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Max. Marks: 100

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06000EE309122001 Pages: 2

Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY

Fifth Semester B.Tech Degree (S,FE) Examination January 2022 (2015 Scheme)

Course Code: EE309
Course Name: MICROPROCESSOR AND EMBEDDED SYSTEMS
PARTA
Answer all questions, each carries 5 marks.
Explain the operation of following instructions
(i)STA 2500 (ii)DAD 8 (iii)ADD M (iv)RET
Sketch the timing diagram of MOV B,C
Explain Software and Hardware interrupts in 8085 Microprocessor with
example.
Compare Microprocessor and Microcontroller.
Discuss the 8-bit PSW register in 8051
Explain TMOD register of 8051.
Explain the Data types and Directives of 8051 Microcontroller
Write an ALP in 8051 to generate a square wave on bit 0 of Port 1 with on and
off period of same length.
PART 13
Answer any two full questions, each carries 10 marks.
Explain the architecture of 8085 microprocessor with the help of a neat

functional block diagram

Explain different addressing modes in 8085 with examples

Explain Fetch cycle & Execute cycle in 8085.

Analyse the content of stack pointer after the execution of PUSH and POP
instructions with an example

Find the count to be loaded in a register pair to obtain a delay of 2500 us.

Assume external quartz crystal oscillator clock frequency as 6 MHz

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Duration: 3 Hours

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