Abstract: (A portable device (1) for processing data (D) is equipped with first memory means (2) for storing said data (D), wherein the first memory means (2) are arranged to be stopped providing said data (D) to be processed, and comprises second memory means (3) for storing a portion of said data (D) in order to provide the stored data for processing while the first memory means (2) are stopped providing said data and comprises interface means (7) for receiving a first command provided by a user for stopping said first memory means (2) providing data (D) and for producing a stop signal (S) in response to the received first user command and comprises processing means (4) for receiving the stop signal (S) and for stopping said first memory means (2) providing data (D) in response to the received stop signal (S) and for processing data (D) provided by the second memory means (3) while the first memory means (2) are stopped providing data (D).