AR# 61790

7 Series MIG - DDR3 - app_rd_data_end stays high

Description

Version Found: MIG 7 Series v2.1
Version Resolved: See (Xilinx Answer 54025)

After toggling a number of times, app_rd_data_end may become stuck high as shown in the example design simulation below:

app_rd_data_end.PNG


Solution

With controllers using a 4:1 PHY to controller clock ratio, app_rd_data_end is always asserted high along with app_rd_data_valid.

Hence this signal is not needed for user logic and can be ignored. 

For 2:1 controllers, app_rd_data_end does toggle properly on the second word returned on app_rd_data.



Revision History

11/24/2014 - Initial Release


Linked Answer Records

Master Answer Records

Answer Number Answer Title Version Found Version Resolved
54025 MIG 7 Series - IP Release Notes and Known Issues for Vivado N/A N/A
AR# 61790
Date 01/09/2015
Status Active
Type Known Issues
IP