Specifications

CHAPTER 2: DESIGN ENTRY
USING ALTERA MEGAFUNCTIONS
52 ■ INTRODUCTION TO QUARTUS II ALTERA CORPORATION
Instantiating Megafunctions in EDA
Tools
You can use Altera-provided megafunctions, LPM functions, and IP
functions in EDA design entry and synthesis tools. You can instantiate
megafunctions in EDA tools by creating a black box for the function, by
inference, or by using the clear box methodology.
Using the Black Box Methodology
You can use the MegaWizard Plug-In Manager to generate Verilog HDL or
VHDL wrapper files for megafunctions. For Verilog HDL designs, the
MegaWizard Plug-In Manager also generates a Verilog Design File that
contains a hollow-body declaration of the module, used to specify port
directions.
The Verilog HDL or VHDL wrapper file contains the ports and parameters
for the megafunction, which you can use to instantiate the megafunction in
the top-level design file as well as a sample instantiation file and then direct
the EDA tool to treat the megafunction as a black box during synthesis.
The following steps describe the basic flow for using the MegaWizard
Plug-In Manager to create a black box for an Altera megafunction or LPM
function in EDA design entry and synthesis tools:
1. Use the MegaWizard Plug-In Manager to create and parameterize the
megafunction or LPM function.
2. Use the black box file or component declaration (along with the sample
instantiation file) generated by the MegaWizard Plug-In Manager to
instantiate the function in the EDA synthesis tool.
3. Perform synthesis and optimization of the design in the EDA synthesis
tool. The EDA synthesis tool treats the megafunction as a black box
during synthesis.