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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In which 5 of the bits carry significant info in form of flags.

In immediate addressing mode the data 8-bit or bit is given as an operand. Generally minimum mode is opted for the smaller systems by means of single processor. The CPU clock periods of the minimum bus cycle is known as T state. The programs, which are used to convert any language into machine language, is referred to as tanslators. The different modes of operation of A can be selected by programming i. What is AC Flag? What is meant by simplex transmission? What is the use of UART?

Generally maximum mode is opted for the larger systems by means of more than one processor. Nots is the difference between segment register and general-purpose register?

What are the advantages of segmented memory? What are the interrupt type codes are in ? IP, BP and SP are the pointers microcontrolker contain offsets within the code, data and stock segments respectively. What is direct addressing mode? The various error conditions that can be checked from the status word are parity error, overrun error and framing error. Define total time delay. What are the internal devices of ?


Address bus is a unidirectional signal, and data bus is a bidirectional signal. The computing system designed using c2252 microprocessor as its CPU is called microcomputer. The size of the binary number used to address the memory decides the physical memory space.

Give the uses of mini computers. However if the transmission goes one ways at a time it Is called half duplex.


In the encoded mode the counter provides binary counter that is to be externally decoded to provide the scan lines for keyboard and display. Modems and other equipment used to send serial data over long distances are known as data communication equipment DCE. Simultaneous keyboard display operations Scanned sensor mode and scanned keyboard mode. Microprocessors and Microcontrollers 3.

What is the function of sign flag in ? The different scan modes of are decoded scan and encoded scan. What is a microcontroller?

The masking status of an interrupt can be obtained by executing RIM instruction. What is the use of segment directive? These task micrkprocessor performed by software, if the keyboard is interfaced through ports and they are performed by hardware if the keyboard is interfaced through This type of programming is called assembly language programming.


When is used for keyboard and display interfacing, it takes care of all task involved in keyboard scanning and display refreshing.

What is the function of parity flag in ? Then it executes the instruction to take appropriate action.

Multiplexing is the process of sharing the common bus to transmit abd than one kind of operation, at different instant of time. This is a 8 bit unidirectional buffer.

Microprocessors & Microcontrollers CS notes – Annauniversity lastest info

Interrupt priority IP register. DMA is an input technique commonly used for high speed data transfer between systems memory and external device. Why A is designed? Explain the rotating priority scheme? What is the difference between register and memory? In pipelined architecture, the processor will have number of functional units and execution time of functional units is overlapped.

It has two output modes. This technique is based on mathematical relationships of polynomials. IE also has a global disable bit, which disables all interrupts at once. Microprocessors and Microcontrollers Parity is defined by the number of ones in the accumulator. What is sign Flag?