INTERFACING �Multiplexed address-data bus lines are connected directly from the 8086 to 8087. �The status lines and the queue status lines connected directly from 8086 to 8087. �The Request/Grant signal RQ/GT0 of 8087 is connected to RQ/GT1 of 8086. �BUSY signal 8087 is connected to TEST pin of 8086. �Interrupt output INT of the 8087 […]
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Module 4 learning unit 10 of Microprocessors and Microcontrollers/Coprocessor part1.
Module 4 learning unit 10: Contents •Architecture of 8087 •Data types •Interfacing •Instructions and programming Overview Each processor in the 80 x 86 families has a corresponding coprocessor with which it is compatible. Math Coprocessor is known as NPX,NDP, FUP. Numeric processor extension (NPX), Numeric data processor (NDP), Floating point unit (FUP). Compatible Processor and […]
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Module 3 learning unit 9 of Microprocessors and Microcontrollers/Interfacing With 8086 part4.
Interfacing Analog to Digital Data Converters • In most of the cases, the PIO 8255 is used for interfacing the analog to digital converters with microprocessor. • We have already studied 8255 interfacing with 8086 as an I/O port, in previous section. This section we will only emphasize the interfacing techniques of analog to digital […]
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Module 3 learning unit 9 of Microprocessors and Microcontrollers/Interfacing With 8086 part3.
Interfacing a Microprocessor To Keyboard • When you press a key on your computer, you are activating a switch. There are many different ways of making these switches. An overview of the construction and operation of some of the most common types. 1. Mechanical key switches: In mechanical-switch keys, two pieces of metal are pushed […]
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Module 3 learning unit 9 of Microprocessors and Microcontrollers/Interfacing With 8086 part2.
• MODE 4: SOFTWARE TRIGGERED STROBE : • OUT will be initially high. When the initial count expires, OUT will go low for one CLK pulse and then go high again. The counting sequence is “triggered’‘ by writing the initial count. • GATE = 1 enables counting; GATE = 0 disables counting. GATE has […]
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Module 3 learning unit 9 of Microprocessors and Microcontrollers/Interfacing With 8086 part1.
Module 3 learning unit 9: PIO 8255 • The parallel input-output port chip 8255 is also called as programmable peripheral input-output port. The Intel’s 8255 is designed for use with Intel’s 8- bit, 16-bit and higher capability microprocessors. It has 24 input/output lines which may be individually programmed in two groups of twelve lines each, […]
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Module 3 Learning unit 8 of Microprocessors and Microcontrollers/Interfacing With 8086.
Module 3 Learning unit 8: Interface • We have four common types of memory: • Read only memory (ROM) • Flash memory (EEPROM) • Static Random access memory (SARAM) • Dynamic Random access memory (DRAM). • Pin connections common to all memory devices are: The address input, data output or input/outputs, selection input and control […]
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Module 1 and learning unit 4 of Microprocessors and Microcontrollers/Architecture of Microprocessors.
Module 1 and learning unit 4: Signal Description of 8086 •The Microprocessor 8086 is a 16-bit CPU available in different clock rates and packaged in a 40 pin CERDIP or plastic package. •The 8086 operates in single processor or multiprocessor configuration to achieve high performance. The pins serve a particular function in minimum mode (single […]
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Module 1: learning unit 3 of Microprocessors and Microcontrollers/Architecture of Microprocessors.
Module 1: learning unit 3 8086 Microprocessor •It is a 16-bit µp. •8086 has a 20 bit address bus can access up to 220 memory locations (1 MB). •It can support up to 64K I/O ports. •It provides 14, 16 -bit registers. •It has multiplexed address and data bus AD0- AD15 and A16 – A19. […]
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Module 1: learning unit 2 of Microprocessors and Microcontrollers/Architecture of Microprocessors
Module 1: learning unit 2 8085 Microprocessor Contents General definitions • Overview of 8085 microprocessor • Overview of 8086 microprocessor • Signals and pins of 8086 microprocessor The salient features of 8085 µp are: • It is a 8 bit microprocessor. • It is manufactured with N-MOS technology. • It has 16-bit address bus and […]
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