8085 microprocessor pdf notes advantages

Figure 1 shows the pin diagram of the 8085 microprocessor. When the 8085 wants to access a peripheral or a memory location, it places the 16bit address on the. It has a 16bit data bus, so it can read data from or write data to memory and ports either 16bit or 8bit at a time. Microprocessor study notes handwritten free pdf gate. What are counters and time delays in 8085 microprocessor.

The data bus width of 8085 microprocessor is 8bit i. The 8 most significant bits of the address are transmitted by the address bus, pins a 8, to a 15. Therefore, the 8085 can access locations with numbers from 0 to 65,536. Before knowing about the 8085 architecture in detail, lets us briefly discuss about the basic features of 8085 processor. Lecture note on microprocessor and microcontroller theory and. Advantages of 8086 over 8085 the silicon underground. Evolution of microprocessor types and applications. Dec 11, 2012 the 8085 and its busses the 8085 is an 8bit general purpose microprocessor that can address 216 64k byte of memory. Advantages of microprocessors is that these are general purpose electronic processing devices which can be programmed to execute a number of tasks. In this article you will get to know about the definition, architecture, block diagram and working of 8085 microprocessor. Dec 21, 2017 intel needed to follow up with something a lot better. Its data bus width is 8bit and address bus width is 16bit, thus it can address 216 64 kb of memory. You can visit similar threads as well for more free pdf and get yourself updated. The advantages of 8086 over 8085 were numerous, and thats why everyone knows intel, and few people outside of retro computing enthusiasts and embedded systems engineers ever heard of zilog.

To perform a function or useful task we have to form a system by. It always contains one of the operands on which arithmeticlogic has to be performed. It is an 8 bit general purpose microprocessor that can easily store 64k bite of memory. Microprocessors and interfacing oup india oxford university press. The time for the back cycle of the intel 8085 a2 is 200 ns. Dec 12, 2011 the advantages of 8086 microprocessor are. In an instruction of 8085 microprocessor, how many bytes are present. Nonvectored interrupts are those in which vector address is not predefined. Block diagram of intel 8085 find notes the easy way. Microprocessor advantages and disadvantages study notes. This was introduced by the intel company in the year 1977 to 1990.

A microprocessor which has n data lines is called an nbit microprocessor i. Microprocessors 14 8085 is pronounced as eightyeightyfive microprocessor. Mov a, m data is transferred from the memory location pointed by the regiser to the accumulator. Complete notes of microprocessor with tutorials and solutions.

The microprocessor is one of most known subject is computer engineering branch. The 5 in the model was added as it requires plus 5 voltages. The address and data bus are multiplexed in this processor which helps in providing more control signals. The data is transferred from the address pointed by the data in a register to other register. It is an nmos device having around 6200 transistors contained in a 40 pin dip package. The builtin clock generator of 8085, in block schematic, is shown below. The advantages of the micro processor is that it small cheap to produce and is able to take over a lot of tasks that were time consuming to people. Information flows out of the microprocessor and into the memory or peripherals. It is a device or rather say a integrated chip which process some instructions given to it in microseconds. The 8086 microprocessor is available with clock frequency of 5, 8 and 10 megahertz. The intel 8085 eightyeightyfive is an 8bit microprocessor produced by intel and introduced. Each instruction of the 8085 processor consists of one to five machine cycles. You can also symbolically express addresses and values referenced in the operand field of instructions. The 8085 microprocessor is used ic 74ls373 to latch the address.

Two new instruction has been added in 8085, for taking advantage of added hardware it provides 16 address lines so. It includes the alu, register arrays and control circuit on a single chip. Functional block diagram of the 8085 microprocessor accumulator it is a 8. Adisesha 1 microprocessor microprocessor is defined as a silicon chip embedded with a central processing unit or cpu. It is also referred to as a computers logic chip, micro chip, and processor. The microprocessor has become more essential part of many gadgets. It is an appended version of the 8080 microprocessor. There are some disadvantages of microprocessor are given below, the microprocessor has a limitation on the size of data. What is the technology used in the manufacture of 8085. The 8085 8080aprogramming model includes six registers, one accumulator, and one flag register, as shown in figure. Lecture note on microprocessor and microcontroller. Advantages and disadvantages of microprocessor polytechnic hub.

For instance, a microprocessor with 3 ghz, shortly ghz is capable of performing 3 billion tasks per second. To transfer the data inside the chip from one place to another it has bus system just like our buses to. It means that its alu, internal register and most of the instructions are designed so that these can work on the 16 bit memory word. This io mapping scheme is regarded as an advantage, as it frees up the processors. It is a 40 pin c package fabricated on a single lsi chip. The microprocessor is a semiconductor device integrated circuit manufactured by the vlsi very large scale integration technique. 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 reason for the difference is that some actually most instructions have multiple different formats. The interrupting device gives the address of subroutine for these interrupts.

The students are studying the subject are supposed to learn the architecture of a typical microprocessor and also get general information about microprocessor based control systems. The main characteristics of 8086 microprocessor are as follows. The 8085 uses a total of 246 bit patterns to form its instruction set. Mar 16, 2020 in this article, we will discuss 8085 microprocessor pin configuration or pin diagram of 8085 or external architecture of 8085 microprocessor. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. This article discusses 8085 microprocessor architecture which includes features, stack pointer, address bus, data bus, instruction set, and addressing modes. It is an 8bit microprocessor designed by intel in 1977 using nmos technology. Its data bus is 8bit wide and hence, 8 bits of data can be transmitted in parallel from or to the microprocessor. In 8085 microprocessor, how many interrupts are maskable. Intel 8085 8bit microprocessor intel 8085 is an 8bit, nmos microprocessor. Kaushik and others published an introduction to microprocessor 8085 find, read and cite all the research you need on researchgate. Microprocessor is defined as a silicon chip embedded with a central processing unit or cpu.

Advantages of microprocessor high processing speed compact size easy maintenance can perform complex mathematics flexible can be improved according to requirement disadvantages of microprocessors overheating occurs due to overuse performance depends on size of data large board size than microcontrollers. Lecture note on microprocessor and microcontroller theory. S ome of the important second generation microprocessors are. Understanding 8085 8086 microprocessors and peripheral ics through questions and answers. The version 8085 a2 operates at a maximum frequency of 5 mhz. There are 5 interrupt pins in 8085 used as hardware interrupts, i. Intel 8085 8bit microprocessor shrimati indira gandhi. It was compatible with intel 8080 but needed less support of the hardware.

Intel 8085 microprocessor based system the microprocessor is a semiconductor device integrated circuit manufactured by the vlsi very large scale integration technique. Tutorial on introduction to 8085 architecture and programming. Intr is the only nonvectored interrupt in 8085 microprocessor. It is an intel microprocessor and also a 16 bit microprocessor. Microprocessor is that it can quickly move data between the various memory locations. Introduction to 8085 the advanced versions consume 20% less power supply. Advantages of microprocessors is that, these are general purpose electronic processing devices which can be programmed to execute a number of tasks. The 8085 8080a has six generalpurpose registers to store 8bit data.