Xilinx V2.1 User Manual

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Gateway Out.........................................................................................................99

Quantization Error Blocks ....................................................................................101

Display .................................................................................................................101

Memory .....................................................................................................................102

Dual Port RAM .....................................................................................................102

FIFO ....................................................................................................................106

ROM ....................................................................................................................107

Single Port RAM ..................................................................................................110

State Machine ...........................................................................................................114

Mealy State Machine ...........................................................................................114

Moore State Machine ..........................................................................................116

Registered Mealy State Machine .........................................................................119

Registered Moore State Machine ........................................................................123

Chapter 4

System Generator Software Features

Using the System Generator installer .......................................................................127

Uninstalling previous System Generator directories ............................................127

Installed System Generator directory ..................................................................128

Using Black Boxes ....................................................................................................128

Example model ....................................................................................................128

Black Box window ................................................................................................129

Use of mixed language projects ...............................................................................130

Incorporating mixed language black boxes .........................................................130

Tips for creating a high performance design ............................................................132

Using the System Generator Constraints Files..........................................................133

System Clock Period ............................................................................................133

Multicycle Path Constraints ..................................................................................133

IOB Timing and Placement Constraints ...............................................................134

Example for showing constraints use ...................................................................134

Important Issues ...................................................................................................136

Files automatically created by System Generator ....................................................137

Chapter 5

Using the Xilinx Software

Xilinx ISE 4.1i Project Navigator ...............................................................................139

Opening a System Generator project ..................................................................139

Customizing your System Generator project .......................................................139

Implementing your design ...................................................................................140

Simulating using ModelSim within the Project Navigator ....................................141

Using an EDIF software flow ....................................................................................143

Simulation .................................................................................................................143

Compiling your IP ................................................................................................143

Associating ModelSim with ISE 4.1i Project Navigator ........................................144

Xilinx software tools resources .................................................................................145

Chapter 6

Auxiliary Files

Demonstration designs ..............................................................................................146

Perl scripts .................................................................................................................147

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