arithmetic-logic unit

arithmetic-logic unit

[ə¦rith·mə‚tik ′läj·ik ‚yü·nət]
(computer science)
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MSI (medium-scale integration) multiplexers, counters, registers, and decoders, and SST (small-scale integration) flip-flops and asynchronous combinatorial gates made up for microcontroller's limited I/O and built-in functions beyond those of the core ALU (arithmetic-logic unit).
That's not to say it will be easy: Although the manufacturing yield for subunits was high, with around 80 percent of the arithmetic-logic units fully functional, their non-fault tolerant design meant only a few percent of finished devices worked properly.