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Microelectronics - Systems and Devices by Owen Bishop

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8

High-level languages

Summary
A high-level language program produces machine code from a program written in a form that is close to ordinary English. The many small steps of machine code and assembler are replaced by keywords that call up ready-made routines. Some languages use an interpreter, and others use a compiler. Two widely used high-level languages suitable for programming microelectronic devices are BASIC and C. Ladder logic is often used with PLCs.

Just as assembler is one stage removed from machine code, so the high-level languages are one stage removed from assembler. There are many high-level languages, a few of them very widely used, and several that have more specialist applications. CPUs can not understand high level ...

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