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Microprocessor

Microprocessor
Maximum of how many devices can be connected simultaneously to the microprocessor via 8257 in DMA data transfer mode?

 10
 8
 4
 6

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Microprocessor
An 8-bit microprocessor can have ………….. address lines.

 16
 cannot be predicted
 32
 8

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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

 2 Khz.
 1Khz.
 8 Mhz.
 2 Mhz.

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Microprocessor
While INX B instruction execute,

 only carry flag will be affected
 all flags will be affected
 only carry and zero flags will be affected
 no flags will be affected

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Microprocessor
The timing difference between a slow memory and fast processor can be resolved if

External buffer is used
Either A or B
Processor is capable of waiting
Neither A nor B

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

Both B and C
EEPROM
RAM
UVEPROM

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