In this article, we will discuss 8085 microprocessor pin configuration or pin diagram of 8085 or external architecture of 8085 microprocessor. The following image depicts the pin diagram of 8085 microprocessor. Each instruction is represented by an 8bit binary value. The intel 8085ah is a complete 8bit parallel central processing unit cpu. Demultiplexing address and data bus using ale address latch enable. Like the pin configuration of 8085 microprocessor, the 8086 microprocessor also contains 40 pins dual in line however, unlike the 8085 microprocessor, an 8086 to have better performance, operates in 2 modes that are minimum and maximum mode. It is an appended version of the 8080 microprocessor. Pin description the following describes the function of each pin. In 8085 the interrupts are classified as hardware and software interrupts. It reduces the number of components, allows for tweaking the configuration by reprogramming the spld, and provides an introduction to the.
Kaushik and others published an introduction to microprocessor. A15a8, it carries the most significant 8bits of memoryio address. Pin diagram of 8085 microprocessor with description. Where the hmos is used for highspeed metal oxide semiconductor. Learn about the interrupts,maskable and nonmaskable interrupts. The signals from the pins can be grouped as follows.
The resulting design includes 8085 cpu, 8251 usart, 32 kib sram, 32 kib or 16 kib rom. The pin configuration and functional pin diagram of. Introduction to microprocessor 6 the 8085 interrupts the 8085 has 5 interrupt inputs. Also learn about the various signals used in 8085 microprocessor including instructions such as rim, sim, sid, sod, iom. The pentium pro processor is the sixth generation microprocessor i. It operates on 8bit data and uses 16bit address to access the memory. Pdf merger module used to merge the pdf file located under one directory. Lecture note on microprocessor and microcontroller theory. Pin diagram and pin description of 8086 microprocessor the following pin function descriptions are for the microprocessor 8086 in either minimum or maximum mode. Interrupt service routine isr a small program or a routine that. Intel 8086 microprocessor is the enhanced version of intel 8085 microprocessor. Pin diagram of 8085 video lecture of 8085 microprocessors chapter from microprocessor subject for electronics engineering students.
M io becomes valid in the t4 state preceding a bus cycle and remains valid until the final t4 of the cycle. It uses a gal16v8 atf16v8 simple programmable logic device spld instead of discrete logic ics for the address decode and the frequency divider for usart. When this pin is low, it accesses io and when high it access memory. The processor has attributes of both 8and 16bit microprocessors. Pin configuration of 8085 microprocessor electronics. Tutorial on introduction to 8085 architecture and programming. It is very important to know the pin configuration of 8085 microprocessor before study the 8085 microprocessor programming. Pin diagram 8085 microprocessor microprocessor youtube. Ad7ad0, it carries the least significant 8bit address and data bus. The entire group of instructions that a microprocessor supports is called instruction set.
Minimal 8085 single board computer minimax8085 malinov. It is directly compatible with 8086 software and 8080 8085 hardware and peripherals. Pin diagram and pin description of 8085 microprocessor. Default configured to the whole sites folder in drupal. Intel 8085 8bit microprocessor intel 8085 is an 8bit, nmos microprocessor. Mc6800 microprocessor 8212 block diagram dice op200 microprocessor 8085 application mc6800 pin diagram op07 dac8043 ad5443 op77 text. Intel 8085 is an 8bit, nmos microprocessor designed by intel in 1977.
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. Learn about the pin diagram, description of 8085 microprocessor. Micro processor 8085 questions and answers by ramesh kumar. Instruction set of 8085 an instruction is a binary pattern designed inside a microprocessor to perform a specific function. Microprocessor 8085 architecture in microprocessor. Draw the pin configuration and functional pin diagram of p 8085. Write an assembly language program of 8085 to combine two hex nibbles. The pins serve a particular function in minimum mode single processor mode and other function in maximum mode. Figure 1 shows the pin diagram of the 8085 microprocessor. The 8085 microprocessor is an 8bit general purpose processor that can deal with the memory of 64k byte.
These signals are used to identify the nature of operation. 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 microprocessor 8086 is a 16bit cpu available in different. Page 2 the atlas ii disk drive has two locations where user configurable jumpers are found. What is the pin diagram and function of each pin of 8085.
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. Use this information to get started using your internet and modem, and as a future reference for understanding the status and more advanced features available. Pdf an introduction to microprocessor 8085 researchgate. There are 5 interrupt pins in 8085 used as hardware interrupts, i. Draw the pin configuration and functional pin diagram of. Pin diagram and description of 8086 microprocessor. Pin diagram of 8085 microprocessor is as given below. D7 do z80cpu data bus bidirectional, tristate this bus is used to transfer all data and commands between the z80cpu and the z80pio. In bellow the pin configuration of 8085 microprocessor is shown in figure. Microprocessor 8085 pin configuration electricalvoice. There are 16 pins in the lcd module, the pin configuration us given below.
The 8086 operates in single processor or multiprocessor configuration to achieve high performance. It is a 40 pin c package fabricated on a single lsi chip. The following pin function descriptions are for the 80868288 system in maximum mode i. The pins of a 8085 microprocessor can be classified into seven groups. Actually it is known as update of the microprocessor. To study the various types of instructions provided by 8085 to study the pin diagram and the signals of various pins of 8085. Pin diagram of 8085 microprocessor with description 8085 is a general purpose microprocessor having 40 pins and works on single power supply. The 8086 microprocessor is a16bit, nchannel, hmos microprocessor. A number greater than this is to taken multiple times in 8 bit data bus. Intel 8086 is built on a single semiconductor chip and packaged in a 40 pin ic package. This pin is used to distinguish a memory access or an io accesses. The most significant 8 bits of the memory address or the 8 bits of the i0 address,3 stated. The microprocessor 8086 is a 16bit cpu available in different clock rates and packaged in a 40 pin dip or plastic package.
Nta is not an interrupt, it is used by the microprocessor for sending acknowledgement. It is an 8bit microprocessor which was introduced by intel in the year 1976 using nmos technology. Its data bus width is 8bit and address bus width is 16bit, thus it can address 216 64 kb of memory. Only the pin functions which are unique to maximum mode are described. Pin no name function 1 vss ground pin 2 vcc power supply pin of 5v 3 vee used for adjusting the contrast commonly attached to the potentiometer.
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