| 摘要 |
A communication device with digital and analog circuits mixedly mounted thereon, for which the influence of noise generated in its interface part on the analog circuit part can be reduced, which does not interfere with the downsizing of the communication device. The communication device has a communication part, such as semiconductor communication device, and a control part, such as a semiconductor control device operable to control the communication part. The communication part and control part are operated in asynchronization with each other. The communication part includes an analog circuit. The interface circuit of the communication part, which is interfaced with the control part, receives a clock signal supplied from the communication part and conducts a synchronous interface. The control part stops supplying the clock signal during the time when the communication part operates the analog circuit.
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