| 摘要 |
A communication device capable of preventing the increase of production cost accompanying high functionality, and the decrease of communication speed of the entire system. This communication device (100) can communicate through a plurality of communication systems consisting of communication (A) and communication (B). An external memory (108) stores control data to be used for controlling the communication by each communication system, with respect to each communication system. A built-in memory (106) can read/write the control data at a higher speed than the external memory (108). A CPU (105) provides instructions to read the control data of the communication system to be used from the external memory (108), and to store the data in the built-in memory (106), and also, upon switching the communication system to be used, the CPU provides instructions to exchange the control data of the communication system prior to the switching which is stored in the built-in memory (106), with the control data of the communication system after the switching which is stored in the external memory (108). |
