Over view of microprocessor 8085 and its application. 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. This signal is used to reset the microprocessor by setting the program counter to zero resetout. While in the beginning i have tried to give a general view about this topic. The intel 8085 eightyeightyfive is an 8bit microprocessor produced by intel and introduced. It is directly compatible with 8086 software and 8080 8085 hardware and peripherals. To maximise the functions on the available pins, the 8085 uses a multiplexed addressdataad0ad7 bus. Generally and external devices are connected here which requests the microprocessor to perform a particular task. Pin diagram and pin description of 8085 microprocessor. Learn 8085 microprocessor pin diagram in 2 minutes.
If you continue browsing the site, you agree to the use of cookies on this website. Pin configuration of 8085 microprocessor electronics. You can visit similar threads as well for more free pdf and get yourself updated. How many output pins are there in microprocessor 8085.
Jun 15, 2017 8085 microprocessor, generally pronounced as eightyeighty five microprocessor is an 8bit microprocessor. Intel 8085 8bit microprocessor shrimati indira gandhi. Therefore the 8085 pin diagram, as well as signals, are discussed in detail. The pin configuration and functional pin diagram of. Microprocessor 8085 pin diagram pdf these advanced versions are designed using hmos. The 3rd book is a pdf file which you can download for free and read it. It is 40 pin ic, requires 3 mhz speed of operation and clock cycle is 320 ns. To connect with 8085 microprocessor, sign up for facebook today. The resulting design includes 8085 cpu, 8251 usart, 32 kib sram, 32 kib or 16 kib rom. Microprocessor 8085 architecture 8085 is pronounced as eightyeightyfive microprocessor. Microprocessor 8085 pin configuration in microprocessor microprocessor 8085 pin configuration in microprocessor courses with reference manuals and examples pdf. It is an 8 bit general purpose microprocessor that can easily store 64k bite of memory. The pins of a 8085 microprocessor can be classified into seven groups.
It reduces the number of components, allows for tweaking the configuration by reprogramming the spld, and provides an introduction to the. Microprocessor 8085 pin configuration electricalvoice. Dec 26, 2016 pin configuration of the microprocessor 8085 is shown in figure. Pin diagram of 8085 and pin description of 8085 free 8085. 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. Features of 8085 it is an 8 bit processor it is a single chip nmos device with 40 pins. Over view of microprocessor 8085 and its application doi. This is an active high, serial output port pin, used to transfer serial 1 bit data under software control. All the buses data, address, control are tristated. 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. Notes microprocessor 8085 pdf microprocessors and microcontrollersarchitecture of microprocessors.
Pin diagram of 8085 microprocessor with description. Its data bus width is 8bit and address bus width is 16bit, thus it can address 216 64 kb of memory. The microprocessor 8086 is a 16bit cpu available in different clock rates and packaged in a 40 pin cerdip or plastic package. Notes microprocessor 8085 pdf notes microprocessor 8085 pdf download. Evolution of microprocessor general architecture of microprocessor system architecture of 8085 a pin. 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 time for the back cycle of the intel 8085 a2 is 200 ns.
Note that the 8086 has data bus width of 16bit, and it is able to address. The microprocessor 8086 is a 16bit cpu available in different clock rates and packaged in a 40 pin cerdip or. In the world of personal computers, the terms microprocessor and cpu are used interchangeably. Pin configuration of the microprocessor 8085 is shown in figure. A15a8, it carries the most significant 8bits of memoryio address. The 6808 and 8085, hdsp211x to an intel 8085 microprocessor. Microprocessor 8085 pin configuration tutorialspoint. In this article let us discuss in detail about the various signals involved in transferring data and executing instructions in microprocessor.
It operates on 8bit data and uses 16bit address to access the memory. With the help of 16bit address, 8085 can access 216 65536 64k memory locations. It is very important to know the pin configuration of 8085 microprocessor before study the 8085 microprocessor programming. After execution of the new program, microprocessor goes. Keeping both these things in mind, we devised this little brain hack which is all you need to learn the pin diagram of the 8085 microprocessor. When the 8085 wants to access a peripheral or a memory location, it places the 16bit address on the. Pin diagram of 8085 microprocessor is as given below. My efforts and wholehearted cocorporation of each and everyone has ended on a. Ad7ad0, it carries the least significant 8bit address and data bus.
It was compatible with intel 8080 but needed less support of the hardware. Microprocessors 14 8085 is pronounced as eightyeightyfive microprocessor. To access complete course of microprocessor microprocessor. Minimal 8085 single board computer minimax8085 malinov. Lecture note on microprocessor and microcontroller theory. 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. The 8085 is one of intels earliest microprocessors. It is a 40 pin c package fabricated on a single lsi chip.
Lecture note on microprocessor and microcontroller theory and. In bellow the pin configuration of 8085 microprocessor is shown in figure. Instruction set of 8085 an instruction is a binary pattern designed inside a microprocessor to perform a specific function. The processor has attributes of both 8and 16bit microprocessors. We are not sure how memorizing the pin diagram of intel 8085 is going to help us once we pass our microprocessor and. Microprocessor books for ece, microprocessor systems books pdf, top books for microprocessor systems on may 30, 2014 by satyenhacks. It includes the alu, register arrays and control circuit on a single chip. For both high and low states, the output q draws a current from the input of the or gate. Draw the pin configuration and functional pin diagram of p 8085.
This was introduced by the intel company in the year 1977 to 1990. It is an 8bit microprocessor designed by intel in 1977 using nmos technology. Unit no topics 8085 microprocessor architecture, flags, 8085 pin configuration and function of each pin. Information flows out of the microprocessor and into the memory or peripherals. However, it requires less support circuitry, allowing simpler and less expensive microcomputer systems to be built. When another device in microcomputer system wants to use the address and data bus, it sends hold request to cpu through this pin. The 8085 has five interrupt signals that can be used to interrupt a program. From the collection, a scannedin computerrelated document. Microprocessor 8085 pin configuration in microprocessor. Each instruction is represented by an 8bit binary value. In this mode, the microprocessor chip itself gives out all the control signals. I have made this report file on the topic 8085 microprocessor. Mar 16, 2020 in this article, we will discuss 8085 microprocessor pin configuration or pin diagram of 8085 or external architecture of 8085 microprocessor.
This is the serial op data, and the data on this pin sends its output toward the 7thbit of the accumulator whenever an instruction of sim is performed. Pin diagram of 8085 video lecture of 8085 microprocessors chapter from microprocessor subject for electronics engineering students. Mar 04, 2014 learn 8085 microprocessor pin diagram in 2 minutes guaranteed. Therefore, the 8085 can access locations with numbers from 0 to 65,536. Pin diagram of 8085 microprocessor sorting larger file with smaller ram how. Intel 8085 8bit microprocessor intel 8085 is an 8bit, nmos microprocessor.
Understand the concept of interfacing using various interfacing chips with 8085. It is an appended version of the 8080 microprocessor. Pin diagram 8085 microprocessor microprocessor youtube. If ready is low, then the cpu has to wait for ready to go high. This is a 3byte instruction, the second byte specifies the loworder address and the third byte specifies the highorder address.
The signals from the pins can be grouped as follows. It is directly compatible with 8086 software and 80808085 hardware and peripherals. The entire group of instructions that a microprocessor supports is called instruction set. The 5 in the model was added as it requires plus 5 voltages. Microprocessor 8085 notes free download as word doc. Microprocessor 8085 pin configuration the following image depicts the pin diagram of 8085 microprocessor. Clock signals pin 1 and pin 2 input and pin 37output x1 and x2 and are clock input pins also called as crystal.
The following image depicts the pin diagram of 8085 microprocessor. Figure 1 shows the pin diagram of the 8085 microprocessor. In this article, we will discuss 8085 microprocessor pin configuration or pin diagram of 8085 or external architecture of 8085 microprocessor. It is a 40 pin dipdual in package ic by intel introduced in 1976.
Each signal inputoutput pin on the mc68a40that must be connected to an 8085 pin is explained in, bits, a8, a9 and a10, result in seven address bits to specify an io. This signal indicates that the device is ready to send or receive data. Microprocessor 8086 pin configuration tutorialspoint. The 8085 and its busses the 8085 is an 8bit general purpose microprocessor that can address 216 64k byte of memory. I have tried my best to elucidate all the relevant detail to the topic to be included in the report. Apr 15, 2018 pin diagram of 8085 video lecture of 8085 microprocessors chapter from microprocessor subject for electronics engineering students. The intel 8085 eightyeightyfive is an 8bit microprocessor produced by intel and introduced in march 1976. Object oriented system analysis and design chapter 5. This signal is used to reset all the connected devices when the microprocessor is reset ready. Pin diagram of 8086 microprocessor is as given below. They are used for the most significant bit of memory address. When interrupt pin is activated, an isr will be called, interrupting the program that is. Microcontroller instruction set, 8051 microcontroller pdf, 8051 microcontroller tutorial, 80ramesh gaonkar solution pdf.
Tutorial on introduction to 8085 architecture and programming. Microprocessor books for ece download free pdf files. Nov 21, 2007 intel 8085 block diagram slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Pin diagram of 8085 microprocessor with description 8085 is a general purpose microprocessor having 40 pins and works on single power supply.
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