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United International University (Uiu) : Dept. of Computer Science & Engineering

This document is a test paper for the course CSE 4325 on Microprocessors and Microcontrollers at United International University for Fall 2023. It includes questions on data transfer rates using DMA, maximum RAM size for a new microprocessor, specifications of a purchased microprocessor, and interfacing with an 8086 microprocessor. The test consists of multiple questions with varying marks totaling 20, to be completed in 25 minutes.

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Tazveer Hossain Khan
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16 views1 page

United International University (Uiu) : Dept. of Computer Science & Engineering

This document is a test paper for the course CSE 4325 on Microprocessors and Microcontrollers at United International University for Fall 2023. It includes questions on data transfer rates using DMA, maximum RAM size for a new microprocessor, specifications of a purchased microprocessor, and interfacing with an 8086 microprocessor. The test consists of multiple questions with varying marks totaling 20, to be completed in 25 minutes.

Uploaded by

Tazveer Hossain Khan
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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UNITED INTERNATIONAL UNIVERSITY (UIU)

Dept. of Computer Science & Engineering


Trimester: Fall 2023 (Class Test 1)
Course No: CSE 4325 Course Title: Microprocessors and Microcontrollers

Time: 25 minutes Marks: 20

Name Section ID

1. Transfer of bus control from processor to device takes 100 ns. But, Transfer of bus
control from device to processor takes 200 ns. One of the I/O devices has a data
transfer rate of 50 KB/sec and employs DMA.

a. Suppose we employ DMA in a burst mode. How long does it take to transfer a
block of 1024 bytes? (2.5)
b. If data is transferred eight bytes at a time, calculate the time required for
transferring 1024 bytes in cycle stealing mode. (2.5)

2. Suppose you have invented a new microprocessor “X”. It has a 16-bit address bus and
64-bit data bus. What is the maximum size of the RAM that can be used with this
microprocessor? (5)
3. Suppose you have purchased a 2.40GHz 64-bit microprocessor from the market. What key
details or specifications can you determine about the microprocessor based on this
information? (2.5+2.5)
4. Suppose you are working with an 8086 microprocessor and 82C55 interfacing medium. You
have set the value of DDRA register to F0H. Now you are trying to take input from PA4, PA5,
PA6, PA7. Will it work properly? Give reasons for your answer. (1+4)
[Hints: Convert F0 (Hex value) to Binary value]

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