There is growing interest within the SoC Labs community for an Arm A-Class SoC that can support a full operating system, undertake more complex compute tasks and enable more complicated software directed research. The Cortex-A53 is Arm's most widely deployed 64-bit Armv8-A processor and can provide these capabilities with power efficiency. 

This project developed a 2-tier 3D-stacked Cortex-M0 SoC, in 65nm CMOS technology, with wireless inter-tier power and data transfer through an inductively coupled bus which achieved 20.3Gbps/mm2 data, and 7.1mW/mm2 power transfer simultaneously through a 250 µm channel. At the time of publishing it was the smallest ever reported inductive data and power link.