UNIT I THE MICROPROCESSOR. Microprocessor architecture- Addressing modes- Instruction set-Programming the Objective: To have an in. CS / CS42 / EC / CS / Micro Processors and Micro Controllers Complete Notes CSE,IT 4th Semester regulation EC Microprocessor and Microcontroller Lecture Notes All 5 Units – Free notes for Anna university 4TH sem Subject CS MICROPROCESSORS AND.

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Interrupt service routine is known as ISR. If the Is programmed for decoded scan then the output of scan lines will be decoded output if it is programmed for encoded scan then the output of scan lines will be binary count. What is register-addressing mode? After an ALU operation if the result has a even number of ones i. Parallel transmission of data microprcessor used for short distance where the speed of information transfer is critical. What is sign Flag? What are the internal devices of ?

Microprocessors & Microcontrollers CS notes – Annauniversity lastest info

What is the function of parity flag in ? All these interrupts are vectored interrupts. Give any two advantages of assembly language over machine language. What is a stack? What is the purpose of assembler directive statements? List out the signals of the microprocessor. Microprocessors and Microcontrollers Prepared by A. Give the function of special purpose registers in ?


The Execution unit executes the instructions microcntroller have already been fetched by the bus micocontroller unit BIU.

Bit set to 1 gives the accompanying interrupt a high prioritya 0 assigns low priority, interrupts with the highest priority can interrupt another interrupt with a lower priority; the lower priority interrupt continues after the higher is finished.

Any of the pointers and index register or BX may contain the offset of the location to be addressed. Strobbed input entry mode. Give the basic blocks of microprocessor. Direct and indirect are two types of port addressing mode. For a programmer, it is always best and better to write a program in a shortest length rather than longer, when a particular instructions in the program are repetitively coming.


What is the function of zero flag in ? The programs, which are used to convert any language into machine language, is referred to as tanslators. This flag is used for BCD operation.

What happens if two or more interrupts occurs at the same time?

How vector addresses are generated for software interrupts of ? Parity flag and 5. The method of defining the interrupt service routine for software as well as hardware interrupt is same.


List the parts of instruction format. PIC is used for data transfer between the peripheral and the microprocessor. Explain the difference between a microprocessor and microcomputer.



What is the use of instruction queue? List the advantages of processor? Assembler directive statements are used to pre assign values, reserve storage, assign names to constants jicroprocessor data structures and terminate a complication. Segment directive is useful in defining a section kof a program or a data entry.

What is RSC standard? Unidirectional is a one way access, and bidirectional is a two way access. It also provides information regarding various errors in the data received.

What is meant by multiplexing?

What are the functional units of ? It serves as a base microproceszor in indirect jumps, lookup table instruction and external data transfer. List the possibilities for S0, S1, S2 control signals in