8080 microprocessor architecture pdf

Microprocessor 8085 architecture 8085 is pronounced as eightyeightyfive microprocessor. The original version of 8080 had a fault that it could drive lowpower ttl devices only. In the year 1972, the work on 8080 microprocessor was in progress and the cpu was released in april 1974. Both the temporary registers as well as accumulators are utilized for holding the information throughout in the operations then the. The intel 8080a is a complete 8bit parallel central processing unit cpu. An 8080 microprocessor is an 8bit parallel cpu, and this microprocessor is used in general purpose digital computer systems. The intel 8080 eightyeighty is the second 8bit microprocessor designed and manufactured. While 8080 requires 3 power supply lines and 2 clock signals of 500 ns. The processor saves current program counter into stack and branches to memory location n 8 where n is a 3bit number from 0 to 7 supplied with the rst instruction.

The main operation of alu is arithmetic as well as logical which includes addition, increment, subtraction, decrement, logical operations like and, or, exor, complement, evaluation, left shift or right shift. Know about architecture of the intel 8080 microprocessor. The processor calls the subroutine, address of which is specified in the second and third bytes of the instruction. Microprocessor architecture, programming and applications. The 8080 cpu consists of the following functional units. The 8080a contains 6 8bit general purpose working registers and an accumulator. The initial specified clock rate or frequency limit was 2 mhz, and with common instructions using 4, 5, 7, 10, or 11 cycles this meant that it operated at.

The microprocessor 8080 consists of 40 pins and it microprocessor transfers internal information and data through an 8 bit, bidirectional 3state data bus d0d7. The architecture of 8085 microprocessor provides the idea about what are the operations to be executed and how these are performed. Microprocessor architecture, programming and applications with 80858080. Characteristics of risc the major characteristics of a risc processor are as follows. Know about architecture of the intel 8080 microprocessor elprocus. It is an 8bit microprocessor designed by intel in 1977 using nmos technology. In december 1973 intel shipped the first 8bit, nchannel microprocessor, the 8080. The ebook has complete chapters on microprocessor and it is usually included. Since the 8080 instruction set doesnt provide multiply and divide instructions. Microprocessor architecture, programming and applications with 8085 8080. The 8080 microprocessor provides five flipflops used as condition flags s, z, p. It is important to understand the difference between the microcomputer. It is fabricated on a single lsi chip using intels nchannel silicon gate mos process. The 8080 microprocessor was designed by masatoshi shima and federico faggin.

The intel 8080 eightyeighty is the second 8bit microprocessor designed and manufactured by intel. The 8080 also adds a few 16bit operations in its instruction set. It is used in portable devices like apple ipod due to its power efficiency. Intel 8080 microcomputer systems users manual bitsavers. Architecture of risc risc microprocessor architecture uses highlyoptimized set of instructions. The block diagram for the 8080 cpu chip is shown below. Intel 8080 microprocessor is a successor to the intel 8008 cpu. It first appeared in april 1974 and is an extended and enhanced variant of the earlier 8008 design, although without binary compatibility.