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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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Give the functions of each segment register in ? Type 0, type 1, type 3. What is the function of mode set register? List out the signals of the microprocessor. Used as return instruction at the end of a service routine for both hardware and software interrupts.

The decoded outputs repeat the pattern ,, and Assume directive is useful to assume the segment type during execution time. The function is that the microprocessor should be able micdoprocessor read from and write into a given register of the memory chip. Define overlapped segment area?

How the serial data can be transmitted?

The data written into the registers is called as operation command words. CRC technique is commonly micfoprocessor when data are transferred from and to a floppy disk and in a synchronous data communication.


If two interrupts with the same priority occur at the same time, them they have the following ranking: The software interrupts of are vectored interrupts.


If an interrupt is initiated in a processor by an appropriate signal at the interrupt pin, then the interrupt is called hardware interrupt. These are called nested interrupts.

User defined software interrupts are initiated through INTR pin. Give the basic ways of getting data into memory. What are the constituents of BIU? As mentioned earlier, Microprocessor fetches the instruction from memory and executes them sequentially.

Anna University Chennai Cs – microprocessors and microcontrollers model question papers

It is used to drive external high Order address Bus AA8. The function of this register is to store the address of the starting memory location, which will be accessed by the DMA channel.

The major differences are as follows: For example, data bits may change because of noise or can be misunderstood by the receiver because of differences in receiver and transmitter clocks. Skip to main content. Each functional unit works independently most of the time.

What is an interrupt?

This stores all the interrupt requests those are being served, i. At the end of ISR, it restores the processor status and program control is transferred to main program.


What are the internal devices of ?

PF is set, if the result has even one’s. What miceoprocessor the various units in the architecture? Microprocessors and Microcontrollers The process of sending a zero to each row of a keyboard matrix and reading the columns for key actuation is called scanning. The disadvantages of machine level programming are as follows: ISR keeps a track of the requests being served.

What is the function of carry flag in ?

Microprocewsor are the interrupt type codes are in ? What are nested interrupts? In immediate addressing mode the data 8-bit or bit is given as an operand. What are the control words of A? The speed of the super computers are measured in MIPS Millions of instructions per second or Mega flops millions of floating point operations per second.

What are interrupt service routines? If trap flag is set, the processor enters the single trap execution.