Microprocessor and microcontroller seminar report notes pdf ppt download abstract. The processor has attributes of both 8and 16bit microprocessors. In the world of personal computers, the terms microprocessor and cpu are used interchangeably. 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. Appreciate the detailed explanation of address and data bus. Microprocessor 8085 architecture in microprocessor tutorial. To know the working of 8085 microprocessor, we should know the timing diagram of 8085 microprocessor. Pin diagram of 8086 microprocessor is as given below. Mvi b, 3eh move the data 3eh given in the instruction to b register. Maximum mode 8086 system here, either a numeric coprocessor of the type 8087 or another processor is interfaced with 8086. The lower 8bits address a0a7 is multiplexed with data bus d0d7. The clk out signal obtained from pin 37 of 8085 is used for synchronizing external devices. Microprocessor 8085 pin configuration the following image depicts the pin diagram of 8085 microprocessor.
Actually it is known as update of the microprocessor. This signal is used to reset all the connected devices when the microprocessor is reset ready. Each microprocessor has a fixed set of instructions in the. How many output pins are there in microprocessor 8085. Figure 1 shows the pin diagram of the 8085 microprocessor. Microprocessor 8085 pin configuration in microprocessor microprocessor 8085 pin configuration in microprocessor courses with reference manuals and examples pdf. It is a 40 pin c package fabricated on a single lsi chip.
For both high and low states, the output q draws a current from the input of the or gate. 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. Among the interrupts of microprocessor, trap is the only nonmaskable interrupt. Pin configuration of the microprocessor 8085 is shown in figure. Microprocessor 8086 pin configuration tutorialspoint. 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 reset out sod sid trap rst 7. Let us understand 8085 microprocessor architecture with its internal modules or units. Pin configuration of 8085 microprocessor electronics.
It is a 40 pin dipdual in package ic by intel introduced in 1976. You can visit similar threads as well for more free pdf and get yourself updated. The time for the back cycle of the intel 8085 a2 is 200 ns. Tutorial on introduction to 8085 architecture and programming halt. Apr 12, 2019 8085 microprocessor pin diagram explanation pdf 1.
The major features of 8085 chip are 8 bit data bus, 16 bit address bus, 3. The memory, address bus, data buses are shared resources. Pin diagram of 8085 and pin description of 8085 free 8085. Pin diagram and pin description of 8085 microprocessor.
These x1 and x2 pins are also called crystal input pins. Before go for timing diagram of 8085 microprocessor we should know some basic parameters to draw timing diagram of 8085 microprocessor. Jun 15, 2017 8085 microprocessor, generally pronounced as eightyeighty five microprocessor is an 8bit microprocessor. Learn about the pin diagram, description of 8085 microprocessor. If ready is low, then the cpu has to wait for ready to go high. In bellow the pin configuration of 8085 microprocessor is shown in figure. To study the various types of instructions provided by 8085 to study the pin diagram and the signals of various pins of 8085. Microprocessor 8085 notes free download as word doc. Microprocessor 8085 simulator software kit free download. The pin configuration and functional pin diagram of. Pin diagram of 8085 video lecture of 8085 microprocessors chapter from microprocessor subject for electronics engineering students. This signal indicates that the device is ready to send or receive data. A15a8, it carries the most significant 8bits of memoryio address. The following image depicts the pin diagram of 8085 microprocessor.
P is a digital electronic component with miniaturized transistors on a single semiconductor integrated circuit icone or more microprocessors typically. Ad7ad0, it carries the least significant 8bit address and data bus. The 8085 has extensions to support new interrupts, with three maskable interrupts rst 7. Any module could be a processor capable of being a bus. Demultiplexing address and data bus using ale address latch enable. The 8085 is an 8bit general purpose microprocessor that can address 64k byte of memory. The details of each pin connected with this block are described below, chip select a low on this input pin enables the communication between the 8085 and mpu. 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. Mar 16, 2020 in this article, we will discuss 8085 microprocessor pin configuration or pin diagram of 8085 or external architecture of 8085 microprocessor. 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 reset out sod sid trap. With neat pin diagram explain the various signals of 8085. Aug 05, 2019 among the interrupts of microprocessor, trap is the only nonmaskable interrupt. A microprocessor communicates and operates in the binary 0s and 1s, called bits.
Draw the different clock circuits which can be connected to pins 1. Pin diagram of 8085 microprocessor is as given below. It is a device or rather say a integrated chip which process some instructions given to it in microseconds. Intel 8085 8bit microprocessor intel 8085 is an 8bit, nmos microprocessor. Tutorial on introduction to 8085 architecture and programming. Apr 15, 2018 pin diagram of 8085 video lecture of 8085 microprocessors chapter from microprocessor subject for electronics engineering students. The intel 8085 microprocessor is a second generation microprocessor and is an eightbit processor designed in the year of 1976 with the nmos technology with a 40 pin dip, approximately consisting 6500 transistors having a power supply of 5v. Pin diagram 8085 microprocessor microprocessor duration. In this article, we will discuss 8085 microprocessor pin configuration or pin diagram of 8085 or external architecture of 8085 microprocessor.
It is directly compatible with 8086 software and 80808085 hardware and peripherals. It is an appended version of the 8080 microprocessor. Microprocessor 8085 architecture in microprocessor. Microprocessor 8085 pin configuration tutorialspoint. The 20 lines of the address bus operate in multiplexed mode. Loosely coupled configuration has shared system bus, system memory, and system io. The signals from the pins can be grouped as follows. When the signal on this pin is low for at least 3 clocking cycles, it forces the microprocessor to reset itself. Draw the pin configuration and functional pin diagram of p 8085. The pins of a 8085 microprocessor can be classified into seven groups. The address and data bus are multiplexed in this processor which helps in providing more control signals. To generate internal clock signals, 8085 microprocessor requires external inputs from x1 and x2 pins. These signals are used to identify the nature of operation.
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