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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List the interrupts of microcontrollers.

The processor, its local memory and input output interfaces are together called computer module. Give the functional blocks of Scanned sensor matrix mode. Due to these buffers the address and data buses can be tri-stated when they are not in use. Nnotes a microprocessor has n-address pins then it can directly address 2n memory locations. What is based addressing mode? What is a Flag Register? The INTR is general interrupt request. The data transmission or reception can either asynchronously or synchronously.

What is the use of DMA address in ? Microprocessors and Microcontrollers The disadvantage of the decoded scan is that the number of combinations is only 4. Assume directive is useful to assume the segment nad during execution time.


This cross over connection is often called a null modem. It is a LIFO data segment.

Give the methods of checking errors Three methods are generally in common practice they are parity check, check sum, and cyclic redundancy check. Define miceoprocessor segment area? In loosely coupled systems, each processor has a set of input-output devices and a large local memory where it accesses most of the instructions and data. Parity flag and 5. Mini computers are used for business data processing, industrial control and scientific approach.


The basic blocks of a microprocessor are ALU, an array microcontrollee registers and a control unit. Distributed systems, research areas like in data acqusition. Hence data bus is bi- directional. Microprocessors and Microcontrollers The program called assembler is used to convert the pnemonics of instructions along with the data into their equivalent object code modules.

The biggest advantages of programmable devices are that they can be set up to perform specific functions by writing a code in its internal register. The largest and most powerful computers are called mainframes.


What is Interrupt request register IRR? What is Baud rate? SBUF Serial data buffer this register holds the data that has to be transmitted through the serial port and also holds the microcontrolleer that is received. Log In Sign Up. What are general purpose registers? SF is set if MSB of the result is one. The scan counter has two modes to scan the key matrix and refresh the display.


Due to this the width of program counter decides the maximum program length in bytes. What is meant by memory segmentation? The computing system designed using a microprocessor as its CPU is called microcomputer. The starting address is referred as interrupt vector or 3 interrupt pointer. The Zero flag sets microvontroller the result of operation in ALU is 0 and flag resets id result is non 0.

What is string-addressing mode? HL register pair also functions as data pointer or memory pointer. List out the signals of the microprocessor.