Avnet Employee
Posts: 2
Registered: ‎12-04-2009

What is the Latency on Write and a Read using the MCB to DDR3 / LPDDR ?

The CAS latency is automatically set by MIG, depending on the part and timing requested.  This can range anywhere from 2 to 10.  For the 800 Mbps DDR3 example from the XFest presentation, the resulting design has a CAS Read Latency of 7 and a Write Latency of 5.  You find these settings in the memc3_wrapper.vhd file.