8085 microcontroller pdf generation

The intel 8085a is a new generation, complete 8 bit parallel central processing unit. It was binary compatible with 8080 microprocessor but required less supporting hardware thus leading to less expensive microprocessor systems. Here i have covered basics, architecture, programming modal, interfacing and programming of 8085. Microprocessor history and generation of microprocessor. What is meant by the statement that 8085 is a 8bit microprocessor. This processor was a major improvement over the previous generation 80808085 series intel microprocessors in several ways. Processors like intel 8085 motorola 6800 and 6801 etc came into existence.

The program counter in 8085 microprocessor is a 16bit register, because. It is a softwarebinary compatible with the morefamous intel 8080 with only two minor instructions added to support its added interrupt and serial inputoutput features. The time for the back cycle of the intel 8085 a2 is 200 ns. Dec 11, 2012 the 8085 and its busses the 8085 is an 8bit general purpose microprocessor that can address 216 64k byte of memory. Second generation the second generation marked the development of 8 bit microprocessors from 1973 to 1978. The eu contains control circuitry, which directs internal operations. An assembler is a software tool a program designed to simplify the task of writing computer programs. During this period, the other microprocessors in the market including rockwell international pps4, intel8008, and national semiconductors imp16 were in use. The processor decode the instruction in the instruction register and generate. These differences are described in a short section at the end of this chapter.

The microprocessor has become a more essential part of many gadgets. The microprocessor plays a significant role in the everyday functioning of industrialized societies. The memory addresses given in the program are for a particular microprocessor kit. Dac is output device so for connecting dac with microprocessor. The 8085 machine language the 8085 from intel is an 8bit microprocessor. This page on microcontroller 8051 vs 8085 microprocessor describes difference between 8051 and 8085. Introduction to microprocessorsobjectives, introduction. It facilitates the users storing 16bit data temporarily. Central processing unit cpu is carved on a single chip is called a microprocessor. Lecture note on microprocessor and microcontroller theory vssut. Evolution of microprocessor types and applications.

Dec 08, 2016 4 which control signals isare generated by timing and control unit of 8051 microcontroller in order to access the offchip devices apart from the internal timings. It is an appended version of the 8080 microprocessor. Before we dig into 8051 vs 8085 let us understand difference between generic microcontroller vs microprocessor. Motorolas mc68000 microprocessor, introduced in 1979, is an example. To write a program to initiate 8251 and to check the transmission and reception of character. Pdf ec6504 microprocessor and microcontroller mpmc books. The intel 8085 eightyeightyfive is an 8bit microprocessor produced by intel and introduced in march 1976. It was intel 8008, and another improved version was intel 8088. Actually, it is better to say this high tech modern era is surrounded by microprocessors.

Second generation 8 bit microprocessor the second generation microprocessors were introduced in 1973 again by intel. The kit enables studying from low level programming with direct machine code entering to high level programming with pc tools easily. The memory interfacing in 8085 is used to access memory quite frequently to read instruction codes and data stored in memory. Introduction fundamentals of microprocessor 8085 and. This manuscript attempts to describe the basic architecture of a microcontroller system, and. It is a device or rather say a integrated chip which process some instructions given to it in microseconds. Microprocessors and interfacing 8086, 8051, 8096, and. Mar 16, 2020 in this article, we will discuss 8085 microprocessor pin configuration or pin diagram of 8085 or external architecture of 8085 microprocessor.

The evolution of microprocessors was divided into five generations such as first, second, third, fourth and fifth generation and the characteristics of these generations are discussed below. The memory interfacing in 8085 is used to access memory quite frequently to. Lecture note on microprocessor and microcontroller theory. Features of 8085 intel 8085 is an 8bit, nmos microprocessor. Microprocessor 8085 pin configuration electricalvoice.

These addresses can be changed to suit the microprocessor kit available in your system. Its data bus width is 8bit and address bus width is 16bit, thus it can address 216 64 kb of memory. A nice feature, singlestep running, helps students learn the. Intel 8085 8bit microprocessor intel 8085 is an 8bit, nmos microprocessor. It is an nmos device having around 6200 transistors contained in a 40 pin dip package. To interface dac with 8085 to demonstrate the generation of square, saw tooth and triangular. In 1978, intel corporation introduced a 16bit microprocessor called the 8086. Microprocessors and microcontrollers 8085, 8086 and 8051 subject. Figure 1 shows the pin diagram of the 8085 microprocessor. The 8085 microprocessor kit is a lowcost single board computer designed for selflearning the popular 8085 microprocessor. The functional components of a cpu are arithmetic logic unit alu, control and timing units, registers are found in a single integrated circuit called ic. Hardware architecture of 8085 microprocessor rmd engineering. Introduction to microprocessor 6 the 8085 interrupts the 8085 has 5 interrupt inputs.

This was the period from 1971 to 1973 of microprocessors history. Memory is an integral part of a microprocessor system, and in this section, we will discuss how to interface a memory device with the microprocessor. Programming diffelences between the 8080 and the 8085 micro processors are relatively minor. The 8080 8085 was an 8bit system meaning that, the microprocessor could work on only 8. Interview questions on microprocessor with detailed answers. In 1971, intel created the first microprocessor 4004 that would run at a clock speed of 740 khz. To transfer the data inside the chip from one place to another it has bus system just like our buses to. By the late 1970s, enough transistors were available on the ic to usher in the second generation of microprocessor sophistication. The useful links to difference between various terms are provided here. The 8085 and its busses the 8085 is an 8bit general purpose microprocessor that can address 216 64k byte of memory. A microprocessor which has n data lines is called an nbit microprocessor i. The 8085 uses a total of 246 bit patterns to form its instruction set. To find the smallest number in an array of data using 8085 instruction set.

To interface 8253 programmable interval timer to 8085 and verify the operation of 8253 in six different modes. Third generation the third generation brought forward the 16 bit processors like intel 80868018680286 motorola 68000 68010 etc. In this article, we will discuss 8085 microprocessor pin configuration or pin diagram of 8085 or external architecture of 8085 microprocessor. To interface dac with 8085 to demonstrate the generation of square, saw tooth and triangular wave. The timing and control circuitry is used for generating timing, control and status signals that. A microprocessor is a programmable, multipurpose, clock driven, registerbased electronic device that accepts binary data as input, stores it in the form. Multiple choice questions and answers on microcontrollers and. What is the technology used in the manufacture of 8085. The reason for the difference is that some actually most instructions have multiple different formats. Unit1 introduction to 8086 ece department microprocessors and microcontrollers page 4 the execution unit eu. The execution unit of the 8086 tells the biu where to fetch instructions or data from, decodes instructions, and executes instructions. Lecture note on microprocessor and microcontroller theory and. It is a 40 pin c package fabricated on a single lsi chip.

It is an 8bit microprocessor designed by intel in 1977 using nmos technology. It is a general purpose microprocessor capable of addressing 64k of memory. Microprocessors and microcontrollers 8085, 8086 and 8051. Pdf an introduction to microprocessor 8085 researchgate. Download ec6504 microprocessor and microcontroller mpmc books lecture notes syllabus part a 2 marks with answers ec6504 microprocessor and microcontroller mpmc important part b 16 marks questions, pdf books, question bank with answers key, ec6504. The advantages of second generation microprocessor are given below. Introduction to 8085 the advanced versions consume 20% less power supply. Lets see some simple example to demonstrate the use of some important instructions of 8085.