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MAA Assigment 1

The document provides definitions and explanations for key concepts related to microprocessors and microcomputers, including microcontrollers, ROM, and control circuits. It outlines the primary operations of a microprocessor, the function of address and data buses, and features of the 8085 microprocessor. Additionally, it details the role of flags, memory words, and the significance of program counters and stack pointers in computing.

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10 views2 pages

MAA Assigment 1

The document provides definitions and explanations for key concepts related to microprocessors and microcomputers, including microcontrollers, ROM, and control circuits. It outlines the primary operations of a microprocessor, the function of address and data buses, and features of the 8085 microprocessor. Additionally, it details the role of flags, memory words, and the significance of program counters and stack pointers in computing.

Uploaded by

pruthvirajmore410
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Assignment 1

1. Define microprocessors?
A semiconductor device (integrated circuit) manufactured by using
the LSI technique. It includes the ALU, register arrays, and control
circuits on a single chip.
2. Define microcomputer?
A computer that is designed using a microprocessor as its CPU. It
includes microprocessor, memory and I/O.
3. Define ROM?
A memory that stores binary information permanently. The
information can be read from this memory but cannot be altered.
4. What is control Circuit?
The group of circuit that provides timing and signals to all operation
in the computer and controls data flow.
5. What is Micro controller?
A device that includes microprocessor, memory, and I/O signal lines
on a single chip, fabricated using VSLI technology
6. What is an Assembler?
A computer program that translates an assembly language program
from mnemonics to the binary machine code of a computer.
7. What are the four primary operations of MPU?
1. Memory read
2. Memory write
3. I/O read
4. I/O write
8. What do you mean by address bus?
A group of lines that are used to send a memory address or a device
address from the MPU to the memory location or a peripheral. The 8085
microprocessor has 16 address lines.
9. How many memory locations can be addressed by a microprocessor
with 14 address lines?
The 8085 MPU with its 14-bit address is capable of addressing
= 16,384 locations (i.e.) 16K memory locations.
10. Why is the data bus bi-directional?
The data bus is bi-directional because the data flow in both
directions between the MPU and memory and peripheral device
11. Define control bus?
This is single line that is generated by the MPU to provide timing of
various operations.
13. What is a flag?
The data conditions, after arithmetic or logical operations, are indicated
by setting or resetting the flip-flops called flags.
14. Why are the program counter and the stack pointer 16-bit registers?
Memory locations for the program counter and stack pointer have 16-
bit address. So, the PC and SP have 16-bit registers.
15. Define memory word?
The number of bits stored in a register is called a memory word
16. Explain the features of 8085 in detail.

The features of 8085 include:


1. It is an 8-bit microprocessor i.e. it can accept, process or provide 8-bit
data simultaneously.
2. It operates on a single +5V power supply connected at vcc.
3. It operates on clock cycle with 50% duly cycle.
4. It can operate with 3 MHz clock frequency.
5. It has 16 address buses; hence it can access 64 Kbytes of memory.
6. In 8085, the lower 8-bit address bus (A0-A7) and data bus (D0-D7) are
multiplexed to reduce number of external pins. But due to this, external
hardware is required to separate address lines and data lines.
7. It supports 74 instructions with following addressing modes.
(a) Immediate, (b) Register,
(c) Direct (d) Indirect (e) Implied.

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