Download GTU B.Tech 2020 Winter 4th Sem 2141001 Microprocessor And Interfacing Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY

BE- SEMESTER-IV (NEW) EXAMINATION - WINTER 2020

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Subject Code:2141001 Date:11/02/2021

Subject Name:Microprocessor and Interfacing

Time:02:30 PM TO 04:30 PM Total Marks:56

Instructions:

1. Attempt any FOUR questions out of EIGHT questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

1. (a) Explain the flag register and flag bits of 8085. [03]
2. (b) Explain the need of ALE and IO/M pins of the 8085 microprocessor [04]
3. (c) What is stack? Explain stack operations in 8085 microprocessor using PUSH and POP instructions with neat sketches. When stack operations are needed? [07]

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1. (a) Explain three control flag bits of 8086 microprocessor. [03]
2. (b) Classify the interrupts in 8085 Microprocessor [04]
3. (c) Draw and explain programming model of 8085 microprocessor. [07]

1. (a) Give the Comparison of RISC and CISC Microprocessor [03]
2. (b) Compare I/O mapped I/O and memory mapped I/O with respect to 8085 Microprocessor [04]

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3. (c) Draw and explain timing diagram of IN instruction. [07]

1. (a) List out the priorities of hardware interrupts in 8085. [03]
2. (b) Compare Static RAM and Dynamic RAM (memory) [04]
3. (c) Draw and explain timing diagram of OUT instruction. [07]

1. (a) Explain the difference between JMP and CALL instructions with example [03]

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2. (b) What are the function of below pins of 8251 USART DSR', DTR', RTS', CTS' [04]
3. (c) Write a program to generate a continuous square wave of period 500us and use bit D0 to output the square wave and system clock period is 325ns. [07]

1. (a) Explain the function of Program Counter. [03]
2. (b) Write a short note on branch instructions of 8085 [04]
3. (c) Write an assembly program to add 6 data bytes stored from memory location 2050h, the result can be more than 8 bits and display it at output ports 81h and 82h respectively [07]

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1. (a) State features of 8259 programmable interrupt controller. [03]
2. (b) List and explain Addressing Modes of the 8085 microprocessor. [04]
3. (c) Write a program to transfer the data bytes stored from memory location 2050 to 2056h to the memory location 3050 to 3056 in reverse order. [07]

1. (a) What is the difference between absolute decoding and partial decoding? Explain with example. [03]
2. (b) List the advantages of memory segmentation in the 8086 microprocessor. [04]

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3. (c) Draw architecture 8086 microprocessor. Explain its basic features. [07]

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