Main Memory Terms DRAM - Dynamic Random Access Memory Unlike SRAM, data must be written back after being read. DRAM requires that the data be refreshed periodically. Access time - time between when a read is requested and the desired word arrives Cycle time - minimum time between requests to memory Row Access Strobe (RAS) - half the address is sent first here Column Access Strobe (RAS) - next half of the address is sent

Chapter 7: Large and Fast: Exploiting Memory Hierarchy - 29 of 67