Digital Electronics
Sequential Circuits
Marks 1Marks 2Marks 5
Microprocessor
Marks 1Marks 2Marks 3
Boolean Algebra
Marks 1Marks 2
Analog to Digital and Digital to Analog Converter
Marks 1Marks 2
Combinational Circuits
Marks 1Marks 2Marks 5
Minimization
Marks 2
Logic Families and Memories
Marks 1Marks 2
Logic Gates
Marks 1Marks 2
1
GATE EE 2023
Numerical
+2
-0

In a given 8-bit general purpose micro-controller there are following flags.

C-Carry, A-Auxiliary Carry, O-Overflow flag, P-Parity (0 for even, 1 for odd)

R$$_0$$ and R$$_1$$ are the two general purpose registers of the micro-controller.

After execution of the following instructions, the decimal equivalent of the binary sequence of the flag pattern [CAOP] will be _________.

MOV R0, +0x60

MOV R1, +0x46

ADD R0, R1

Your input ____
2
GATE EE 2014 Set 2
MCQ (Single Correct Answer)
+2
-0.6
In an $$8085$$ microprocessor, the following program is executed GATE EE 2014 Set 2 Digital Electronics - Microprocessor Question 4 English

At the end of program, register $$A$$ contains

A
$$60H$$
B
$$30H$$
C
$$06H$$
D
$$03H$$
3
GATE EE 2014 Set 1
MCQ (Single Correct Answer)
+2
-0.6
An output device is interfaced with $$8$$ bit microprocessor $$8085$$$$A.$$ The interfacing circuit is shown in figure GATE EE 2014 Set 1 Digital Electronics - Microprocessor Question 5 English

The interfacing circuit makes use of $$3$$ line to $$8$$ line decoder having $$3$$ enable lines $${E_1}\,\,\overline E {}_2,$$ $$\,\overline E {}_3$$. The address of the device is

A
$${50_H}$$
B
$${5000_H}$$
C
$${A0_H}$$
D
$${A000_H}$$
4
GATE EE 2011
MCQ (Single Correct Answer)
+2
-0.6
A portion of the main program to call a subroutine $$SUB$$ in an $$8085$$ environment is given below:
$$\eqalign{ & LXI\,\,\,\,\,\,\,\,\,\,\,\,\,D\,\,\,DISP \cr & LP\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,CALL\,\,\,SUB \cr} $$

It is desired that control be returned to $$LP+DISP+3$$ when the $$RET$$ instruction is executed in the subroutine. The set of instructions that precede the $$RET$$ instruction in the subroutine are

A
$$\eqalign{ & POP\,\,\,D \cr & DAD\,\,\,H \cr & PUSH\,\,\,D \cr} $$
B
$$\eqalign{ & POP\,\,\,H \cr & DAD\,\,\,D \cr & INX\,\,\,H \cr & INX\,\,\,H \cr & INX\,\,\,H \cr & PUSH\,\,\,H \cr} $$
C
$$\eqalign{ & POP\,\,\,H \cr & DAD\,\,\,D \cr & PUSH\,\,\,H \cr} $$
D
$$\eqalign{ & XTHL \cr & INX\,\,\,D \cr & INX\,\,\,D \cr & INX\,\,\,D \cr & XTHL \cr} $$
GATE EE Subjects
Electromagnetic Fields
Signals and Systems
Engineering Mathematics
General Aptitude
Power Electronics
Power System Analysis
Analog Electronics
Control Systems
Digital Electronics
Electrical Machines
Electric Circuits
Electrical and Electronics Measurement