AR# 34196

SPI-3 Link Layer v6.1/v7.1 - "ERROR:PhysDesignRules:1997 - The computed value for the VCO operating frequency of MMCM_ADV..."

描述

In ISE design tools 11.4.1 and later, when using the SPI-3 Link Layer v6.1 or v7.1 Core targeting a Virtex-6 device, an error similar to the following might occur in MAP:

"ERROR:PhysDesignRules:1997 - The computed value for the VCO operating frequency of MMCM_ADV instance rfmmcm is calculated to be 415.999983 MHz. This falls below the operating range of the MMCM VCO frequency for this device of 600.000000 - 1200.000000 MHz. Please adjust either the input frequency CLKINx_PERIOD, multiplication factor CLKFBOUT_MULT_F or the division factor DIVCLK_DIVIDE, in order to achieve a VCO frequency within the rated operating range for this device.
ERROR:PhysDesignRules:2063 - A CLKFBOUT_MULT_F setting of 4.0 for MMCM_ADV (block rfmmcm) cannot be supported at this time.
ERROR:PhysDesignRules:1997 - The computed value for the VCO operating frequency of MMCM_ADV instance tfmmcm is calculated to be 415.999983 MHz. This falls below the operating range of the MMCM VCO frequency for this device of 600.000000 - 1200.000000 MHz. Please adjust either the input frequency CLKINx_PERIOD, multiplication factor CLKFBOUT_MULT_F or the division factor DIVCLK_DIVIDE, in order to achieve a VCO frequency within the rated operating range for this device.
ERROR:PhysDesignRules:2063 - A CLKFBOUT_MULT_F setting of 4.0 for MMCM_ADV (block tfmmcm) can not be supported at this time.
ERROR:Pack:1642 - Errors in physical DRC."

解决方案

To resolve this issue, please modify the MMCM attributes as described in (Xilinx Answer 33589).

链接问答记录

相关答复记录

Answer Number 问答标题 问题版本 已解决问题的版本
34019 ISE Design Suite 11.4.1 - Known Issues for Virtex-6 FPGA Service Pack N/A N/A
AR# 34196
日期 12/15/2012
状态 Active
Type 综合文章