We have not tested the software sequence of Fujitsu FRAM on our device. We cannot guarantee that this software reset will work or not. It may work or it may not work but we cannot be certain of it until we test it. Have you implemented on our FRAM device? Do you have any observations to share?
One more point which we will like to add is that for a FRAM chip there is not much utility for for a software reset. If a I2C communication failure is there which will be indicated by a NACK you can stop and start again or give a restart.