8085 pin diagram and architecture pdf free

This is an active high, serial input port pin, used to accept serial 1 bit data under software control. Tutorial on introduction to 8085 architecture and programming. Microprocessors darshan institute of engineering and technology. The reason for the difference is that some actually most instructions have multiple different formats. Microprocessor 8085 pin configuration the following image depicts the pin diagram of 8085 microprocessor.

The pins of a 8085 microprocessor can be classified into seven groups. The intel 8085 eightyeightyfive is an 8bit microprocessor introduced by intel in 1977. It is the set of instructions that the microprocessor can understand. All these hardware modules as part of 8085 architecture have been shown in the figure with its respective pins used in 8085 chip. The signals from the pins can be grouped as follows. Ppt the 8085 microprocessor architecture powerpoint. Processing unit consists of alu, accumulator, status flags and temporary register. The functional block diagram or architecture of 8085 microprocessor gives the complete details about a. Microprocessor 8085 architecture in microprocessor. Actually it is known as update of the microprocessor. A15a8, it carries the most significant 8bits of memoryio address. It is a 40 pin c package fabricated on a single lsi chip. The following image depicts the pin diagram of 8085 microprocessor.

Draw and explain the architecture of 8085 microprocessormay06. Pin diagram of 8085 microprocesoor free download as powerpoint presentation. Lecture note on microprocessor and microcontroller theory vssut. Ad7ad0, it carries the least significant 8bit address and data bus. Tutorial on introduction to 8085 architecture and programming halt. Microprocessors and interfacing 8086, 8051, 8096, and. The serial data on this pin is loaded into the seventh bit of the accumulator when rim instruction is executed. Microprocessor 8085 pin configuration tutorialspoint. The 8085 uses a total of 246 bit patterns to form its instruction set. Pin diagram of 8085 microprocessor is as given below.

It is an 8bit microprocessor which was introduced by intel in the year 1976 using nmos technology. Cpu central processing unit alu arithmeticlogic unit control logic registers, etc memory input output interfaces processor system architecture interconnections between these units. The microprocessor is one of most known subject is computer engineering branch. The pin configuration and functional pin diagram of. Pin description of 8085contd page2 the microprocessor is a clockdriven semiconductor device consisting of electronic logic circuits manufactured by using either a largescale integration lsi or verylargescale integration vlsi technique. This article discusses what is a 8085 microprocessor, pin configuration of 8085, which includes address bus, interrupts, rd, wr, ready, hold, hlda, intr. Broadly 8085 architecture consists of three units viz. Both the temporary registers as well as accumulators are utilized for holding the information throughout in the operations then the.

V cc hold hlda clkout reset in ready iom s 1 rd ale s 0 a 15 a 14 a a 12 a 11 a 10 a 9 a 8 wr x 1 x 2. Pin diagram of 8085 microprocessor computer science. Refer functions of all the 8085 pins below in the table. With neat pin diagram explain the various signals of 8085. 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. Based on their specification, application and architecture microprocessors are classified. The ebook has complete chapters on microprocessor and it is. It determines the number of operations per second the processor can perform. The 8085 in cludes on its chip most of the logic circuitry for per forming computing tasks and for communicating with peripherals.

Intel 8085 8bit microprocessor intel 8085 is an 8bit, nmos microprocessor. Buy microprocessor 8085 architecture, programming and interfacing by ajay wadhwa pdf online. This signal can be used as the system clock for other devices. Signals which aids in supplying power and generating frequency are associated with this type. This pin resets the program counter to 0 and resets interrupt enable and hlda flipflops. The 8085 is an 8bit general purpose microprocessor that can address 64k byte of memory. Microprocessor 8085 architecture, programming and interfacing. The address and data bus are multiplexed in this processor which helps in providing more control signals.

It is the number of bits processed in a single instruction. Its data bus width is 8bit and address bus width is 16bit, thus it can address 216 64 kb of memory. It has 16 address lines, therefore it can access 216 64k bytes of memory. Pin diagram of 8085 microprocesoor central processing. Microprocessor mcq questions instrumentation tools. The 8085 machine language the 8085 from intel is an 8bit microprocessor. Pin description of 8085 contd page2 the microprocessor is a clockdriven semiconductor device consisting of electronic logic circuits manufactured by using either a largescale integration lsi or verylargescale integration vlsi technique. Draw the pin configuration and functional pin diagram of. The 8086 architecture has 6byte instruction prefetch queue. A number greater than this is to taken multiple times in 8 bit data bus.

Pin diagram and pin description of 8085 microprocessor. To perform addition of two 8 bit numbers using 8085. This distinguishes whether the address is for memory or io. Apr 28, 2020 pin diagram of 8085 microprocessor computer science engineering cse video edurev is made by best teachers of computer science engineering cse. Pin diagram of 8085 and pin description of 8085 free 8085. Interrupt the 8085 addresses the same amount of memory, executed about the same. These signals are used to identify the nature of operation. Pdf 8085 microprocessor architecture and instruction set. The 8085 microprocessor architecture the 8085 and its busses the 8085 is an 8bit general purpose microprocessor that can address 64k byte of memory. Before knowing about the 8085 architecture in detail, lets us briefly discuss about the basic features of 8085 processor 8085 microprocessor is an 8bit microprocessor with a 40 pin dual in line package. For both high and low states, the output q draws a current from the input of the or gate. Lecture note on microprocessor and microcontroller theory. In this tutorial, we will discuss the architecture, pin diagram and other key.