Chapter 4:
Programming
Firmware
USB DynaKey Capabilities
The
NCR
USB
DynaKey
is
a
multifunction
device
comprised
of
several
functions,
including
a
keyboard
switch
matrix
and
a
speaker.
Both
of
these
functions
are
controlled
by
a
single
field
programmable
gate
array
(FPGA).
The
keyboard
matrix
translates
between
a
key
switch
physical
location
and
the
key
data
reported
to
the
host
PC.
This
matrix
is
programmable.
The
matrix
may
be
replaced
in
whole
or
in
part,
permitting
any
key
to
be
mapped
to
any
function.
The
FPGA
has
the
ability
to
sound
a
short
chirp
whenever
a
key
is
pressed,
providing
auditory
feedback
to
an
operator
of
the
keyboard.
This
auditory
feedback
is
optional.
The
FPGA
may
be
configured
to
make
the
sound
or
not
to
make
the
sound,
depending
on
the
particular
application.
The
FPGA
has
no
static
memory
and
thus
cannot
retain
any
settings
after
power
loss.
Thus,
each
time
the
system
to
which
this
keyboard
is
connected
is
powered
‐
up,
or
any
time
the
keyboard
is
connected
to
a
powered
system,
the
FPGA
must
be
informed
of
any
pertinent
settings.
This
function
is
an
ActiveX/COM
control
(
NCRUsbKeyboardCtl
)
that
provides
a
mechanism
by
which
the
keyboard
features
of
“key
click
sound”
and
“key
translation
matrix”
can
be
set.
The
keyboard
firmware
is
standard
USB
compatible
keyboard
firmware
with
added
extensions
for
POS
‐
specific
functions.
