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The most common type of non-volatile memory is the ROM device. This device is read only and the data is masked into the chip during manufacture. Variations of the ROM are one off programmable ones (PROM), erasable ones (EPROM) using UV light, electrical erasable ones (EEPROM). These devices allow the user to blow them with programs and re-program if incorrect. As engineers we will often use the EPROM version, the pinning details are shown below
The internal structure of the EPROM is similar the SRAM, but does not require a write pin; it employs light sensitive fuses to hold the data.
The actual device has a window in it, this enables the device to be cleaned using UV light, usually this window is covered up to prevent slow eraser by normal light.
The heart of a computer is often one integrated circuit; one typical circuit is a 68Hc11 Microprocessor. Let us consider a typical 68Hc11 hardware design. The mic
What is a SAP system? The union of all s/w components that are assigned to the similar databases is known as a SAP system.
In a simple paging system, what information is stored in a typical Look-aside Buffers TLB table entry? A classical TLB table entry contains page# and frame#, while a logical
Explain bit pair recoding with an example? Ans: Bit pair recoding halves the maximum number of summands. Group the Booth-recoded multiplier bits in pairs and see the following
When we initialize the form at that time if we require to set any variable's value then we can set it by defining in constructor. Constructor's name always similar as class name an
What are the differences between user level threads and kernel supported threads? A thread, sometimes termed a lightweight process (LWP), is a fundamental unit of CPU utilizati
Q. If a plane is in the air also there is a fly flying inside the plane does the plane get heavier when the fly lands? Answer:- It is true that a fly puts weight on a plan
What is 'inode'? All UNIX files have its description kept in a structure called 'inode'. The inode have info about the file-size, its location, time of last access, time of las
Q. What do you mean by Decoders? Decoder transforms one kind of coded information to other form. A decoder has n inputs and one enable line (sort of selection line) and 2 n ou
Instruction Cycle The instruction cycle consists of a series of steps needed for the implementation of an instruction in a program. A typical instruction in a program is descri
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