GATE EE 2014 Set 3 | Microprocessor Question 2 | Digital Electronics

GATE EE 2014 Set 3

MCQ (Single Correct Answer)

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In $$8085A$$ microprocessor, the operation performed by the instruction $$LHLD$$ $${2100_H}$$ is

$$\left( H \right) \leftarrow {21_H},\,\left( L \right) \leftarrow {00_H}$$

$$\left( H \right) \leftarrow M\left( {{{2100}_H}} \right),\,\left( L \right) \leftarrow M\left( {{{2101}_H}} \right)$$

$$\left( H \right) \leftarrow M\left( {{{2101}_H}} \right),\,\left( L \right) \leftarrow M\left( {{{2100}_H}} \right)$$

$$\left( H \right) \leftarrow {00_H},{\mkern 1mu} \left( L \right) \leftarrow {21_H}$$

GATE EE 2008

MCQ (Single Correct Answer)

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An input device is interfaced with Intel $$8085$$ $$A$$ microprocessor as memory mapped $${\rm I}/O,$$ the address of the device is $$2500H.$$ In order to input data from the device to accumulator, the sequence of instructions will be

$$\eqalign{ & LX{\rm I}\,\,\,H,2500H \cr & \,\,\,\,MOV\,\,A,M \cr} $$

$$\eqalign{ & LX{\rm I}\,\,\,H,2500H \cr & \,\,\,\,MOV\,\,M,A \cr} $$

$$\eqalign{ & LHLD\,\,\,2500H \cr & \,\,\,\,MOV\,\,A,M \cr} $$

$$\eqalign{ & LHLD\,\,\,2500H \cr & \,\,\,\,MOV\,\,M,A \cr} $$

GATE EE 2002

MCQ (Single Correct Answer)

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When a program is being executed in an $$8085$$ microprocessor, its Program Counter contains

the number of instructions in the current program that have already been executed

the total number of instructions in the program being executed

the memory address of the instruction that is being currently executed

the memory address of the instruction that is to be executed next

GATE EE 2002

MCQ (Single Correct Answer)

-0.3

The logic circuit used to generate the active low chip select $$(CS)$$ by an $$8085$$ microprocessor to address a peripheral is shown in Fig. The peripheral will respond to addresses in the range. GATE EE 2002 Digital Electronics - Microprocessor Question 22 English