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Microprocessors
Pin Details of 8085 and Interfacing with 8085
Marks 1Marks 2
Instruction Set and Programming with 8085
Marks 1Marks 2Marks 5
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1
GATE ECE 2004
MCQ (Single Correct Answer)
+2
-0.6
The number of memory cycles required to execute the following 8085 instructions
(I.) LDA 3000H
(II.) LXI D, FOF 1H
Would be
A
2 for (I) and 2 for (II )
B
4 for (I)and 3 for (II)
C
3 for ( I )and 3 for (II)
D
3 for (I) and 4 for (II)
2
GATE ECE 2003
MCQ (Single Correct Answer)
+2
-0.6
In an 8085 microprocessor, the instruction CMP B has been executed while the content of the accumulator is less than that of register B. As a result
A
Carry flag will be set but Zero flag will be reset
B
Carry flag will be reset but Zero flag will be set
C
Both Carry flag and Zero flag will be reset
D
Both Carry flag and Zero flag will be set
3
GATE ECE 2002
MCQ (Single Correct Answer)
+2
-0.6
Consider the following assembly language program. GATE ECE 2002 Microprocessors - Instruction Set and Programming with 8085 Question 18 English The execution of the above program in an 8085 microprocessor will result in
A
an output of 87H at port 1
B
an output of 87H at port 2
C
infinite looping of the program execution with accumulator data remaining at 00H.
D
infinite looping of the program execution with accumulator data alternating between 00H and 87H
4
GATE ECE 2002
MCQ (Single Correct Answer)
+2
-0.6
The contents of Register (B) and Accumulator (A) of 8085 microprocessor are 49H and 3AH respectively. The contents of A and the status of carry flag (CY) and sign flag (S) after executing SUB B instructions are
A
A = F1, CY = 1, S =1
B
A = 0F, CY = 1, S =1
C
A = F0, CY = 0, S =0
D
A = 1F, CY = 1, S =1
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Questions Asked from Marks 2
GATE ECE 2017 Set 1 (1) GATE ECE 2016 Set 1 (1) GATE ECE 2014 Set 4 (1) GATE ECE 2011 (1) GATE ECE 2010 (1) GATE ECE 2008 (1) GATE ECE 2007 (2) GATE ECE 2006 (1) GATE ECE 2005 (2) GATE ECE 2004 (3) GATE ECE 2003 (1) GATE ECE 2002 (2)
GATE ECE Subjects
Signals and Systems
Network Theory
Control Systems
Digital Circuits
General Aptitude
Electronic Devices and VLSI
Analog Circuits
Engineering Mathematics
Microprocessors
Communications
Electromagnetics