Along with a
CPU, an
SoC usually contains a GPU (a graphics
processor), memory, USB controller, power management circuits, and wireless radios (WiFi, 3G, 4G LTE, and so on). Whereas a
CPU cannot function without dozens of other chips, it's possible to build complete computers with just a single
SoC.
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A system on a chip (SoC) combines the required electronic circuits of various computer components onto a single, integrated chip (IC). SoC is a complete electronic substrate system that may contain analog, digital, mixed-signal or radio frequency functions.