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AR# 62977

Ultrascale GTH/GTY SATA COMINIT/COMAWAKE burst numbers are higher by 1

Description

In Vivado 2014.4 and earlier, the UltraScale FPGA Transceivers Wizard sets  "Number of bursts in a COM sequence for SATA" to 6 which results in 7 bursts on hardware.
 
The SATA specification requires only 6 bursts. 

This settings can result in linkup failure on the RX side. 

Solution

The "Number of bursts in a COM sequence for SATA" settings in the wizard corresponds to N+1 number of bursts in the COM sequence.
 
The default value of 6 results in 7 bursts on hardware.
 

Table 3-40 of Transceivers User Guide UG576 and UG578 will be updated to reflect the above change.

The Vivado 2015.1 UltraScale Transceivers Wizard will set "Number of bursts in a COM sequence for SATA" to 5.  
AR# 62977
Date Created 11/30/2014
Last Updated 12/08/2014
Status Active
Type General Article
Devices
  • Virtex UltraScale
  • Kintex UltraScale
Tools
  • Vivado Design Suite - 2014.4
IP
  • UltraScale FPGA Transceiver Wizard