[EI 502] Some questions on topics covered up to 31 Jul 2011

Here are some questions from items covered so far. Please try to answer them. We shall discuss the answers in a later post.

1.    What are the operations performed by a microprocessor?
2.    Why should the data bus be bi-directional?
3.    What are the functions of the address bus?
4.    What are the control signals used in the control bus of a 8085 microprocessor?
5.    Define Fetch, Decode, Execute phases of an instruction.
6.    How would you define a byte, nibble, word and a long word?
7.    What are the differences in a microprocessor based system and a hardware system?
8.    What are the functions of control unit in a microprocessor?
9.    Describe the sequence of operations that take place when a microprocessor is powered on?
10.  What are tri-state devices?
11. What are buffers?
12.  Explain the workings of a latch.
13.  What are the functions fulfilled by an accumulator?
14. What do you understand by a flag inside a microprocessor?
15.  The program counter and the stack pointer inside 8085 are 16 bit in length. Why so?
16. What starts to happen when a 8085 microprocessor?
17. How could the various operations happening inside the 8085 MPU be identified?
18. Why are tri-state devices required in a microprocessor based system?