| 摘要 |
<p>PURPOSE:To increase a processing speed and to reduce cost by providing plural control parts different in data processing speed and temporarily storing data to be sent and exchanging data between control parts. CONSTITUTION:A data storage part 7 mediates for data exchange between a control part CPU 2a and a digital signal processor DSP 3a different in data processing speed. By the accumulating part 7, a CPU 2a temporarily stores data to be transmitted through a data bus 4 to properly exchange data with the DSP 3a. An analog front end AFE 3b exchanges data with the DSP 3a and sends data to an NCU 6 which sends processed data to a telephone line. The NCU 6 controls transmission of data sent from the AFE 3b to the telephone line to increase the processing speed. The accumulating part 7, the CPU 2a, and the DSP 3a are provided on one substrate to reduce the cost.</p> |
