1. Parul Polytechnic Institute Parul Polytechnic Institute Subject Code : 3330705 Name Of Subject : Microprocessor and assembly language programming Name of Unit : Introduction to Microprossor Topic : 8085 Bus Organization Name of Faculty : H.M.Avaiya & N.D.Dhameliya Name of Students: (i) SONI NISHABEN(043) (ii) PATEL NIDHI N(024)

2. THE 8085 BUS ORGANIZATION

3. BUS ORGANIZATION DATA BUS ADDRESS BUS CONTROL BUS

4. 8085 BUS ORGANIZATION To make the complete system using a microprocessor, We need to interface the microprocessor with the memory and other input / output devices. This interfacing is achieved by mean of connecting no. of line between the microprocessor and memory / peripheral devices. The specific group of line is called a bus which actually transfer the bit from the microprocessor to peripheral devices and vice versa.

5. DATA BUS It is a bidirectional bus which allows the transfer of the data between the microprocessor and memory or peripheral devices. In the 8085, it is 8-bit bidirectional bus. Which can carry 8-bit of information at a time.

6. ADDRESS BUS It is unidirectional bus which carries address of memory location or port no. of a peripheral device. In the 8085, address bus is 16-bit. The no. of lines in the address bus also determine the total amount of memory accessed by the microprocessor. For example, the 8085 can access total 64 Kbytes of memory because it has 16-bit address bus.

7. CONTROL BUS It consists of various signal lines that carries synchronization signal which act as an handshake signals between the microprocessor and peripheral devices. As an example, the microprocessor send an appropriate signal to activate the memory devices in order to read or write the data.

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