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AR# 65290

Transceivers wizard V3.5 - Does Artix-7 GTP support 4-byte comma alignment?

Description

The 7 series transceivers wizard for GTP allows me to select four byte boundaries for the "Align to" option in the Comma Alignment and Equalization tab.

Do GTP transceivers support 4-byte comma alignment?

Solution

No, a Four byte boundaries value is not valid for the "Align to" option for GTP transceivers.

As per the GTP transceivers user guide Figure 4-30, 1 and 2 are the only values supported for ALIGN_COMMA_WORD.

http://www.xilinx.com/support/documentation/user_guides/ug482_7Series_GTP_Transceivers.pdf

Even though the transceivers wizard allows selection of Four byte boundaries in the "Align to" option during synthesis of the IP, the tool will produce the below critical warning indicating that a value of 4 is incorrect.

[Netlist 29-72] Incorrect value '4' specified for property 'ALIGN_COMMA_WORD'. Expecting type 'int' with possible values of '1,2'. The system will either use the default value or the property value will be dropped. Please verify your source files.

In v3.6 of the transceivers wizard, the GUI is fixed so that the four byte boundaries option is not shown in the drop down menu of the "Align to" option for GTP transceivers.

AR# 65290
Date Created 08/25/2015
Last Updated 09/08/2015
Status Active
Type General Article
Devices
  • Artix-7
Tools
  • Vivado Design Suite - 2015.2
IP
  • 7 Series FPGAs Transceivers Wizard