2. 技术支持
  3. AR# 4213: V1.5, V1.4 CORE Generator - Your directory path <directory_path> should not contain any directory names longer than 8 characters.
  4. AR# 42131: Virtex-6 FPGA GTH Transceivers - Incorrect Attribute Settings Could Affect Performance

AR# 42131

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Virtex-6 FPGA GTH Transceivers - Incorrect Attribute Settings Could Affect Performance

描述

The Virtex-6 FPGA GTH Transceiver wizard and IBERT has the SLICE_NOISE_CTRL_x attributes set incorrectly. This answer record discusses what the implications are and what the correct settings should be.

解决方案

IBERT and v1.8 of the Virtex-6 FPGA GTH Transceiver Wizard are currently setting the SLICE_NOISE_CTRL_x attributes to incorrect values as follows:

SLICE_NOISE_CTRL_0_LANE01 => 5007h
SLICE_NOISE_CTRL_2_LANE01 => EFFFh
SLICE_NOISE_CTRL_2_LANE23 => EFFFh

Updating these attributes to the correct values (as shown below) can provide a potential upside to the RX margin on some heavily utilized designs, but the majority of the designs will see no impact.

However, it is still recommended to update these attributes to the correct settings and updating them should not result in any negative impact.

This has been updated in the Virtex-6 GTH Transceiver wizard and IBERT in the ISE 13.2 release.

SLICE_NOISE_CTRL_0_LANE01 => 0000h
SLICE_NOISE_CTRL_2_LANE01 => 7FFFh
SLICE_NOISE_CTRL_2_LANE23 => 7FFFh

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
38596 Virtex-6 FPGA GTH Transceiver - Known Issues and Answer Records List N/A N/A
AR# 42131
日期 04/20/2021
状态 Active
Type 综合文章
器件
IP
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