In device's errata sheet , we've found a statement 2.2.13 which says that MCUs with system bootloader V9.2 is not functional .But MCUs with system bootloader V9.5(date code after W05 2020) is functional.
As of today ,for R&D purposes , we have 15 custom boards with MCUs with V9.2 bootloader ,is there a way to flash a new version(V9.5) of system bootloader to existing MCUs ?
