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Microprocessor

Microprocessor
Identify the communication interfacing device from the following

 8257
 8255
 8251
 8155

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Microprocessor
Total number of instructions in 8085 microprocessor assembly language is

 244
 245
 247
 246

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Microprocessor
In a microprocessor based system the stack is always in

 EPROM
 microprocessor
 ROM
 RAM

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Microprocessor
Total number of modes the 8253 can work

 12
 6
 4
 8

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Microprocessor
Let the content of register C be 00000000 before the instruction DCR C is executed. The content of register C after the after the execution of this instruction will be

 00000001
 00000000
 11111111
 None

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

 7
 13
 16
 10

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