Ramaxel Technology LimitedRamaxel Technology LimitedConfidentialDRAMDRAM工作原理工作原理Ramaxel Technology LimitedRamaxel Technology LimitedConfidentialDynamic Random Access MemoryEach cell is a capacitor+a transistorVery small sizeSRAM uses six transistors per cellDivided into banks,rows&columnsEach bank can be independently controlledDRAMRamaxel Technology LimitedRamaxel Technology LimitedConfidentialMain MemoryEverything that happens in the computer is resident in main memoryCapacity:around 100 Mbyte