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AR# 64012

Synchronous gearbox normal (non-CAUI) usage for 128-bit fabric interface (64-bit internal) UltraScale GTY

Description

Currently the User Guide only states that RXDATAVALID[1] and RXHEADERVALID[1] are used for synchronous gearbox in CAUI mode only.

This is not correct as these signals are now overloaded and used in normal synchronous gearbox (non-CAUI) mode when the GT is configured for 128-bit fabric interface and 64-bit internal data width. 

Solution

The User Guide will be updated to direct the user to consume both bits of RXDATAVALID[1:0] and RXHEADERVALID[1:0] when using the synchronous gearbox in normal (non-CAUI) mode when the GTY is configured for 128-bits fabric interface and 64-bit internal width. 

RXDATAVALID[1:0] RXDATA[127:64] RXDATA[63:0]
2'b11 VALID VALID
2'b10 VALID INVALID
2'b01 INVALID VALID
2'b00 INVALID INVALID
 
AR# 64012
Date Created 03/23/2015
Last Updated 04/09/2015
Status Active
Type General Article
Devices
  • Virtex UltraScale