What is a Timing Diagram?
A time diagram is a graphical representation. The 8085 instruction timing diagram represents the execution time of each instruction in graphical format. Execution time is given in T-states. The 8085 microprocessor has a set of control signals and data signals that play an important role in the execution of instructions. In this article, I will explain in detail what a timing diagram is and how to draw a timing diagram of different instructions
- Clock Signal: The time required to execute an instruction is called a clock cycle.
- Machine Cycle: The time required to access memory or input/output devices is called a machine cycle. The 8085 has 5 basic machine cycles i.e., load opcode, read from memory, write to memory, read I/O, and write I/O.
- T-State: A machine cycle and an instruction cycle take several clock periods. The portion of an operation performed in one system clock period is called a T-state.
- Control Signals: The control signal controls the operations. Common signals are ALE (address block enable), RD (read), WR (write), and IO/M (input/output) memory.
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