8085 pin configuration pdf

Microprocessor 8085 pin configuration in microprocessor microprocessor 8085 pin configuration in microprocessor courses with reference manuals and examples pdf. Aug 08, 2018 due to this, 8085 starts execution of instructions from address 003ch which is the starting address of an interrupt service routine for rst 7. The minimum mode is a single processor configuration while the maximum mode is a multiple processor configuration. The following pin function descriptions are for the 80868288 system in maximum mode i. Address bus a15a8, it carries the most significant 8bits of memoryio address.

The program or the routine that is executed upon interrupt is called interrupt service routine isr. The time for the back cycle of the intel 8085 a2 is 200 ns. The resulting design includes 8085 cpu, 8251 usart, 32 kib sram, 32 kib or 16 kib rom. 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. To know the working of 8085 microprocessor, we should know the timing diagram of 8085 microprocessor. Control and status signals these signals are used to identify the nature of operation. Due to this reason, in the 40 pin ic of 8086 microprocessor, 8 pins i.

Once decoded, the instruction controls the remainder of the mpu, memory and io through the timing and control block. With help of timing diagram we can easily calculate the execution time of instruction as well as program. 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 a 40 pin dipdual in package ic by intel introduced in 1976. In this article you will get to know about the definition, architecture, block diagram and working of 8085 microprocessor. It uses 5v dc supply at v pin 40, and uses ground at v pin 1. Figure 1 shows the pin diagram of the 8085 microprocessor. Data bus ad7ad0, it carries the least significant 8bit address and data bus. Aug 05, 2019 8085 microprocessor pin diagram explanation pdf 1. The 8085 microprocessor is an 8bit general purpose processor that can deal with the memory of 64k byte. When power up the board, the 8085 fetches the instruction from the memory at location 0000h. The pins of a 8085 microprocessor can be classified into seven groups. Pin diagram of 8086 microprocessor is as given below.

In bellow the pin configuration of 8085 microprocessor is shown in figure. Microprocessor 8086 pin configuration tutorialspoint. The signals from the pins can be grouped as follows. Microprocessor 8085 pin configuration in microprocessor. Any module could be a processor capable of being a bus. The major features of 8085 chip are 8 bit data bus, 16 bit address bus, 3. 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. It is a 40 pin c package fabricated on a single lsi chip. Sep 18, 2017 the interrupt signal may be given to the processor by any external peripheral device to different interrupts pin in 8085 microprocessor. Only the pin functions which are unique to maximum mode are described. Interrupt structure in 8085 microprocessor electronics. 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. Mar 01, 2018 8085 processor pin diagram explanation. 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 of the microprocessor 8085 is shown in figure. The intel 8085 eightyeightyfive is an 8bit microprocessor introduced by intel in 1977. How many output pins are there in microprocessor 8085. The address bus has 8 signal lines a8 a15 which are. 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. The pin configuration and functional pin diagram of. Pin diagram of 8085 and pin description of 8085 free 8085. The following image depicts the pin 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. The intel 8085 is 8 bit size microprocessor produced by intel in the year 1976. Features of 8085 intel 8085 is an 8bit, nmos microprocessor. Appreciate the detailed explanation of address and data bus. The 8085 has extensions to support new interrupts, with three maskable interrupts rst 7.

Ad7ad0, it carries the least significant 8bit address and data bus. Microprocessor 8085 pin configuration electricalvoice. 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. Sep 08, 2017 for the love of physics walter lewin may 16, 2011 duration. The pins serve a particular function in minimum mode single. A15a8, it carries the most significant 8bits of memoryio address. 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 monitor program enables us to enter 8085 instruction using hex digit into the ram. Pin diagram and pin description of 8085 microprocessor.

Intel 8085 8bit microprocessor intel 8085 is an 8bit, nmos microprocessor. Minimal 8085 single board computer minimax8085 malinov. Microprocessor 8085 pin configuration in microprocessor tutorial. Configuration in microprocessor courses with reference manuals and examples pdf. Tutorial on introduction to 8085 architecture and programming. Pin configuration and signal group metafied assembly language program division of two 8bit number in. 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. Mc6800 microprocessor 8212 block diagram dice op200 microprocessor 8085 application mc6800 pin diagram op07 dac8043 ad5443 op77 text. Types of interrupts in 8085 interrupt structure of 8085. Let us understand 8085 microprocessor architecture with its internal modules or units.

Before go for timing diagram of 8085 microprocessor we should know some basic parameters to draw timing diagram of 8085 microprocessor. All the buses data, address, control are tristated. Pin diagram of 8085 microprocessor is as given below. Loosely coupled configuration has shared system bus, system memory, and system io. The entire group of instructions that a microprocessor supports is called instruction set. Microprocessor 8085 pin configuration tutorialspoint. Lecture note on microprocessor and microcontroller theory and. Address bus a8a15 the address bus pins are ranges from a8 to a15 and these are mainly. Draw the pin configuration and functional pin diagram of p 8085. Learn about the interrupts,maskable and nonmaskable interrupts. The location from 0000h to 7fffh or 32kb is rom space. Also learn about the various signals used in 8085 microprocessor including instructions such as rim, sim, sid, sod, iom. The pins of a 8085 microprocessor can be classified into seven.

It is an appended version of the 8080 microprocessor. Demultiplexing address and data bus using ale address latch enable. The following image depicts the pin diagram of 8085 microprocessor 8085 pin configuration. Figure 5pin diagram of 8085 ale address latch enable. Also pins 2 9 can be used as inputs only, while pins 12 19 can be used as either inputs or outputs. In this article, we will discuss 8085 microprocessor pin configuration or pin diagram of 8085 or external architecture of 8085 microprocessor. Pin configuration of 8085 microprocessor electronics. Sc cs iv semester microprocessor and its applications unit i introduction to microprocessor evolution of microprocessor general architecture of microprocessor system architecture of 8085 a pin configuration machine language and assembly language. The 8085 is an 8bit general purpose microprocessor that can address 64k byte of memory.

Pin diagram and description of 8086 microprocessor. Instruction set of 8085 an instruction is a binary pattern designed inside a microprocessor to perform a specific function. It reduces the number of components, allows for tweaking the configuration by reprogramming the spld, and provides an introduction to the. Its data bus width is 8bit and address bus width is 16bit, thus it can address 216 64 kb of memory. Learn about the pin diagram, description of 8085 microprocessor. The 20 lines of the address bus operate in multiplexed mode.