| 摘要 |
PURPOSE:To start easily a communication to a users who have changed their address or subscribed newly, by constituting the titled device so that a registered call code of a receiving device can be changed, added and erased easily. CONSTITUTION:In case of erasing a call code which has been registered in a RAM 31 in a receiving device contained in an electronic wrist watch, a call code writing circuit 60 makes a counter 54 count down, when a specified code for instructing an erasion is detected from a received message data. Subsequently, a registered call code of an address which is set from the counter 54 is outputted from the RAM 31, and this registered call code of 2 bytes and a call code of 2 bytes following the specified code are compared by a coincidence circuit 28. In case when they coincide, its coincident registered call code in the RAM 31 is erased. In this case, the call code writing circuit 60 brings a value of a pointer register 55 to a decrement, and always execute a control so as to indicate the largest address of the address in which the call code is stored. |
