Stratix® V Device Handbook: Volume 1: Device Interfaces and Integration

ID 683665
Date 10/18/2023
Document Table of Contents

3.4.2. Internal Coefficient and Pre-Adder

Mode Stratix® V

The coefficient feature must be enabled when the pre-adder feature is enabled.


The coefficient feature and pre-adder feature can be used independently.

With pre-adder enabled:

  • If the multiplicand input comes from dynamic input due to input limitations—the input data width is restricted to 22 bits.
  • If the multiplicand input comes from the internal coefficients—the data width of the multiplicand is 27 bits.
Note: When you enable the pre-adder feature, all input data must have the same clock setting.