Download altmult_add Megafunction User Guide

Contents
About this User Guide .............................................................................. v
Revision History ........................................................................................................................................ v
How to Contact Altera .............................................................................................................................. v
Typographic Conventions ...................................................................................................................... vi
Chapter 1. About this Megafunction
Device Family Support .........................................................................................................................
Introduction ............................................................................................................................................
Features ...................................................................................................................................................
General Description ...............................................................................................................................
Common Applications ....................................................................................................................
Resource Utilization and Performance ...............................................................................................
1–1
1–1
1–1
1–1
1–4
1–5
Chapter 2. Getting Started
Software and System Requirements ................................................................................................... 2–1
MegaWizard Plug-In Manager Customization ................................................................................. 2–1
MegaWizard Page Descriptions .......................................................................................................... 2–1
Inferring Megafunctions from HDL Code .................................................................................... 2–8
Instantiating Megafunctions in HDL Code ....................................................................................... 2–9
Identifying a Megafunction after Compilation ................................................................................. 2–9
Simulation ............................................................................................................................................. 2–10
Quartus II Simulator ...................................................................................................................... 2–10
EDA Simulation .............................................................................................................................. 2–10
SignalTap II Embedded Logic Analyzer .......................................................................................... 2–11
Design Example: Complex Multiplication ....................................................................................... 2–11
Design Files ..................................................................................................................................... 2–11
Example 1 .............................................................................................................................................. 2–11
Generate a 9 × 9-Bit Multiplier/Adder (the Real Expression) ................................................. 2–12
Generate a 9 x 9-Bit Multiplier/Adder (the Imaginary Expression) ...................................... 2–21
Combine real_mult and image_mult to Create a Complex Multiplier .................................. 2–27
Implement the 9 × 9 Complex Multiplier Design ...................................................................... 2–29
Functional Results—Simulate the Complex Multiplier Design .............................................. 2–31
Timing Results ................................................................................................................................ 2–33
Simulate the Complex Multiplier Design in ModelSim-Altera ............................................... 2–35
Design Example: Implementing a Simple FIR Filter ...................................................................... 2–37
Design Files ..................................................................................................................................... 2–38
Example 2 .............................................................................................................................................. 2–38
Generate a 4-Tap FIR Filter ........................................................................................................... 2–38
Implement the FIR 4-Tap Design ................................................................................................. 2–48
Functional Results—Simulate the FIR 4-Tap Design ................................................................ 2–50
Timing Results ................................................................................................................................ 2–52
Altera Corporation
iii