Configuring a DSP48E or DSP48E1 function involves the following steps:

  1. Configuring the functionality of the slice, including the multiplier, pre-adder (DSP48E1 only), adder-subtractor or logic unit, and pattern detector
  2. Adjusting the length of the internal combinatorial path by adding or removing internal registers
  3. Deciding which block diagram terminals to show
  4. Ensuring the precision of these terminals
  5. Viewing the latencies of internal data paths

The following topics provide supplementary information:

  • Caveats for using these functions
  • Shrinking the functions' icons
  • Determining the maximum number of DSP48E or DSP48E1 functions you can use
  • Replacing a DSP48E function with a DSP48E1 function and vice versa

Tutorials

Refer to the DSP48E Example: Creating a Complex Multiplier and DSP48E Example: Creating an n-Tap FIR Filter tutorials to familiarize yourself with these functions.