GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VI (OLD) EXAMINATION - WINTER 2017
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Subject Code: 162002 Date: 20-11-2017Subject Name: Micro Processors and Microcontrollers
Time: 02:30 pm to 05:00 pm Total Marks: 70
Instructions:
1. Attempt all questions.
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2. Make suitable assumptions wherever necessary.3. Figures to the right indicate full marks.
Q.1 (a) 1. What is the internal RAM and ROM memory size of 8051 Microcontroller? 07
2. Which instruction can only do data transfer from I/O to external data memory of 8051 Microcontroller?
3. What is the size of address and data bus of 8085 Microprocessor?
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(b) Explain the functionality of ALE, TRAP, SOD and X1 & X2 pin of 8085 Microprocessor. 07
Q.2 (a) What is the function of Accumulator? Explain the flag register of 8085 Microprocessor. 07
(b) Explain DAA, DAD, MVI and HLT instructions of 8085 Microprocessor with example. 07
OR
(b) List out the features of 8051 Microcontroller and discuss any embedded application with respect to your answer. 07
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Q.3 (a) Write an 8085 assembly language program to multiply two 8-bit numbers stored at 3000H and 3001H and store the answer at 4000H onwards. 07
(b) Write an 8085 assembly language programs to subtract an 8 bit stored at 4151H from an 8 bit stored at 4151H using 2’s complement method, store the answer at 4153H onwards. 07
OR
Q.3 (a) Write an assembly language program for 8085 to generate delay Of 10ms (assume 0.333us clock cycle) 07
(b) Write an assembly language program in 8051 to convert an 8-bit binary number stored in external memory to BCD number and store your answer to successive external memory location. 07
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Q.4 (a) When the micro controller executes some arithmetical or logical operations, then the bits of which register are affected? Explain your answer with examples. 07
(b) Illustrate the internal RAM memory organization of 8051 Microcontroller. 07
OR
Q.4 (a) Explain the interrupts of 8051 Microcontroller. 07
(b) Explain CPL P1.1, CLR P1.2, ANL C,1 and ORL A4,Rn for 8051 Microcontroller. 07
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Q.5 (a) What is Special Function Registers? Explain any three in detail. 07
(b) Store 01H, 02H, 03H and 04H in register RO, R1, R2 and R3 respectively and exchange data stored in Reg. RO with R1 and data in Reg. R2 with R3. 07
OR
Q.5 (a) Draw explain the architecture of the 8051 Microcontroller. 07
(b) Write a program to toggle the PORT1 LEDs of 8051 Microcontroller. 07
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