Types and Hierarchy of Memory
Michael
2018-02-10 19:05
A20180206001
Electrical memory means a memory that is electrically written and electrically read. All electronic products must use memory, so memory may be called a “strategic commodity.”
(Coauthor：Hightech)
Random Access Memory (RAM)
Michael
2018-02-28 12:40
A20180206002
Random Access Memory required time for data reading or writing of memory is not related to the position where the data is located. When the power is turned off, data will be immediately disappeared.
(Coauthor：Hightech)
Dynamic RAM (DRAM)
Michael
2018-02-10 19:16
A20180206003
Dynamic RAM employs one transistor plus one capacitor for storing one bit of data, and requires for periodically supplying power during usage to maintain the content of memory, so called "Dynamic."
(Coauthor：Hightech)
Ferroelectric RAM (FRAM)
Michael
2018-02-10 19:22
A20180206004
Ferroelectric RAM (FRAM) was a structure first announced by Ramtron International Corp., a USA company. Currently, the capacity of FRAM has already increased to above 256 MB or more.
(Coauthor：Hightech)
Magnetic RAM (MRAM)
Michael
2018-02-25 20:12
A20180210001
The structure of MRAM is totally different from the ordinary electric storage device that the data may still be kept after power-off. MRAM belongs to non-volatile memory and has all the advantages.
(Coauthor：Hightech)
Resistive RAM (RRAM)
Michael
2018-02-25 20:14
A20180210002
Resistive RAM (RRAM) is that a special insulation material is sandwiched between upper layer electrode and lower layer electrode, wherein the electric resistance of insulation material.
(Coauthor：Hightech)
Phase Change RAM (PCRAM)
Michael
2018-02-25 20:16
A20180210003
Phase Change RAM (PCRAM) is also called "Ovonic Unified Memory (OUM)". PCRAM belongs to non-volatile memory that the data may still be kept after power-off.
(Coauthor：Hightech)
Read Only Memory (ROM)
Michael
2018-02-10 18:11
A20180210004
Read Only Memory (ROM) can only read data but cannot write data during usage, and the data still exists after power-off. ROM can be categorized to four types: Mask-ROM, P-ROM, EP-ROM and EEP-ROM.
(Coauthor：Hightech)
