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Microprocessor

Microprocessor
In order to complement the lower nibble of accumulator one can use

 ANI 0FH
 XRI 0FH
 ORI 0FH
 CMA

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Microprocessor
Which of the following is not treated as hexadecimal constant by assembler in 8085?

6 AFH
45 H
64 H
234

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Microprocessor
The operations executed by two or more control units are referred as

 Micro-operations
 Multi-operations
 Bi control-operations
 Macro-operations

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Microprocessor
The execution of RST n instruction causes the stack pointer to

 increment by two
 decrement by two
 remain unaffected
None of these

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

 Stack Pointer
 PSW
 B-C
 D-E

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Microprocessor
While using a frequency counter for measuring frequency, two modes of measurement are possible: Period time Frequency mode There is a ‘cross-over frequency’ below which the period mode is preferred. Assuming the crystal oscillator frequency to be 4MHz, the crossover frequency is given by

 1Khz.
 8 Mhz.
 2 Mhz.
 2 Khz.

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