30.9 Normally-off computing with crystalline InGaZnO-based FPGA

An FPGA employing c-axis aligned crystal In-Ga-Zn oxide (CAAC-IGZO) FET [1] based configuration memories (CMs) is known to need no reconfiguration thanks to nonvolatile CMs, shows high operation speed due to boosting effect of pass gates used in routing switches (RS) [2], and easily realizes fine-grained multi-context (FG-MC) architecture [2] because CMs which need very low power to keep the contents can be constructed with a small number of transistors. It would be very difficult to realize all of these features in FPGAs using MRAM [3] or RRAM [4]. These features are very unique to the CAAC-IGZO FPGA.