if it is just for a few seconds you could go with EEPROM i think..
you may want to have a look at those running I2C with 512kb
http://www.ramtron.com/products/nonvolatile-memory/serial.aspx
if it is just for a few seconds you could go with EEPROM i think..
you may want to have a look at those running I2C with 512kb
http://www.ramtron.com/products/nonvolatile-memory/serial.aspx