The invention relates to an integrated circuit card (1) comprising: an input/output block (4) for receiving external command data from an interface device (2); a central processing unit (CPU) (3) in signal communication with the input/output block (4) for performing a task corresponding to the received command data; a judgement block (5) in signal communication with the central processing unit (3) for judging whether a working time of the central processing unit (3) reaches a reference time, after an input of the external command data is completed; and a control block (6) in signal communication with the judgement block (5) for operating responsive to an output of the judgement block, wherein the control block controls such that a S(WTX request) is output via the input/output block (4) without intervention by the central processing unit whenever the interface device (2) connected to the integrated circuit card (1) transmits a command to the integrated circuit card and the integrated circuit card is not able to respond to this command within the defined maximum waiting time.