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AR# 67303

DSP Slice - Vivado Placer - CRITICAL WARNING: [Route 35-278] Unroutable pin detected. Term [588131] dsp_check_ok[88]_i_3/I2 is mapped to DSP48E2_X2Y359.PCOUT47. The site pin has no connectivity in the device

Description

I am receiving the following warning with Vivado Placer:

CRITICAL WARNING: [Route 35-278] Unroutable pin detected. Term [588131] dsp_[11]_i_1/I2 is mapped to DSP48E2_X2Y359.PCOUT47. The site pin has no connectivity in the device

Solution

This error usually happens if the DSP is placed at the top of a column.  In this case there are no physical connections to an adjacent DSP slice.

Another potential cause could be if you are trying to connect a PCOUT to a fabric component instead of another DSP Slice. The P ouptut should be used if you need to connect to fabric.

This is not a valid connection as the PCOUT is a dedicated cascade that can only connect to the PCIN of an adjacent DSP Slice.

AR# 67303
Date Created 05/31/2016
Last Updated 06/03/2016
Status Active
Type General Article
Tools
  • Vivado Design Suite - 2016.1