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Microprocessor

Microprocessor
Identify the communication interfacing device from the following

 8251
 8257
 8155
 8255

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Microprocessor
RST0 - RST7 are the __________ in 8085.

 conditional interrupts
 hardware interrupts
 software interrupts
 logical interrupts

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Microprocessor
How many T-states are required for execution of OUT 80H instruction?

 16
 13
 7
 10

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Microprocessor
Assertion(A): Address bus is unidirectional. Reason(R): Data bus is bidirectional

 A is false but R is true
 A is true but R is false
 Both A & R are true and R is the correct explanation of A
 Both A & R are true but R is not the correct explanation of A

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Microprocessor
Inintel 8085A microprocessor ALE signal is made high to

 Enable the data bus to be used as low order address bus
 To achieve all the functions listed above
 To latch data D0-D7 from data bus
 To disable data bus

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Microprocessor
In 8085 microprocessor, in response to RST 7.5 interrupts the execution is transferred to memory location

 0034H
 002CH
 0000H
 003CH

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