Information about Memory Refresh
Memory refresh is the process of periodically reading information from an area of computer memory, and immediately rewriting the read information to the same area with no modifications. Each memory refresh cycle refreshes a succeeding area of memory. Memory refresh is most often associated with modern dynamic random access memory. However, several early computer memory technologies also required periodical processes similar in purpose. These technologies include delay line memory and Williams tube.
Compare with magnetic core memory where each memory cell needs to be refreshed after being read, but periodical refreshes are not necessary. Also, see static random access memory which is used in similar applications as dynamic random access memory, but does not require refreshing (hence labelled static as opposed to dynamic).
Compare with magnetic core memory where each memory cell needs to be refreshed after being read, but periodical refreshes are not necessary. Also, see static random access memory which is used in similar applications as dynamic random access memory, but does not require refreshing (hence labelled static as opposed to dynamic).
Computer data storage, computer memory, and often casually storage or memory refer to computer components, devices and recording media that retain digital data used for computing for some interval of time.
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DRAM types
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- FPM RAM
- EDO RAM
- Burst EDO RAM
- SDRAM
- SDR SDRAM
- DDR SDRAM
- DDR2 SDRAM
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Delay line memory was a form of computer memory used on some of the earliest digital computers. Like many modern forms of electronic computer memory, delay line memory was a refreshable memory, but as opposed to modern random access memory, delay line memory was serial
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The Williams tube or (more accurately) the Williams-Kilburn tube (after Freddie Williams and co-worker Tom Kilburn), developed about 1946 or 1947, was a cathode ray tube used to electronically store binary data.
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Magnetic core memory, or ferrite-core memory, is an early form of computer memory. It uses small magnetic ceramic rings, the cores, to store information via the polarity of the magnetic field they contain.
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Static random access memory (SRAM) is a type of semiconductor memory. The word "static" indicates that the memory retains its contents as long as power remains applied, unlike dynamic RAM (DRAM) that needs to be periodically refreshed (nevertheless, SRAM should not be
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