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AR# 44374

13.x 7 Series - ERROR:Place:1415 - Is it possible to drive an MMCM by IBUFDS_GTE2 in a different clock region?

Description

In Virtex-6 FPGA, it was possible to drive an MMCM directly from the IBUFDS_GTE2. Is this true for 7 series architecture as well?

Solution

This depends on the device being used.

For Virtex-7 FPGA, it is possible as the MMCM is located within the same Clock Region as the IBUFDS_GTE2.

However, for Kintex-7 FPGA it is impossible to drive the MMCM directly as MMCM and IBUFDS_GTE2 are located in different Clock Regions. In order to drive the MMCM from an IBUFDS_GTE2, a BUFMR or BUFG needs to be inserted.
AR# 44374
Date Created 12/06/2011
Last Updated 12/15/2012
Status Active
Type General Article
Devices
  • Kintex-7
  • Virtex-7