The non volatile memory in the XRP7704 and XRP7714 families is highly reliable and has been used in military rad hard Actel FPGAs. One should note that even if the non volatile memory has already been written, it may still be possible to change certain functions because even though a written “1” cannot be changed, a “0” can always be changed to a “1”. The new XRP7724 uses instead a YFLASH technology which can be re-written up to 100 times.