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87. Which of the following best describes static memory devices?
(a) memory devices that are magnetic in nature and do not require constant refreshing
(b) memory devices that are magnetic in nature and require constant refreshing
(c) semiconductor memory devices in which stored data will not be retained with the power applied unless constantly refreshed
(d) semiconductor memory devices in which stored data is retained as long as power is applied
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- Electronics Engineering » Notes » Memory Devices 1. All memory devices store binary logic levels (1s and 0s) in an array structure. The size of each binary word (number of bits) that is stored varies depending on the memory device. These binary values are referred to as data. 2. The place (location) in the memory device where any data value is stored is identified by another binary number referred to as an address.Each memory location has a unique address. 3. All memory devices operate in the same general way. To write data in memory, the address to be accessed is placed on the address input, the data value to be stored is applied to the data inputs, and the control signals are manipulated to store the data.To read data from memory, the address is applied, the control signals are manipulated, and the data value appears on the output pins. 4. Memory devices are often used along with a microprocessor CPU that generates the addresses and control signals and either provides the data to be stored or uses the data from the memory. Reading and writing are alwaysdone from the CPU’s perspective.Writing puts data into the memory, and reading gets data out of the memory. 5. Most read-only memories (ROMs) have data entered one…