| 摘要 |
<P>PROBLEM TO BE SOLVED: To save the power consumed by a DRAM which is used as a buffer in which packets are stored during a shaping process. <P>SOLUTION: A buffer 30 consists of a memory unit 31-1 for high priority, a memory unit 31-2 for middle priority and a memory unit 31-3 for low priority. When packets are stored in a buffer during a shaping process, data is stored in a memory unit 31 whose priority level matches that of the data. At this time, as for the memory unit 31-3 for lower priority, one packet data is made to be stored within one column. On top of that, the buffer is configured in such a way that, as for the memory unit 31-1 for high priority and the memory unit 31-2 for middle priority, auto refresh is executed, and, as for the memory unit 31-3 for low priority, column-specified refresh, which is targeted for only a column having data stored therein, is executed. <P>COPYRIGHT: (C)2013,JPO&INPIT |
