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 rotating priority scheme, the priorities assigned to the channels are not fixed. What is Increment Decrement Address Latch? The controller manages data transfer between memory and a peripheral under its control, by passing the microprocessor.

The most common use of interrupt is microconrtoller relieve the CPU from the burden of polling. How queue is implemented in ? And bit binary number or code is called word. What is the use of UART? Due to this the width of program counter decides the maximum program length in bytes.


What is the function of zero flag in ? Stack top address is calculated using the contents of SS and SP registers. What are the major differences between and devices? What is a Flag Register? The microprocessor has to fetch read the data from memory or input device for cs22552 and after processing, it has to store write the data to memory or output device. Give some examples for maskable interrupts?


Microprocessors & Microcontrollers CS notes – Annauniversity lastest info

The speed at which serial data are transferred is referred to as the micfocontroller rate. Machine control flag register. 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.

The has six numbers of 8-bit FIFO registers, which is used for instruction queue.

Microprocessors and Micro controllers Two Marks with answers | Devasena A. –

Manufacturer fixes these vector addresses. UART is used to perform asynchronous communication. How can we initialize the ?

The masking status of an interrupt can be obtained by executing RIM instruction. What is memory-addressing mode?

What are the functions of DMA controllers? Usually a microprocessor will be the CPU of a system and it is called the brain of the computer. These errors need to be checked therefore additional information for error checking is sent during the transmission. It serves as a base register in indirect jumps, lookup table instruction and external data transfer.

In encoded mode, an external decoder should be used to decode the scan lines. How is the stack top address calculated? What is tri- state logic? What is Zero Flag? The ALU is the unit that performs the arithmetic or logical operations. What is defining of a macro? The is executing an ISR for servicing an interrupt and another interrupt occurs.


HL registers are also called scratch pad registers, Prepared by A. The RSC serial bus is usually terminated using either a 9-pin connector or a pin connector. Time delay procedure is used to design a specific delay. Double buffered means that one character can be loaded into a holding buffer while another character is being shifted out of the actual transmit shift register. This register is interconnected to two 8-bit shift registers.

If a same pin carries for both address bit and data bit in different time, then it is said to be multiplexed. In microprocessor system all devices are connected to a common bus.

When we are using closely coupled systmes? This mode is micropocessor in subroutine to address an array on a stack.

The instructions, which contain directions to the assembler are called assembler directives or pseudo operations. Why tri state logic is needed in microprocessor system? Explain the difference between a microprocessor and microcomputer.

Clearing DF causes instructions auto increment.