UNIVERSITY OF MADRAS
B.Sc. DEGREE COURSE IN ELECTRONICS SCIENCE
SEMESTER SYSTEM WITH CREDITS
(Effective from the Academic Year 2003-2004)

Semester V - Paper IX - Microprocessor I

Duration: 3 hrs
Maximum Marks: 100
Credits: 4

Unit-1

Architecture of 8085 microprocessor, registers, flags, ALU-Address bus and data bus-Demultiplexing address / data bus-Control and status signals-Control bus-Programmer's model of 8085-Pin-out signal function diagram-Functions of different pins.

Unit-2

Instruction set of 8085-data transfer, arithmetic, logic, branching and machine control group of instructions-Addressing modes-register, register indirect, direct, immediate and implied addressing modes.
Assembly language and machine language - Programming exercises - addition, subtraction, multiplication and division (all 8-bit) of binary and BCD numbers.

Unit-3

Stack and stack related operations-Subroutines-Advanced programming techniques: Code conversions - Binary to BCD, BCD to Binary, Binary to ASCII, ASCII to Binary, BCD to ASCII and ASCII to BCD, Block transfer, ascending order and descending order- Time delays using single register and register pair-Delay calculations-Debugging a program.

Unit-4

RAM, ROM, EPROM, EEPROM functional explanation-Memory interface, interfacing ROM, 2K X 8 and 4K X 8-Interfacing RAM, 2K X 8 and 4K X 8-Timing diagrams for memory read and memory write cycles-Instruction cycle, machine cycle and T-state.

Unit-5

Explanation of timing diagram for 8085 instructions, MOV R_d,R_s, MVI R, data 8, STA addr 16-Introduction of Wait states-Halt state-Dynamic RAM-Cache memory-Direct Memory Access(DMA), explanation with block diagram.

Book for study and reference