One example are chips embedded in connectors, like for example what you see here https://www.ifixit.com/News/8448/apple-audio-adapter-teardown https://www.ifixi

One example are chips embedded in connectors, like for example what you see here https://www.ifixit.com/News/8448/apple-audio-adapter-teardown https://www.ifixit.com/News/8448/apple-audio-adapter-teardow... Although those are probably always some more specialized ASICs instead of some general purpose MCUs