PHYS-P 150 Lecture Notes - Lecture 31: Static Random-Access Memory, Magnetic Storage, Flash Memory
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Random access memory: storage for apps that are currently running. Also the storage that includes everything saved when your phone is turned off: this is flash memory. Magnetic disk storage slower than silicon memory: however, magnetic disk storage is cheaper and has greater overall capacity. Optical discs: not as high of a capacity as magnetic storage, more permanent, however. Information that is needed quickly (actions are currently being processed in the apps: ex: the one that you are using on your phone. Uses ram: random access memory: any byte can be provided to the user when necessary. Ram needs continuous power to function properly. Two main types: dram: dynamic ram, sram: static ram. Used for operating and for the app that is up on the screen. Data is stored in presence or absence of a capacitor: presence or access of charge on the capacitor. If there is a charge, electrons vacate the capacitor and current is shown.
