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MICROPROCESSORS AND INTERFACING DEVICES

LECTURE NOTES ON MICROPROCESSORS AND INTERFACING DEVICES III B. Tech II semester (JNTUH-R15) Mahendhar Reddy, Associate Professor, ECE ELECTRICAL AND ELECTRONICS ENGINEERING INSTITUTE OF AERONAUTICAL ENGINEERING (AUTONOMOUS) DUNDIGAL, HYDERABAD - 500 043 Syllabus: JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD L T/ /P/D C III Year ECE -II Sem 4 -/-/- 4 MICROPROCESSORS AND INTERRFACING DEVICES UNIT I 8086 MICROPROCESSOR: 8086 architecture- Functional Diagram, Register Organization, Memory segmentation, Memory addresses, physical memory organization, Signal descriptions of 8086-common function signals, Minimum and Maximum mode signals, Read Write cycles, Timing diagrams, Interrupt structure of 8086.

8085 is an 8 bit microprocessor, manufactured with N-MOS technology. It has 16-bit address bus and hence can address up to 216 = 65536 bytes (64KB) memory locations through A 0-A 15. The first 8 lines of address bus and 8 lines of data bus are multiplexed AD 0

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