Altera's Stratix® III and Stratix IV FPGA families have dedicated high-performance digital signal processing (DSP) blocks optimized for DSP applications. This template shows examples of how to infer DSP blocks with different features from Verilog HDL code in Stratix III and Stratix IV devices.
Each of the following DSP operations (with resource utilized in the examples) fits into one DSP block 18-bit element:
- Four multiplier adder
- Four multiplier accumulator
- Four multiplier adder with shift registered input
- Complex multiplication
- Eight multiplier adder with output adder chain
In addition, when register packing occurs for any of these DSP operations, no extra logic cells are required for the registers.
Download the files used in this example:
The use of this design is governed by, and subject to, the terms and conditions of the Altera® Hardware Reference Design License Agreement.
Files in the zip download include:
- four_mult_add - folder contains the Quartus® II development software project and source file for the four multiplier adder example
- four_mult_accum - folder contains the Quartus II project and source file for the four multiplier accumulator example
- four_mult_add_shift_register_input - folder contains the Quartus II project and source file for the four multiplier adder with shift registered input example
- complex_mult - folder contains the Quartus II project and source file for the complex multiplication example
- sum_of_eight_adder_chain - folder contains the Quartus II project and source file for the eight multiplier adder with output adder chain example
Related Links
- Stratix III Device Handbook Vol. 1 Chapter 5: DSP Blocks in Stratix III Devices (PDF)
- Stratix IV Device Handbook Vol. 1 Chapter 4: DSP Blocks in Stratix IV Device (PDF)
- Quartus II Handbook Vol. 1 Chapter 6: Recommended HDL Coding Styles (PDF)
Design Examples Disclaimer
These design examples may only be used within Altera devices and remain the property of Altera Corporation. They are being provided on an “as-is” basis and as an accommodation; therefore, all warranties, representations, or guarantees of any kind (whether express, implied, or statutory) including, without limitation, warranties of merchantability, non-infringement, or fitness for a particular purpose, are specifically disclaimed. Altera expressly does not recommend, suggest, or require that these examples be used in combination with any other product not provided by Altera.
