Designers are under constant pressure to innovate yet keep their intellectual property (IP) secret, while also lowering power consumption and cost. This made the RISC-V open-source hardware instruction set architecture (ISA) interesting for designers of processors for mobile applications. Now that RISC-V is an option for microcontrollers, designers of embedded systems and consumer devices need a quick on-ramp to start their own RISC-V designs.
article: https://www.digikey.com/en/articles/techzone/2020/jan/how-to-get-started-with-risc-v-based-microcontrollers