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Microprocessor

Microprocessor
Pick up the programmable interrupt controller from the following

 8257
 8259
 8275
 8279

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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.
 2 Khz.
 2 Mhz.
 8 Mhz.

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Microprocessor
A combinational PLD with a programmable AND array and a fixed OR array is called a

 PAL
 PLA
 PROM
 PLD

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Microprocessor
The reason for the presence of ALE pin in 8085, but not in 6800 is that

 8085 has multiplexed bus, whereas 6800 does not have
 8085 uses I/O mapped I/O, whereas 6800 uses memory mapped I/O
 None
 8085 has 5 interrupts lines, whereas 6800 has only two

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Microprocessor
________is the only non-vectored interrupt in 8085 microprocessor.

 RST 7
 TRAP
 RST 5.5
 INTR

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Microprocessor
When the write enable input is not asserted, the gated D latch _________ its output.

Sets
Clears
Can not change
Complements

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