sdram burst length
Burst length referes to the amount of data read/written after a read/write command is presented to the DDR/SDRAM/QSDRAM.....controller.
This effectively reduces the latency for r/w operations
Differenciating to the older DRAM's,
Suppose we need to 8 words from memory
In normal dram after a read command is given the data fetch time is say 1ns, so it will take 8ns and 8 read commands for complete operation
But for a SDRAM, the first command will take 1 ns and further reads dont need a read command since its mentioned as burst of 8 it will read the remaining 7 words in say each at .5ns and finally we have 8 data at 4.5ns with only one read operation
So burst operation reduces latency when accesing consecutive memory locations
others a burst size of 1 is like normal r/w operation