| 摘要 |
A communication amount monitoring circuit (124) monitors a transmission buffer (123) to which communication data (122) is inputted, and determines whether the amount of the communication data is relatively large or small. In a case of a relatively large amount of information per a unit time, the information is read as communication data (137) from the transmission buffer (123) by use of chip clocks, and then modulated by a modulator (139) for transmission. In a case of a relatively small amount of information, the information is read from transmission buffer (123) by use of clocks obtained by frequency dividing the chip clocks, and then applied to an exclusive-OR together with a spread code generated by use of the chip clocks, and then modulated by the modulator (139), and then transmitted as communication data (137). Since there is no change in the frequency of the communication data (137), there is no need to provide any resynchronization on the receiving apparatus side during switching between the large and small amounts of information, so that there is no need to provide any buffer region for resynchronization. |
