Dependability-increasing technique for a multi-context optically reconfigurable gate array

Optically reconfigurable gate arrays (ORGAs) have been developed as a type of multi-context field programmable gate array. An ORGA's programmable gate array with more than 100 reconfiguration contexts can be reconfigured in nanosecondorder. In addition to that beneficial feature, ORGAs can be reconfigured with invalid configuration data that have been damaged by high-energy charged particles in a radiation-rich space environment. Even if 35 % or 5,915 pixels of holographic memory data are damaged by high-energy charged particles, the ORGA can execute configuration operations correctly. Therefore, ORGAs are sufficiently robust devices for use in spaceradiation environments. This paper presents a proposal of a more advanced dependability-increasing technique on a multicontext ORGA. This technique can raise the ORGA's level of configuration dependability even further by exploiting multicontext implementation.