Unit installation

MAX+PLUS II Getting Started
337 Altera Corporation
clocks the register. This time always
represents an external pin-to-pin delay.
t
CO
is also a timing assignment that
specifies the maximum acceptable Clock to
output delay. In MAX+PLUS II, you can
specify a required t
CO
for an entire project
and/or for any input pin (INPUT or
INPUTC), output pin (OUTPUT or
OUTPUTC), or TRI buffer (i.e., BIDIR or
BIDIRC pin output function) pin.
TDF see Text Design File.
ternary operator An operator that selects
between two expressions within an AHDL
arithmetic expression. The ternary
operator is used in the following format:
<expn 1> ? <expn 2> : <expn 3>
If the first expression is non-zero (true), the
second expression is evaluated and given
as the result of the ternary expression.
Otherwise, the third expression is
evaluated and given as the result of the
ternary expression.
Text Design Export File (.tdx) An ASCII
text file (with the extension .tdx) in AHDL
that is optionally generated when you
compile a Xilinx Netlist Format File (.xnf).
It contains the same logic as the XNF File.
A Text Design Export File can be saved as a
Text Design File (.tdf) and used to replace
the corresponding XNF File in the
hierarchy of a project.
Text Design File (.tdf) An ASCII text file
(with the extension .tdf) written in AHDL.
Text Design Export Files (.tdx) and Text
Design Output Files (.tdo) can be saved as
TDFs and compiled with MAX+PLUS II.
Text Design Output File (.tdo) An ASCII
text file (with the extension .tdo), generated
by the MAX+PLUS II Compiler, that
contains the AHDL equivalent of the fully
optimized logic for a device in the project.
The Compiler generates a TDO File, as well
as an Assignment & Configuration Output
File (.aco) when you compile a project if
you turn on the Generate AHDL TDO File
command (Processing menu).
You can save a TDO File as a Text Design
File (.tdf) and recompile it. (You must also
save the Assignment & Configuration
Output File (.aco) as an Assignment &
Configuration File (.acf) if you wish to
preserve the assignments for the device.)
TDO Files facilitate back-annotation and
preserve the existing logic synthesis in the
project.
time unit A unit for specifying a time in
MAX+PLUS II. Five time units are
available:
A time value is always followed
immediately (i.e., with no space in
between) by a time unit. If you do not enter
a time unit, either ns or mhz is assumed as
the default, depending on the appropriate
context.
Timing Analyzer Output File (.tao) An
ASCII text file (with the extension .tao) that
is used to save the results of the current
Time Unit: Abbreviation for:
ns nanosecond
ms millisecond
us microsecond
s second
mhz megahertz
81_GSBOOK.fm5 Page 337 Tuesday, October 14, 1997 4:04 PM