5.6 (a) Flashcards
List the main components of a basic computer system?
- Input Section
- Output Section
- CPU (Central Processing Unit)
- Memory Section
- Interconnecting Buses
List the types of inputs and outputs of a computer?
Inputs:
- Analog - Smooth changing voltage
- Digital -Series of high low level voltages (1 or 0)
- Discrete - on/off condition (closure of relay)
Outputs:
- DA converter (Digital to Analogue)
- Digital Transmitter (conversion then transmit digital bus)
- binary (requires dimultiplexer)
Which data format does a computer use?
Binary
How is analogue data converted for use in a computer?
an A/D converter
Analogue to Digital Converter
How is serial data converted for use in a computer?
A multiplexer converts it into a ‘Word’
In a computer what do the following terms mean:
a) Word
b) Byte
c) Bit
d) BITE
a) A complete unit of binary information or data is called a word
b) A Byte may be a word or only part of a word. 8 bits = 1 Byte
c) A bit is a numerical value either 1 or 0
d) BITE = Built in Test Equipment
A memory capacity of 64k = _________
65,536 bits
comma
Describe an Address Bus?
16 mono-directional lines. The lines originate from CPU and are connected to the memory and I/O ports.
Address is where to deliver it, content is data to be delivered
Series of high lows on these 16 mono-directional lines tells where address is
Where does an Address Bus originate from?
The CPU
16 mono-directional lines
Describe a Data Bus?
8 bi-directional lines and facilitates transmission of data between CPU ,memory and I/O ports
What does a Data Bus interconnect?
CPU memory and I/O
transfer of data on 8 bi-directional lines
Describe a Control Bus?
10 - 12 mono and bi directional lines
4 functions:
- Memory
- Input - Output
- MPU
- Utilities such as clock
List the four functions of a Control Bus?
- Memory Synchronisation
- Input - Output
- MPU (Memory Protectional Unit)
- Utilities such as a clock
What is meant by mono-directional?
One direction
Address bus identifies addresses using 16 mono-directional lines
Control bus uses 10 - 12 mono and Bi directional lines
Describe the role of a CPU, identifying its main parts?
CPU = Central Processing Unit
Main part of computer
Register Section
ALU (Arithmetic/logic unit)
Control Unit
Identify the types of memory that are non-volatile?
