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AR# 66172

Tactical Patch Request - 2015.4 - Inverted and non-inverted LUTRAMs placed in same site

Description

In Vivado 2015.4, LUTRAMs such as two RAM32Ms can be placed into the same SLICE even though they have different clock inversion properties (IS_WCLK_INVERTED=1 compared to IS_WCLK_INVERTED=0).

This is an illegal placement and can lead to functional issues.

Solution

Expectation with the patch installed:

The placement results should not include two LUTRAMs with different inversions in the same SLICE.

Expectation without the patch installed:

An illegal placement is possible.

Attachments

Associated Attachments

Name File Size File Type
AR66172_vivado_2015_4_preliminary_rev1.zip 6 MB ZIP
AR# 66172
Date Created 12/09/2015
Last Updated 01/12/2016
Status Active
Type General Article
Tools
  • Vivado Design Suite - 2015.4