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AR# 62651

MIG 7 Series - Will the memory controller reorder commands based on AXI ID tags?


AXI4 protocol allows for the ability to support out of order transactions by using AXI ID signals to create "threads". 

Ordering must be maintained within a "thread", but there is no guarantee of ordering with separate threads.

If a master issues reads to the DDR3 controller which have different ID tags, will the DDR3 controller ever respond "out of order" to the reads requests?


The MIG AXI shim will not reorder commands based on the AXI ID value. 

MIG will always respond to requests in the order in which they were received.

Revision History:
1/16/2015 - Initial Release
AR# 62651
Date Created 10/29/2014
Last Updated 03/18/2015
Status Active
Type General Article
  • Kintex-7
  • Virtex-7
  • MIG 7 Series