Unit installation

MAX+PLUS II Getting Started
326 Altera Corporation
comprise a Òone-hotÓ code sample because
in each of these four values a single bit is set
to 1.
You can manually implement one-hot
encoding. In addition, the Global Project
Logic Synthesis command (Assign menu)
includes a One-Hot State Machine Encoding
option to allow the Compiler to
automatically implement one-hot
encoding for the entire project. Altera
strongly recommends using the One-Hot
State Machine Encoding option rather than
manual one-hot encoding.
This option is available in both multi-level
and standard synthesis. It is ignored if it
does not apply to the current device family.
OrCAD Library File (.lib) A binary file (with
the extension .lib) containing information
that describes how symbols are displayed
in OrCAD Schematic Files (.sch).
The MAX+PLUS II Graphic Editor uses an
OrCAD-generated OrCAD Library File to
import an OrCAD Schematic File. The
OrCAD Library File for each OrCAD
Schematic File should contain all libraries
for the OrCAD symbols used in the
schematic. This OrCAD Library File must
also be copied to same directory as the
OrCAD Schematic File.
OrCAD Schematic File (.sch) A schematic
design file (with the extension .sch) created
with the OrCAD Draft schematic editor.
You can open and edit an OrCAD
Schematic File in MAX+PLUS II and save it
as both a Graphic Design File (.gdf) and an
OrCAD Schematic File (.sch). An OrCAD
Schematic File can also be compiled
directly by the MAX+PLUS II Compiler.
oscillation An unstable logic level on a
signal. When the Simulator is in timing or
linked simulation mode, you can specify
the time period that constitutes an
oscillation and monitor the project for
signals that do not stabilize within the
defined period. When the Simulator is in
functional simulation mode, you can
monitor the project for nil-period
oscillation only.
Output Enable A high logic level on the
Output Enable signal enables the output.
In MAX 7000 devices (not including
MAX 7000E devices), the signal from the
active-low global Output Enable pin must
be inverted and connected to the active-
high Output Enable input of the TRI
primitive. In all other device families,
either active-high or active-low polarity
can be used.
In MAX 9000 devices, the Fitter
automatically inserts additional LCELL
primitives to provide the correct polarity
for a non-global Output Enable pin or an
Output Enable signal driven by a logic cell.
P
parameter or parameterized A parameter is
an attribute of a megafunction or
macrofunction that determines the logic
created or used to implement the function,
i.e., a characteristic that determines the
size, behavior, or silicon implementation of
a function. The parameter information can
be used to determine the actual primitives
and other subdesigns needed to implement
the logic of the function.
A parameterized function is a function
whose behavior is controlled by one or
more parameters. Some logic functions,
81_GSBOOK.fm5 Page 326 Tuesday, October 14, 1997 4:04 PM