It is an appended version of the 8080 microprocessor. Apr 12, 2019 8085 microprocessor pin diagram explanation pdf 1. Once decoded, the instruction controls the remainder of the mpu, memory and io through the timing and control block. The 20 lines of the address bus operate in multiplexed mode. Pin configuration of 8085 microprocessor electronics. The memory, address bus, data buses are shared resources. Like the pin configuration of 8085 microprocessor, the 8086 microprocessor also contains 40 pins dual in line.
Appreciate the detailed explanation of address and data bus. The time for the back cycle of the intel 8085 a2 is 200 ns. Microprocessor 8085 architecture in microprocessor tutorial. It is a 40 pin c package fabricated on a single lsi chip. When the signal on this pin is low for at least 3 clocking cycles, it forces the microprocessor to reset itself.
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. The signals from the pins can be grouped as follows. Mar 16, 2020 in this article, we will discuss 8085 microprocessor pin configuration or pin diagram of 8085 or external architecture of 8085 microprocessor. Pin configuration and signal group metafied assembly language program division of two 8bit number in. Draw the pin configuration and functional pin diagram of. Microprocessor 8086 pin configuration tutorialspoint. Before go for timing diagram of 8085 microprocessor we should know some basic parameters to draw timing diagram of 8085 microprocessor. Pin diagram of 8085 microprocessor is as given below. Microprocessor 8085 pin configuration the following image depicts the pin diagram of 8085 microprocessor. In this article, we will discuss 8085 microprocessor pin configuration or pin diagram of 8085 or external architecture of 8085 microprocessor. Pin diagram of 8085 and pin description of 8085 free 8085.
How many output pins are there in microprocessor 8085. A15a8, it carries the most significant 8bits of memoryio address. Pin diagram and pin description of 8086 microprocessor the following pin function descriptions are for the microprocessor 8086 in either minimum or maximum mode. However, unlike the 8085 microprocessor, an 8086 to have better performance, operates in 2 modes that are minimum and maximum mode. Figure 1 shows the pin diagram of the 8085 microprocessor. The 8085 has extensions to support new interrupts, with three maskable interrupts rst 7. It is a 40 pin dipdual in package ic by intel introduced in 1976. Actually it is known as update of the microprocessor. These signals are used to identify the nature of operation. The pins of a 8085 microprocessor can be classified into seven groups. Microprocessor 8085 pin configuration tutorialspoint. Intel 8085 8bit microprocessor intel 8085 is an 8bit, nmos microprocessor. It provides serial interfacing with serial input data sid and serial output. Jun 15, 2017 8085 microprocessorpin diagram and configuration june 15, 2017 june 15, 2017 mithila devi 8085 microprocessor, generally pronounced as eightyeighty five microprocessor is an 8bit microprocessor.
It is an 8bit microprocessor which was introduced by intel in the year 1976 using nmos technology. Draw the pin configuration and functional pin diagram of p 8085. The lower 8bits address a0a7 is multiplexed with data bus d0d7. 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. Ad7ad0, it carries the least significant 8bit address and data bus. 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. The following image depicts the pin diagram of 8085 microprocessor. Pin diagram and description of 8086 microprocessor. Tutorial on introduction to 8085 architecture and programming.
Microprocessor 8085 pin configuration in microprocessor. The processor has attributes of both 8and 16bit microprocessors. To know the working of 8085 microprocessor, we should know the timing diagram of 8085 microprocessor. These x1 and x2 pins are also called crystal input pins. Pin diagram of 8085 microprocessor with description 8085 is a general purpose microprocessor having 40 pins and works on single power supply. Maximum mode 8086 system here, either a numeric coprocessor of the type 8087 or another processor is interfaced with 8086. Pin diagram of 8085 microprocessor with description. Microprocessor 8085 pin configuration in microprocessor microprocessor 8085 pin configuration in microprocessor courses with reference manuals and examples pdf. Demultiplexing address and data bus using ale address latch enable. In bellow the pin configuration of 8085 microprocessor is shown in figure. Learn about the pin diagram, description of 8085 microprocessor. With help of timing diagram we can easily calculate the execution time of instruction as well as program. The major features of 8085 chip are 8 bit data bus, 16 bit address bus, 3.
Pin diagram of 8086 microprocessor is as given below. To generate internal clock signals, 8085 microprocessor requires external inputs from x1 and x2 pins. 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. The pin configuration and functional pin diagram of. It is used to know the type of current operation of the microprocessor. Microprocessor 8085 pin configuration electricalvoice. Also includes some projects that have been worked upon and also episodes to embedded system podcast. The microprocessor 8086 is a 16bit cpu available in different clock rates and packaged in a 40 pin cerdip or plastic package.
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