You can use an MCU as a controller. Here's an example. https://youtu.be/m8rK9gU30v4 https://youtu.be/m8rK9gU30v4 The problem is that you can't make every cont

You can use an MCU as a controller. Here's an example. https://youtu.be/m8rK9gU30v4 https://youtu.be/m8rK9gU30v4 The problem is that you can't make every controller with an MCU, and you can't always make a competitive controller with an MCU. There are already controller ICs that are configurable. In fact, modern controllers are a mix of analog and digital hardware. They do everything an MCU would do in that situation, but faster, less invasively, and with less power. Often, they do more than an MCU because they're not slowed down by an instruction cycle. See my comment before last for an example of a software-configurable hardware controller. Condition monitoring is a thing, and it's done with MCUs, DSPs, and FPGAs. But controllers sit on the non-isolated side of the gate driver, where they have basically no physical access to any useful signals. That's why condition monitoring is separate. The lookup table idea is used for motor control. It's called a firing angle table. But that's a slower application.