Page 81 - DCAP210_INTRODUCTION__TO_MICROPROCESSORS

Unit 5: Microcomputer System

2. Scanner is an input device used for direct data entry from the source document into the Notes
computer system.
(a) True (b) False

3. Microcomputers are not unique in that the heart of the computer (the CPU) is contained on
a single integrated chip.
(a) True (b) False

4. The simplest microcontroller architecture consists of a microprocessor, memory, and input/
output.

(a) True (b) False
5. The three components of the microcomputer system is connected by ...................... buses.
(a) Two (b) Three
(c) Four (d) Five
6. The address bus is ‘unidirectional’, over which the microprocessor sends an address code to
the memory or input/output.
(a) True (b) False
7. The data bus is ‘unidirectional’, on which data or instruction codes are transferred into the
microprocessor or on which the result of an operation or computation is sent out from the
microprocessor to the memory or input/output.
(a) True (b) False
8. Input and output devices in short are also called I/O devices.

(a) True (b) False
9. Input and output devices are not similar in operation but perform opposite functions.
(a) True (b) False

5.9 Review Questions

1. What is the purpose of the Instruction Register (IR)?
2. Draw the programming model of the Z80 microprocessor.
3. What are the differences between a general purpose with a special purpose register?
4. What is the answer register?

5. Explain the I/O devices.
6. Define the Microcontroller system.
7. Explain the Microcomputer system memory.

8. What are the features of Microcontroller system?
9. Describe the architecture of microcomputer system.
10. Describe the parts of microcomputer system.

Answers for Self-Assessment Questions

1. (a) 2. (a) 3. (b) 4. (a) 5. (a)
6. (a) 7. (b) 8. (a) 9. (b)

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