 # Electronics Engineering Objective Questions { Digital Circuit and Microprocessor }

372. The number of memory cycles required to execute the following 8085 instructions (I) LDA 3000 H,LXI D, FOF 1 H,would be

373. In the modulo-6 ripple counter shown in the given figure 7.27, the output of the 2-input gate is used to clear the J-K flip-flops. Oodc inputFig. 7.27 The 2-input gate is

374. Consider the sequence of 8085 instructions given below. LXI H, 9258, MOV A, M, CMA, MOV M,A Which one of the following is performed by this sequence?

375. A Boolean function f of two variables x and y id defined as follows :f(0,0) =f(0,1) = j(1,1) = 1;f(1,0) = 0 Assuming complements of x and y are not available, a minimum cost solution for realizing f using only 2-input NOR gates and 2-input OR gates (each having unit cost) would have a total cost of

376. It is desired to multiply the numbers OAH by OBH and store the result in the accumulator. The numbers are available in registers B and C respectively. A Part of the 8085 program for this purpose is given below :MVIA,00H,Loop;,LILT END,The sequence of instruction to the complete the program would be

377. Decimal 43 in Hexadecimal and BCD number system is respectively

378. The Boolean function f implemented in the rgure 7.28 using two input multiplexers is

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