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Microprocessor

Microprocessor
A single instruction to clear the lower nibble of accumulator in 8085 language assembly is

 ANI F0H
 ANI OFH
 XRI FOH
 XRI 0FH

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Microprocessor
SPHL instruction copies the content of H-L register pair to the _________.

 PSW
 D-E
 B-C
 Stack Pointer

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Microprocessor
The maximum number of seven segment displays that can be connected to 8279 is

 16
 8
 18
 12

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Microprocessor
Which memory has read operation, byte erase, byte write and chip erase?

EEPROM
UVEPROM
Both B and C
RAM

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Microprocessor
Which of the following is not a general purpose peripheral?

Programmable CRT controller
Programmable interrupt controller
I/O port
Programmable interval timer

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Microprocessor
Assuming LSB is at position 0 and MSB at position 7, which bit positions are not used (Undefined) in flag register of an 8085 microprocessor?

 1, 2, 5
 1, 3, 4
 1, 3, 5
 2, 3, 5

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