Note that the 8086 has data bus width of 16bit, and it is able to address. Assembly language assignment help, the pin diagram of 8088 microprocessor, pin diagram of 8088. Once decoded, the instruction controls the remainder of the mpu, memory and io through the timing and control block. A15a8, it carries the most significant 8bits of memoryio address. Instruction format programming of 8085 processor an instruction is a command to the microprocessor to perform a given task on a specified data. Therefore, the 8085 can access locations with numbers from 0 to 65,536.
Detailed explanation of pin description of 8085 microprocessor. For both high and low states, the output q draws a current from the input of the or gate. 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. Low output on this pin indicates that microprocessor has acknowledged the intr request. It is a 40 pin c package fabricated on a single lsi chip. Let me know if you need more study material for you course. The pin configuration and functional pin diagram of. Pin diagram of 8085 microprocessor sorting larger file with smaller ram how. Serial input output data using 8085 8085 microprocessor has two serial inputoutput pins that are used to readwrite one bit data to and from peripheral devices. Jun 15, 2017 8085 microprocessor, generally pronounced as eightyeighty five microprocessor is an 8bit microprocessor. It operates on 8bit data and uses 16bit address to access the memory. This course material is designed for those undertaking diploma.
Pin diagram of 8085 microprocessor is as given below. The 8085 microprocessor is an 8bit generalpurpose microprocessor having 40 pins which is capable of addressing 64 kb of memory. Mar 21, 2016 detailed explanation of pin description of 8085 microprocessor 1. Pin diagram and pin description of 8085 microprocessor. It is very important to know the pin configuration of 8085 microprocessor before study the 8085 microprocessor programming. Mar 01, 2018 8085 processor pin diagram explanation. It is a programmable multipurpose silicon chip, clock driven, register based, accepts binary data as input and provides output after processing it as per the instructions stored in the memory. The signals from the pins can be grouped as follows. Pin diagram of 8085 microprocessor with description. Draw the pin configuration and functional pin diagram of.
Introduction, features and pin diagram introduction to 8085 microprocessor. This processor can be built with electronic logic circuits that are fabricated using the technologies like vlsi very large scale integration or lsi large scale integration. This an output signal used to check the status of output device. Microprocessor is an electronic circuit that functions as the central processing unit cpu of a. Ad7ad0, it carries the least significant 8bit address and data bus. With the help of 16bit address, 8085 can access 216 65536 64k memory locations.
Microprocessors and interfacing 8086, 8051, 8096, and. Scribd is the worlds largest social reading and publishing site. Intel 8085 8bit microprocessor intel 8085 is an 8bit, nmos microprocessor. They are used for the most significant bit of memory address. It contains well written, well thought and well explained computer science and. It, also known as central processing unit cpu is like an artificial brain. The microprocessor acknowledges interrupt request by inta signal. Detailed explanation of pin description of 8085 microprocessor 1. The pins of a 8085 microprocessor can be classified into seven groups. Intel 8085 8bit microprocessor shrimati indira gandhi. Learn about the pin diagram, description of 8085 microprocessor. The most significant 8 bits of the memory address or the 8 bits of the i0 address,3 stated during hold and halt modes. All the buses data, address, control are tristated.
You can visit similar threads as well for more free pdf and get yourself updated. Pin diagram of 8085 and pin description of 8085 free 8085. The 8085 is an 8bit general purpose microprocessor that can address 64k byte of memory. When interrupt pin is activated, an isr will be called, interrupting the program that is currently executing. Microprocessor systems and applications 8085 cpu target group. It is an edge triggered highest priority, non mask able interrupt.
When the signal on this pin is low for at least 3 clocking cycles, it forces the microprocessor to reset itself. This indicates if any other device is requesting the use of. Information flows out of the microprocessor and into the memory or peripherals. Before go for timing diagram of 8085 microprocessor we should know some basic parameters to draw timing diagram of 8085 microprocessor. The pin diagram of 8088microprocessor, assembly language. Lecture note on microprocessor and microcontroller theory. To know the working of 8085 microprocessor, we should know the timing diagram 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 rst 7. The time for the back cycle of the intel 8085 a2 is 200 ns.
Learn about the interrupts,maskable and nonmaskable interrupts. Appreciate the detailed explanation of address and data bus. In bellow the pin configuration of 8085 microprocessor is shown in figure. Most of the 8088 pins and their functions are exactly similar to the corresponding pins of 8086. Microprocessor 8085 communicates via its address bus of 2bytes width the.
Draw the pin configuration and functional pin diagram of p 8085. Demultiplexing address and data bus using ale address latch enable. The following image depicts the pin diagram of 8085 microprocessor. After trap, restart occurs and execution starts from address 0024h. When the 8085 wants to access a peripheral or a memory location, it places the 16bit address on the. Detailed explanation and user discussion about architecture pin diagram. Assembly language assignment help, the pin diagram of 8088microprocessor, pin diagram of 8088. This is a 3byte instruction, the second byte specifies the loworder address and the third byte specifies the highorder address. Microprocessor 8086 pin configuration tutorialspoint.
A microprocessor is an integrated circuit ic which incorporates core functions of a computers central processing unit cpu. Microprocessor 8085 pin configuration tutorialspoint. Lecture note on microprocessor and microcontroller theory and. Pin configuration of 8085 microprocessor electronics. Its data bus width is 8bit and address bus width is 16bit, thus it can address 216 64 kb of memory. Pin diagram of 8085 microprocessor with description 8085 is a general purpose microprocessor having 40 pins and works on single power supply. Externally initiated signals inta it is an interrupt acknowledgment signal. Microprocessorsevolution and introduction to 8085 1 1.
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. Also learn about the various signals used in 8085 microprocessor including instructions such as rim, sim, sid, sod, iom. Reset in this signal is used to reset the microprocessor by setting the. With neat pin diagram explain the various signals of 8085. Architecture pin diagram 8085 microprocessor tutorials. Tutorial on introduction to 8085 architecture and programming. Microprocessor 8085 pin configuration the following image depicts the pin diagram of 8085 microprocessor. Microprocessor is a brain of every complex electronic gadget that is it is processing device of every computing device. With help of timing diagram we can easily calculate the execution time of instruction as well as program. The microprocessor 8086 is a 16bit cpu available in different clock rates and packaged in a 40 pin cerdip or plastic package. Sid serial input data line there is an one bit input line inside the 8085 cpu pin number 5 1 bit data can be.
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