From the collection, a scannedin computerrelated tel 8085 9800301c 8080 8085 assembly language programming manual nov78. Demultiplexing address and data bus using ale address latch enable. Pin description the following describes the function of each pin. Jun 15, 2017 8085 microprocessor, generally pronounced as eightyeighty five microprocessor is an 8bit microprocessor. The intel 8085a is a new generation, complete 8 bit parallel central processing unit cpu. Generally and external devices are connected here which requests the microprocessor to perform a particular task. Microprocessor 8085 pin configuration electricalvoice. Pin diagram of 8085 microprocessor with description 8085 is a general purpose microprocessor having 40 pins and works on single power supply. Pin diagram of 8085 microprocessor is as given below.
Download free sample and get upto 48% off on mrprental. This pin resets the program counter to 0 and resets interrupt enable and hlda flipflops. Pin diagram of 8085 and pin description of 8085 free 8085. Intel 8085 microprocessor is the next generation of intel 8080 cpu family. The ebook has complete chapters on microprocessor and it is. Projects 8086 pin configuration 80x86 processors transducers 8086 architecture halleffect transducers intel 8085 optical materials bipolar transistors intel 8255 optoelectronic devices thermistors thevenins theorem maximum mode configuration of 8086 system assembly language programme of 80x86 processors power plant engineering prime. The address is split between the 8bit address bus and the 8bit data bus. To generate internal clock signals, 8085 microprocessor requires external inputs from x1 and x2 pins. The 8085a cpu and the 8080a are not pin compatible due to the. Pin diagram 8085 microprocessor microprocessor youtube. In this article, we will discuss 8085 microprocessor pin configuration or pin diagram of 8085 or external architecture of 8085 microprocessor. Additional copies of this manual or other intel literature may be obtained from.
The intel 8085 was softwarebinary compatible with the older 8080, with only a few minor instructions added. Instruction set of intel 8085 microprocessor consists of the following instructions. Clock oscillator and system controller were integrated. However, microprocessor, that were designed after 1978intel 8085, m6809, etc. Microprocessor 8085 pin configuration tutorialspoint. Pdf on aug 8, 2012, shree krishna khadka and others published a. The architecture of microprocessor 8085 can be divided into seven parts as follows.
Intel, alldatasheet, datasheet, datasheet search site for electronic components and. Interrupt service routine isr a small program or a routine that. Intel 8085 intel 8085 pin configuration signals and io pins 4 intel 8085 cpu block diagram the 8085 and its buses. Appreciate the detailed explanation of address and data bus. The processor has attributes of both 8and 16bit microprocessors. The modified versions of the 8085 processor have these minimum common features and functional similarities.
Mar 16, 2020 in this article, we will discuss 8085 microprocessor pin configuration or pin diagram of 8085 or external architecture of 8085 microprocessor. Kaushik and others published an introduction to microprocessor. Lecture note on microprocessor and microcontroller theory. If the operand is a memory location, its location is specified by the contents of the hl registers. It is a 40 pin c package fabricated on a single lsi chip. The following image depicts the pin diagram of 8085 microprocessor. Figure 1 shows the pin diagram of the 8085 microprocessor.
If ready is low, then the cpu has to wait for ready to go high. 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. Timing diagram of 8085 it is the graphical representation of process in steps with respect to. The intel 8085 was an 8bit microprocessor developed by intel and released in 1976 and was an evolutionary successor to the popular 8080, which can be considered as the chip that launched the pc into the mainstream. These signals are used to identify the nature of operation. If you continue browsing the site, you agree to the use of cookies on this website. It is a 40 pin dipdual in package ic by intel introduced in 1976. Learn 8085 microprocessor pin diagram in 2 minutes.
Pdf an introduction to microprocessor 8085 researchgate. Learn about the pin diagram, description of 8085 microprocessor. This signal indicates that the device is ready to send or receive data. In addition to being faster than the 8080, the 8085 had the following enhancements. 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. We are not sure how memorizing the pin diagram of intel 8085 is going to help us once we pass our microprocessor and interfacing exam.
Tutorial on introduction to 8085 architecture and programming. Its data bus width is 8bit and address bus width is 16bit, thus it can address 216 64 kb of memory. This uptodate and contemporary book is designed as a first level undergraduate text on microprocessors for the students of engineering computer science, electrical, electronics, telecommunication, instrumentation, computer applications and information technology. The signals from the pins can be grouped as follows. Pin configuration of 8085 microprocessor electronics engineering. The intel 8085 eightyeightyfive is an 8bit microprocessor produced by intel and introduced in march 1976. Nov 21, 2007 intel 8085 block diagram slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Intel 8085 microprocessor architecture mjpage design. And 16bit microprocessors it is directly compatible with 8086 software and 8080 8085 hardware and periph erals. With the help of 16bit address, 8085 can access 216 65536 64k memory locations. Only the pin functions which are unique to minimum mode are described. No p intel corpoutt intel corpoution intel products. Pin diagram and pin description of 8085 microprocessor.
In bellow the pin configuration of 8085 microprocessor is shown in figure. Ad7ad0, it carries the least significant 8bit address and data bus. Figure below shows the logic pin out of 8085 microprocessor. Intel 8085 8bit microprocessor intel 8085 is an 8bit, nmos microprocessor. There are 5 interrupt pins in 8085 used as hardware interrupts, i. The internal architecture of 8085 includes the alu, timing and control unit, instruction register and decoder, register array, interrupt control and serial io control. The 8085 is an 8bit general purpose microprocessor that can address 64k byte of memory. The intel 8088 is a high performance microprocessor implemented in.
Pin configuration of 8085 microprocessor electronics. This signal is used to reset all the connected devices when the microprocessor is reset ready. The steps in communicating with an io device are similar to those in. Media in category intel 8085 the following 35 files are in this category, out of 35 total. Nta is not an interrupt, it is used by the microprocessor for sending acknowledgement. It is a softwarebinary compatible with the morefamous intel 8080 with only two minor instructions added to support its added interrupt and serial inputoutput features. How many output pins are there in microprocessor 8085. Ice30 ice48 iceso ice8s insite intel intellec library manager mcs megachassis micromap multibus. The block diagram explaining the architecture of intel 8085 microprocessor is shown in fig. A15a8, it carries the most significant 8bits of memoryio address. Control transfer conditional, unconditional, call subroutine, return from subroutine and restarts. Pin diagram of 8085 microprocessor with description. However, it requires less support circuitry, allowing simpler and less expensive microcomputer systems to be built.
The microprocessor is one of most known subject is computer engineering branch. Features of 8085 intel 8085 is an 8bit, nmos microprocessor. Note that the 8086 has data bus width of 16bit, and it is able to address. It operates on 8bit data and uses 16bit address to access the memory. Pin configuration of the microprocessor 8085 is shown in figure. The pentium pro processor is the sixth generation microprocessor i. Microprocessor 8085 pin configuration in microprocessor. They are used for the most significant bit of memory address. 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.
The pins of a 8085 microprocessor can be classified into seven groups. It is directly compatible with 8086 software and 80808085 hardware and peripherals. Write an assembly language program of 8085 to combine two hex nibbles. Microprocessor 8085 pin configuration the following image depicts the pin diagram of 8085 microprocessor. It is an appended version of the 8080 microprocessor. This signal is used to reset the microprocessor by setting the program counter to zero resetout. It gives a clear exposition of the architecture, programming and interfacing and applications of 8085 microprocessor. Microprocessor 8085 pin configuration in microprocessor microprocessor 8085 pin configuration in microprocessor courses with reference manuals and examples pdf. It is used to distinguish a memory access from an io access. The time for the back cycle of the intel 8085 a2 is 200 ns. These x1 and x2 pins are also called crystal input pins.
Pin diagram of 8085 video lecture of 8085 microprocessors chapter from microprocessor subject for electronics engineering students. The 8085 have six generalpurpose registers to store 8bit data during program execution. Operations performed by 8085 the alu performs the arithmetic and logical operations. Pdf a notebook on microprocessor system researchgate. The serial data on this pin delivers its output to the seventh bit of the accumulator when sim instruction is executed. The following pin function descriptions are for the m80c86 in minimum mode i.
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