location of the 2P2 PMC/XMC Carrier
Board solder beads, jumper pins, and switches on the
top side
of the board; those on
the
bottom side
are shown in
Figure 2-13
on page 2-28. Remember that pad 4 is
always the long vertical pad to the right of pads 1, 2, and 3, as can be seen in
Figure
2-12
, page 2-27 and
Figure 2-13
, page 2-28.
Caution:
When dealing with a
3- or 4-pad
solder-bead switch, a solder bead will
short only one set of pads.
If a solder bead shorts more than 2 pads, call Themis Customer Support.
Table 2-9.
2P2 PMC/XMC Carrier Board Solder-Bead Settings
Solder
Bead
a
Setting
b
Description
SB1
to
SB32
Short 1–4
VME P2 connector pinout configuration (see
Table 2-11
, page 2-26)
Short 2–4
Short 3–4
SB33
and
SB34
Short 1–2
Audio interface configuration (see
Table 2-10
, page 2-26)
Default:
Line In/Line Out
Short 2–3
SB35
and
SB36
Short 1–2
Short 2–3
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