An data processing device and method for protecting data loss thereof

PURPOSE: A data access memory and a data loss preventing method thereof prevent the loss of data in a power-off state by storing important data in a non-volatile memory. CONSTITUTION: A non-volatile memory module stores metadata. A volatile memory module (100) stores normal data. A delay controller (101) delays the input of an address signal and the normal data at a specific time in order that the volatile memory module shares a transmission line with a processor together with the non-volatile memory module.