Transcription of Understanding DRAM Operation
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Understanding DRAM Operation
Applications NoteUnderstanding DRAM Operation12/96 Page 1 OverviewDynamic Random Access Memory (DRAM) devicesare used in a wide range of electronics they are produced in many sizes and soldin a variety of packages, their overall Operation isessentially the are designed for the sole purpose of storingdata. The only valid operations on a memory deviceare reading the data stored in the device, writing (orstoring) data in the device, and refreshing the dataperiodically. To improve efficiency and speed, anumber of methods for reading and writing the mem-ory have been document describes basic asynchronousDRAM Operation , including some of the most com-monly used features for improving DRAM perfor-mance. While many aspects of a synchronousDRAM are similar to an asynchronous DRAM, syn-chronous Operation differs because it uses a clockedinterface and multiple bank architecture. Additionalinformation regarding specific features and designissues may be found in the Applications ArchitectureDRAM chips are large, rectangular arrays of mem-ory cells with support logic that is used for readingand writing data in the arrays, and refresh circuitry tomaintain the integrity of stored ArraysMemory arrays are arranged in rows and columns ofmemory cells called wordlines and bitlines, respec-tively.
interface and multiple bank architecture. Additional ... A DRAM memory cell is a capacitor that is charged to produce a 1 or a 0. Over the years, several differ- ... control signal is used to prevent data from appearing at the output until needed. When OE is low, data
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