The chip also introduces other enhancements. Compared with Arduino’s previous-generation chip, the amount of onboard SRAM cache in the Uno R4 has been increased from 2 kilobytes to 32 kilobytes.

Using a USB-C phone with Power Delivery is ideal here, as it allows the phone to be powered while also communicating with the Arduino over USB. The RemoteXY app is built specifically for this purpose.

For Google and Qualcomm, this chip represents everyone's first swing at a commercial RISC-V Android project, and as far as we can tell, it's the first announced mass-market RISC-V Android chip ever.