Intel® Quartus® Prime Standard Edition User Guide: Design Optimization

ID 683230
Date 11/12/2018
Document Table of Contents Modes of Operation

LUTs in an LE can operate in either normal or arithmetic mode.

When an LE is configured in normal mode, the LUT in the LE can implement a function of four inputs.

When the LE is configured in arithmetic mode, the LUT in the LE is divided into two 3-input LUTs. The first LUT generates the signal that drives the output of the LUT, while the second LUT generates the carry-out signal. The carry-out signal can drive only a carry-in signal of another LE.

For more information about LE modes of operation, refer to volume 1 of the appropriate device handbook.