| 摘要 |
<p>PURPOSE:To reduce the power consumption of an arithmetic processor in continuously pressing of keys by judging whether operation processing is in time for the input of a user or not and driving the operation processing at a low clock frequency when the processing is in time. CONSTITUTION:An input buffer 30 is a circular buffer for storing input information 33 from a keyboard or the like, a storage pointer 31 instructs a place for storing the input information, and a read-out pointer 32 instructs input information to be next taken out. When only one kind of input information is stored in the input buffer 30 at the time of input buffer read processing, the clock frequency of the operation processor is decreased since the processing is in time for input speed and when over two kinds of input information are stored, the clock frequency is increased since it is considered the processing is not in time. Next, the input information is possessed in the input buffer 30, the read-out pointer 32 is advanced for one forward, and processing is executed corresponding to the input information.</p> |
