RFID Technology is an abbreviation used for Radio Frequency IDentification technology. RFID technology is a unique mode that offers automatic identification and tracking of objects or entities by making use of radio-frequency waves. This technology is known to be a combination of radio broadcast technology and radar. In the 1980s, it has gained immense popularity …
8284 clock generator is an IC developed by Intel to provide clock frequency, ready and reset signal to the 8086/8088 microprocessor. It is an 18 pin chip. 8284 produces the clock signal, synchronizes it with the ready and reset signal and provides it to the microprocessor. Functions of 8284 It provides a stable clock to …
Definition: Assembler directives are the instructions used by the assembler at the time of assembling a source program. More specifically, we can say, assembler directives are the commands or instructions that control the operation of the assembler. Assembler directives are the instructions provided to the assembler, not the processor as the processor has nothing to …
Assembly language programming is a low-level programming language in which the instructions are written in the form of mnemonics. More simply, we can say the language in the form of mnemonics is known as assembly language. This programming language allows the creation of human-readable program equivalent to machine code. Now a question arises: What are …
Definition: Semiconductor memory is the main memory element of a microcomputer-based system and is used to store program and data. The main memory elements are nothing but semiconductor devices that stores code and information permanently. The semiconductor memory is directly accessible by the microprocessor. And the access time of the data present in the primary …
We know that instructions are the binary commands used for the execution of any operation. In the previous article, we have discussed the instruction set of the 8085 microprocessor. Here in this article, we will discuss the instruction set supported by the 8086 microprocessor. 8086 supports various instructions including those supported by 8085. However, 8086 …
8251 USART is a universal synchronous and asynchronous controller designed by Intel basically to facilitate communication. USART stands for Universal Synchronous and Asynchronous Receiver Transmitter and functions as an intermediary that allows serial and parallel communication between the microprocessor and the peripheral devices. We know that microprocessors allow parallel communication. And in parallel communication, the …
Interrupts are the signals that are generally produced by the devices externally connected to the microprocessor, requesting for the services. Whenever an interrupt request is generated in the system then it must not be neglected and be acknowledged as soon as possible. Basically whenever an interrupt is generated then the microprocessor suspends its current execution …
Programmable interrupt controllers are used to enhance the number of interrupts of a microprocessor. 8259 is a programmable interrupt controller which shows compatibility with 8085 microprocessor. It is also known as a priority interrupt controller and was designed by Intel to increase the interrupt handling ability of the microprocessor. An 8259 PIC never services an …
8255 is a programmable I/O device that acts as interface between peripheral devices and the microprocessor for parallel data transfer. 8255 PPI (programmable peripheral interface) is programmed in a way so as to have transfer of data in different conditions according to the need of the system. In 8255, 24 pins are assigned to the …