RX62N write data in internal memory instead of eeprom

Hi all ,

i have an RX62N   i am able to write/read  data in external  eprom  . Now i have a little problem

if i use the NMI ( setting vdet2  ) on power off  i have not sufficient time to write this data about 10 words  and can write just 3/10 

i just want to know if i can acces  for store and read in internal memory ..... thinking is more fast!

 

Thanks for reply