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06000CS305122002

Suppose an external device interrupts the processor at the interrupt pin NMI,
write down the steps to be performed by 8086 in response.
Write the different input modes of programmable keyboard and display
interface.
Explain the architecture of 8257 with diagram.
Explain the major features of mode 2 in 8255
PART E

Answer any four full questions, each carries 10 marks.
Classify the microcontrollers based on their types.
Draw and explain the internal data memory structure of 8051.
List any five applications of microcontrollers.
Name the 16 bit registers in 8051 and write its function.
Explain the architecture of 8051.
How the stack operations differ in 8086 and 8051?
Explain the timers in 8051 with their special function registers.
Write an 8051 program to find the transpose of a 2X2 matrix stored
sequentially from 30H. Results should be stored from location 5011.
Explain the architecture of 8254 with neat diagram.
Write any four addressing modes of 8051.
Write an 8051 program to compute x to the power n where both x and n are 8
bit numbers given by users and result should not be more than 16 bits.

Explain the IO ports in 8051.

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