Timing Diagram of Some Instructions
- MVI A,45
- STA 8000H
- INR M
Timing Diagram of MVI A,45
- Loading opcode 4EH from memory 2000H. (Operation Code Loading Machine Cycle)
- Read (move) data 45H from memory 2001H. (memory reading).
|
Address |
Mnemonics |
Opcode |
|---|---|---|
|
2000H |
MVI A,45H |
4EH |
|
2001H |
45H |
Timing Diagram of MVI Instructions
Timing Diagram of STA 8000H
- STA stands for Store Accumulator – the contents of the accumulator are stored at (1000H).
- The transaction code of STA indicates 32H. It is provided by 1000H memory (see picture). – In the machine cycle.
- Then read the sub address (00). – Memory reading machine cycle
- Read higher memory location (80) – Memory read machine cycle.
- Consider the combination of the two addresses and write the details of the accumulator for 8000. – Don’t forget to write the machine cycle
- Assume the memory address for the instruction and let the content of accumulator is C7H. So, C7H from accumulator is now stored in 8000H.
|
Address |
Mnemonics |
Opcode |
|---|---|---|
|
1000H |
STA 8000H |
32H |
|
1001H |
00H |
|
|
1002H |
80H |
Timing Diagram of STA Instructions
Timing Diagram of INR M Instructions
- C500H INR M 34H
- D050 as memory address
- E1H and E2H as opcode
Timing Diagram of INR Instructions
Timing Diagram 8085 Microprocessor
A time diagram is a graphical representation where the 8085 instruction timing diagram represents the execution time of each instruction in graphical format. In this article, we will be Going Through the Timing Diagram, We will go through Different Machine Cycles Such as Opcode Fetch, Memory Read, Memory Write, I/O Read, and I/O Write, Then we will go through the Timing Diagram of Some Instructions such as MVI, STA, and INR, At last, we will conclude our Article with Applications and Some FAQs.
Table of Content
- What is a Timing Diagram?
- Machine Cycle of 8085
- Opcode fetch machine cycle of 8085
- Memory Read Machine Cycle of 8085
- Memory Write Machine Cycle of 8085
- I/O Read Machine Cycle
- I/O Write Machine Cycle
- Timing Diagram of Some Instructions
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