Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 4th Sem New 2140304 Microprocessor And Its Interfacing Previous Question Paper
1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?IV (NEW) EXAMINATION ? WINTER 2018
Subject Code:2140304 Date:28/11/2018
Subject Name:Microprocessor & its Interfacing
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Explain R/2R ladder network circuit used in D/A converter. 03
(b) What are interfacing logic devices? Explain all with figures. 04
(c) With neat schematic explain architecture of 8085.Why 8085 is called 8-
bit microprocessor?
07
Q.2 (a) Explain various addressing modes of 8085. 03
(b) Design a seven segment LED output port with the device address F5H,
using a 74LS138 3-to-8 decoder, a 74LS20 4-input NAND gate, a
74LS02 NOR gate and a common anode seven segment LED.
04
(c) Interface 32K EPROM and 32K RAM with 8085, mention the address
range for both. Draw neat schematic.
07
OR
(c) With neat schematic show interfacing circuit of D/A convertor
(preferably 1408) with 8085, with necessary addressing scheme.
07
Q.3 (a) Sixteen bytes of data are stored at location C000H to C05FH. Write a
program to transfer the entire block to new location starting at D000H.
03
(b) Draw and explain timing diagram of STA C000h stored at memory
location starting at D000H.
04
(c) Write a program to count continuously in hexadecimal from FFH to
00Hin a system with a 0.5?S clock period. Display the number on any
output port.
07
OR
Q.3 (a) Write difference between Memory mapped I/O and Peripheral mapped
I/O.
03
(b) Draw and explain timing diagram of MVI A,64H stored at memory
location starting 3000H.
04
(c) Write a program to generate rectangular wave with period of 200 ?S
ON- period and 400 ?S OFF- period.
07
Q.4 (a) Explain concept of Successive Approximation (SAR type) A to D
converter with figures.
03
(b) Explain the concept if Interrupt in 8085.How many Interrupts are there
in 8085? What is vector location and how it is mapped?
04
(c) Explain various modes used in 8255 PPI. 07
OR
Q.4 (a) Explain CMP and CPI instructions. 03
(b) Explain RS 232 serial communication protocol with figure. 04
(c) With neat schematic explain working of 8255 Programmable Peripheral
Interface. How it is useful for 8085?
07
Q.5 (a) Explain with figure rotate and SWAP instructions. 03
(b) Explain the concept of subroutine with help of CALL and RET
instruction.
04
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?IV (NEW) EXAMINATION ? WINTER 2018
Subject Code:2140304 Date:28/11/2018
Subject Name:Microprocessor & its Interfacing
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Explain R/2R ladder network circuit used in D/A converter. 03
(b) What are interfacing logic devices? Explain all with figures. 04
(c) With neat schematic explain architecture of 8085.Why 8085 is called 8-
bit microprocessor?
07
Q.2 (a) Explain various addressing modes of 8085. 03
(b) Design a seven segment LED output port with the device address F5H,
using a 74LS138 3-to-8 decoder, a 74LS20 4-input NAND gate, a
74LS02 NOR gate and a common anode seven segment LED.
04
(c) Interface 32K EPROM and 32K RAM with 8085, mention the address
range for both. Draw neat schematic.
07
OR
(c) With neat schematic show interfacing circuit of D/A convertor
(preferably 1408) with 8085, with necessary addressing scheme.
07
Q.3 (a) Sixteen bytes of data are stored at location C000H to C05FH. Write a
program to transfer the entire block to new location starting at D000H.
03
(b) Draw and explain timing diagram of STA C000h stored at memory
location starting at D000H.
04
(c) Write a program to count continuously in hexadecimal from FFH to
00Hin a system with a 0.5?S clock period. Display the number on any
output port.
07
OR
Q.3 (a) Write difference between Memory mapped I/O and Peripheral mapped
I/O.
03
(b) Draw and explain timing diagram of MVI A,64H stored at memory
location starting 3000H.
04
(c) Write a program to generate rectangular wave with period of 200 ?S
ON- period and 400 ?S OFF- period.
07
Q.4 (a) Explain concept of Successive Approximation (SAR type) A to D
converter with figures.
03
(b) Explain the concept if Interrupt in 8085.How many Interrupts are there
in 8085? What is vector location and how it is mapped?
04
(c) Explain various modes used in 8255 PPI. 07
OR
Q.4 (a) Explain CMP and CPI instructions. 03
(b) Explain RS 232 serial communication protocol with figure. 04
(c) With neat schematic explain working of 8255 Programmable Peripheral
Interface. How it is useful for 8085?
07
Q.5 (a) Explain with figure rotate and SWAP instructions. 03
(b) Explain the concept of subroutine with help of CALL and RET
instruction.
04
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2
(c) With neat schematic explain working of 8253 Programmable timer
Interface.
07
OR
Q.5 (a) Explain Control word of 8155 Multipurpose programmable device. 03
(b) Explain Bus organization of 8085. 04
(c) With neat schematic explain working of 8259 Programmable Interrupt
Controller.
07
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This post was last modified on 20 February 2020