ROM consist of __________a)NOR and OR arraysb)NAND and NOR arraysc)NAN...
ROM consists of NAND and OR arrays which can be programmed by the user to implement combinational & sequential functions. Combinational Operations like that of adders and subtractors and Sequential Functions like that of storing in the memory.
ROM consist of __________a)NOR and OR arraysb)NAND and NOR arraysc)NAN...
ROM consist of NAND and OR arrays
Explanation:
ROM stands for Read Only Memory. It is a type of computer memory that is non-volatile, meaning the stored data is retained even when the power is turned off. ROM is used to store permanent or semi-permanent data that cannot be modified or erased by normal computer operations.
Structure of ROM:
ROM consists of memory cells organized in an array. Each memory cell can store a bit of information, which is represented by a voltage level. The memory cells are connected in a matrix-like structure, with rows and columns. The intersections of the rows and columns are known as address lines, and they are used to select a particular memory cell.
ROM Array:
The ROM array is made up of two types of logic gates: NAND gates and OR gates. These gates are used to implement the desired logic functions for the ROM.
NAND Array:
The NAND array is responsible for implementing the decoding function in ROM. It takes the address inputs and generates the appropriate row select signals. The NAND gates are connected in such a way that they form a decoder, which converts the binary address inputs into a one-hot code. This one-hot code is used to select the desired row in the ROM array.
OR Array:
The OR array is responsible for implementing the data storage function in ROM. It takes the selected row from the NAND array and generates the output data. The OR gates are connected to the memory cells in each column, and they combine the outputs of the memory cells to produce the final output data.
Working:
When a specific address is given as input to the ROM, the NAND array decodes the address and selects the corresponding row. The OR array then retrieves the data from the selected row and provides it as the output.
Conclusion:
In summary, ROM consists of NAND and OR arrays. The NAND array is used for address decoding, while the OR array is used for data storage. This combination of logic gates allows ROM to store and retrieve data in a controlled and predictable manner.