Method of controlling portable device having facilities of storing and playing digital contents by computer and portable device operation method thereby

The present invention is a control method of a portable personal device having facilities of storing and playing digital contents through a computer and hence the method of operation of the portable apparatus is disclosed in accordance with. A method of a portable personal device operation having facilities of storing and playing digital contents by control from a computer operation method of a portable personal device according to the control of the computer through a serial or parallel cable in accordance with the present invention, (a ) receiving via the portable personal device a serial or parallel cable for formatting the request command from the computer requesting the format of the external memory in an external memory card inserted from the internal memory or external built in; (B) the reply that the portable personal device is ready to run when the format, the computer is ready to format through a serial or parallel cable; (C) when receiving the execution command in the step and (d) the (c) receiving through a serial or parallel cable for executing the command for the execution of the received format 'request command in the step (a) from the computer, perform the format of the memory, and the structure of the transmission data and the results which includes the step of replying to the computer through a serial or parallel cable, wherein the step (a) to (d) receive, or reply in step transmits data the start for indicating the start delimiter, characterized in that the intermediate separator character, an end separator character for indicating the end of a command code or state information, and transmit data indicating the start of a length information, a command code or state information of the transmission data It shall be. According to the invention, of the portable device inside the communication module and a computer on the communication application in accordance with a standardized interface available via a serial or parallel cable between a portable personal device having facilities of storing and playing a computer and a digital content can reduce development time, as well as be compatible between the two kinds of personal mobile devices developed by companies, it is possible to increase the efficiency of the quality assurance of personal mobile devices. Further, the standardized interface between a computer and a portable personal device according to the present invention and facilitate the expansion of new function in the portable personal device, the security functions of digital contents is well supported.