The U.P. (Undiluted Platinum) is a flash replacement system for the PSP™ which allows the use of previous flash updates or custom firmware builds, opening up the possibility to run unsigned homebrew code on even the latest PSP systems. The U.P. contains 32MB NAND flash which is programmable from the PC via a high speed USB connection, using our user friendly software. You may boot the PSP from either its onboard flash or the flash contained on the U.P; the flash which is used is determined by a button press as the PSP is powered on (U.P. flash is used by default, hold L1 to use the PSP onboard flash). Since U.P. provides a secondary flash which the PSP can boot from, it can even be used to restore a PSP which has been "bricked". Every effort has been made to make our flash updater software, which will be freely available for download, both as easy to use and reliable as possible. The software also contains diagnostics which can be used by installers to determine if an installation has been successful or not.
Doesnt this mean the original flash chip can be restores?