8259A Programmable Interrupt Controller: 8259A Programmable Interrupt Controller - Microprocessor-based system design requires many I/O devices such as keyboards, displays, sensors and other components. These devices should receive servicing in…
Pin Diagram of 8087 Processor: Figure 7.46 shows the pin diagram of 8087 processor. The operations of all pins of 8087 are explained below: AD15-AD0Â The AD15-AD0Â are the time multiplexed address/data…
8288 Bus Controller: Figure 5.37 shows the 8288 bus controller which is used in the maximum-mode operation of 8086 CPU. This IC receives four inputs such as SÌ…2, SÌ…1, SÌ…0Â status…
What is System Management Mode (SMM) of the Pentium Processor? In system management mode, the high power is used up by the Pentium processors. In this mode, the Pentium processors…
80186 Microprocessor Architecture: The Intel 80186 Microprocessor is a high-performance, highly integrated 16-bit microprocessors. Usually, the 80186 Microprocessor is intended for embedded systems, as microcontrollers with external memory. To reduce…
Interfacing ICs Articles: Features of 8255 Microprocessor: Here we see programmable peripheral interface (PPI), 8255, designed by Intel. It is a general purpose programmable I/O device used for parallel data…
8259 Programmable Interrupt Controller: The 8259 Programmable Interrupt Controller requires two types of command words. Initialization Command Words (ICWs) and Operational Command Words (OCWs). The 8259 Programmable Interrupt Controller can…
Interfacing 8259 with 8085: Fig. 14.72 shows Interfacing 8259 with 8085 microprocessor system. Addressing of 8259A : The 74LS138 address decoder will assert the CS input of the 8259A when…