Page 102 - DCAP210_INTRODUCTION__TO_MICROPROCESSORS

Introduction to Microprocessors

Notes 5. The first step in the execution of an instruction by the CPU is

(a) fetching the instruction (b) searching the instruction
(c) copy the instruction (d) copy the instruction from register
6. Which flag is set (1) if the ALU operation results in the Accumulator being equal to 0 else
the flag will be reset (0), if the result is not 0

(a) sign flag (b) status flag
(c) carry flag (d) zero flag

6.6 Review Questions
1. What are the various registers of 8085? Discuss their function?
2. What is the function of HOLD and HLDA?
3. What is function of ALE signal in 8085?
4. Discuss the function of ALU of 8085.
5. Explain the generation of control signals in 8085.
6. Explain clock generation of 8085CPU.
7. What is timing diagram? What do you mean by machine cycle, fetch cycle, and T-state?
8. Discuss opcode fetch operation with timing diagram.
9. Discuss the timing diagram of I/O read and I/O write operation.
10. Explain with neat diagram the pin structure of 8085.
11. Discuss with functional diagram the internal architecture of 8085.

Answers for Self-Assessment Questions

1. (a) 2. (b) 3. (d) 4. (c)
5. (a) 6. (d)

6.7 Further Reading

Microprocessor architecture, programming, and systems featuring the 8085, William
A. Routt

http://books.google.com/books?

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