Chapter 5: 5953 USB DynaKey Migration
5-5
Furthermore,
USB
defines
several
levels
of
standards,
including
a
standard
for
Human
Interface
Devices.
This
standard
specifies
behavior
for
many
devices
that
are
widely
used
in
the
computer
industry,
and
allows
proprietary
extensions
to
be
added
for
those
devices
that
are
less
widely
used.
NCR’s
keyboard
includes
both
fully
standard
HID
devices,
such
as
the
keyboard
itself
and
the
MSR,
and
less
‐
widely
used
and
thus
customized
HID
devices
such
as
the
Keylock
and
Error
Tone.
The
USB
DynaKey
implements
a
standard
seven
‐
port
USB
Hub
internally,
which
provides
independent
connectivity
to
the
several
functional
sections
that
comprise
the
DynaKey.
Both
USB
and
Wedge
NCR
DynaKeys
include
keys
that
accept
customer
‐
specified
key
caps
and
labels.
For
example,
one
customer
may
wish
to
include
buttons
for
DEPT
,
CLASS
,
and
SKU
on
his
keyboard.
A
different
customer
may
have
no
use
for
these
keys,
but
may
want
TIRES
,
BATTERIES
,
and
ACCESSORIES
on
specific
keys.
Capable
keys
provide
for
this
customization.
