In can be, but with limitations. Jumper J9 selects whether VDD_HV_IO_MAIN rail is connected to 5 or 3.3V.
Several information taken from datasheet:
“The device supports both 3.3 V and 5 V nominal I/O voltages. In order to use 3.3 V on the VDD_HV_IO_MAIN0 physical I/O segment, the HV supply low voltage monitor (VLVD400) must be disabled by DCF client. All other physical I/O segments are unaffected by the LVD400.”
“VDD_HV_PMC only available in the 416 BGA package. PMC supply is shorted to VDD_HV_IO_MAIN in the 512 BGA, with an external bypass capacitor connected to the VDD_HV_PMC_BYP ball. The flash read and P/E current, and PMC current apply to VDD_HV_IO_MAIN for the 512 BGA.”
“Flash read operation is supported for a minimum VDD_HV_PMC value of 3.15 V. Flash read, program, and erase operations are supported for a minimum VDD_HV_PMC value of 3.5 V.”
Thus I would say VDD_HV_IO_MAIN connected to 3.3V implicates flash memory used only in read-only mode in case DCF records are modified prior suppling by 3.3V.
Programming of DCF records is not simple task but it is documented in following application note:
http://www.nxp.com/files/microcontrollers/doc/app_note/AN5131.pdf
VDD_HV_IO_MAIN =3.3V
RESET LED D2 is on
