The schematic representation of the 8085 bus structure is as shown in Figure. The microprocessor performs primarily four operations:
- Memory Read: Reads data (or instruction) from memory.
- Memory Write: Writes data (or instruction) into memory.
- I/O Read: Accepts data from input device.
- I/O Write: Sends data to output device.
The 8085 processor performs these functions using address bus, data bus and control bus as shown in Figure.
Fig. The 8085 bus structure