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Memory Write and I/O Read Machine Cycle -Timing Diagram

Published on Jun 18 2014 // Timing Diagram


Memory Write Machine Cycle of 8085:

  • The memory write machine cycle is executed by the processor to write a data byte in a memory location.
  • The processor takes,3T states to execute this machine cycle..

Fig – Timing Diagram for Memory Write Machine Cycle

I/O Read Cycle of 8085:

  • The I/O Read cycle is executed by the processor to read a data byte from I/O port or from the peripheral, which is I/O, mapped in the system.
  • The processor takes 3T states to execute this machine cycle.
  • The IN instruction uses this machine cycle during the execution

Fig – Timing Diagram for I/O Read Machine Cycle

Timing Diagram of Machine cycles…(Contd) – >>Page4