Skip to main content

Machine Cycle, T- State in 8085 Microprocessor

Machine Cycle in 8085 Microprocessor

  • The necessary steps carried out to perform the operation or accessing either memory or  i/o device, constitutes a Machine Cycle.
  • In other words, necessary steps carried out to perform a fetch, a read or a write operation constitute a Machine Cycle.

T- State in Machine Cycle:

  • One subdivision of an operation perform in one clock cycle is called T - State.


Labels:

Comments

Post a Comment

Popular posts from this blog

Arithmetic Group Instruction Set of 8085 Microprocessor | ADD, ADC, ACI, ADI, DAD, SUB, SBB, SUI, DCR, INR, INX, DCX instruction

Arithmetic Group of 8085 Microprocessor ADD r The data in Accumulator and entered register will get added and the result will copy to Accumulator                                      Example -  ADD B                                                     (A) + (B)  ⇢   (A)     ADD M The data in Accumulator and data in the memory location pointed by HL pair will get added and the result will copy to Accumulator.                                  Example -  ADD M          ...
Post a Comment
Read more

Logical Group Instruction Set of 8085 Microprocessor | ANA, ANI, ORA, ORI, XRA, XRI, CMA, CMC, STC, CMP, RLC, RAL, RRC, RAR instruction examples

Logical Group These Logical group instructions are used in the 8085 Microprocessor program. In this article, you would get the instructions with example. In some sections, referring images are also provided to make your understanding crystal clear. ANA r Here the data of r AND (Logical AND) with the data of Accumulator and the result will store in Accumulator.                                  Example -   ANA B                                                      (B) ⋀ (A) ⟶ (A)                                          ...
Post a Comment
Read more

Pin Diagram of 8085A Microprocessor and working functions of each pin (Study Notes)

Pin Diagram of 8085A Microprocessor  Diagram: Pin Diagram of 8085 Microprocessor Functional of Each Pin (Briefly): 👉A 8 – A 15 (Output): These are address bus and used for the eight most significant bits of the memory address or eight bits i/o address. 👉 AD 0 – AD 7   (Both Input and Output): Thses are time multiplexed address/data bus that is served dual purpose. They are used for the LSB (Least Significant Bits) 8 bits of memory address and data during other time. 👉ALE (Output): It is abbreviated as Address Latch Enable. It goes high when 8 lower bits of address is latched. 👉IO/M* (Output): It is a status signal which distinguishes whether the address is for i/o or memory. When it goes high, the address bus is for an i/o device. And when it goes low, the address is for memory location because M is an active low signal. 👉S 0 , S 1 (Ouput): These are status signal send by microprocessor to distinguish various types of operation. S 0 S 1 O...
Post a Comment
Read more