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Visitor
danielreidal
Posts: 8
Registered: ‎10-29-2008
0

QDR 2burst vs 4burst

Hi! I'm trying to figure out the difference between 2 and 4 burst QDRII memories. I can se the difference inte the timing diagrams but I can not figure out how that affects my design. Anyone that can help me? Cheers Daniel
Xilinx Employee
jschmitz
Posts: 408
Registered: ‎10-23-2007
0

Re: QDR 2burst vs 4burst

With burst 2, you get or put 2 data words per read or write command.  With burst 4, you get or put 4.  Burst 4 is usually capable of running a little faster than burst 2 as far as frequency of operation.  In some applications you might be able to use either part.  In others you might want the quicker random access of the burst 2.