In computing, a programmable interrupt controller (PIC) is an integrated circuit that helps a microprocessor (or CPU) handle interrupt requests (IRQ) coming from a number of different sources (like external I/O gadgets) which can happen simultaneously.[1] It helps prioritize IRQs so that the CPU switches execution to probably the most applicable interrupt handler (ISR) after the PIC assesses the IRQ’s relative priorities. Widespread modes of interrupt precedence embody hard priorities, rotating priorities, and cascading priorities.[citation needed] PICs often allow mapping enter to outputs in a configurable approach. On the Laptop architecture PIC are sometimes embedded right into a southbridge chips whose internal structure is defined by the chipset vendor’s requirements.
It’s a low degree language and it’s much like assembler language programming. IL consists of many strains of code where every line represents exactly one operation. If this program is written utilizing IEC defined instructions, the program might be moved simply to totally different IEC compliant PLCs. IL is properly fitted to small functions which involve simple mathematical features. This language is far more compact and requires much less space within the PLC memory.
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