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Table 12. Marking Codes to Identify the Holes in the Prototyping Area
Unconnected
Ground
Signal
Power
Unconnected holes
do not have any
silkscreen marking.
These holes can be
used for any
connections. An
example of this kind
of hole is M8 of
Bank 1.
Holes connected
to ground are
marked with a
solid white square
(represented in
black in this
document). An
example of this
type of hole is
AD4 of Bank 2.
Holes connected to a trace
have a box around them. The
box can be a rectangle around
adjacent holes connected to
traces. An example of this
type of hole is C18 of Bank 3.
An example of a rectangle
enclosing adjacent holes are
holes AB7 to AB9 of Bank 3.
The rectangles have labels
attached providing an
indication of which signals
these are. For example, C18
of Bank 3 is labeled
CPLD(133) and holes AB7 to
AB9 are labeled
CPLD(134:136).
Holes connected
to power rails
have a circle
around them. An
example of this
hole is A23 of
Bank 4, which is
a hole connected
to the 5 V rail.
These may also
have boxes
around them to
help with
labeling.
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SLSC-12101 User Guide