Week 2

Question 1

n-bit processors?

Answer 1

n-bit processor indicates it has an n-bit ALU. The ALU decides how much data can be processed at a time.

Question 2

Data Bus

Answer 2

-Transfers data
-Width determines how much data can be transferred at a time in one cycle
-The wider the data bus, the more data can be transferred in one cycle so less number of cycles required and a faster processor.

Question 3

Control Bus

Answer 3

Carries control signals
Control signals include:
-Selection of memory or I/O devices
-Direction of data transfer
-Synchronisation of data transfer

Question 4

Address Bus

Answer 4

Address bus transfers data
1 wire can address 2 loations

Question 5

How many bits on one byte

Answer 5

8 bits in one byte
One memory location stores on byte of data
2^N locations can store 2^N bytes of data

Question 6

How is data “2023H” stored in memory?

Answer 6

Its stored as 2 bytes. Instead of one 2023H being stored as one, a 20H and a 23H is stored separately. One memory cell can store 8 bits maximum.

Question 7

Whats the little endian rule?

Answer 7

Its a type of addressing that refers to the order of data stored in memory.
The LSB is first stored and subsequent bits are stored incrementally.
In other words, the lower byte of data are stored at the lower byte of memory

Question 8

To transfer the data 2023H to memory using 16 bit data bus…?

Answer 8

2 memory locations need to be accessed. In one cycle, 2 addresses can be transferred by the address bus. Therefore we need 2 cycles to transfer 2023H

Question 9

What is memory banking?

Answer 9

Memory