UPGRADE YOUR BROWSER

We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!
  1. Xilinx - Adaptable. Intelligent.
  2. Support
  3. AR# 53524: Vivado Synthesis - Does Vivado Synthesis merge multiple registers that are declared separately and used as the output register bus of a DSP48?

AR# 53524

Vivado Synthesis - Does Vivado Synthesis merge multiple registers that are declared separately and used as the output register bus of a DSP48?

Description

Does Vivado Synthesis merge multiple registers that are declared separately and used as the output register bus of a DSP48?

Solution

Vivado Synthesis does not support merging registers into the DSP48 if multiple registers are declared separately and are used as the output register bus of a DSP48.

To work around this issue, declare the registers as one register bus rather than declaring them separately.

AR# 53524
Date 04/16/2014
Status Active
Type Known Issues
Tools
Page Bookmarked