| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a data transfer circuit which can improve the data transfer rate of a communication path. <P>SOLUTION: A control part 10 constituting the data transfer circuit 1 stores, with one data transfer period, periodic transfer pointer information P_A and non-periodic transfer point information P_B read from a memory 3 respectively to a first and a second storage areas 20 and 30. The control part 10 successively transfers, in reference to the pointer information P_A and P_B, periodic transfer data D_A and non-periodic transfer data D_B read from the memory 3 to a communication bus 4. When transfer for a data length shown by the pointer information P_B cannot be completed in the transfer of the data D_B, the control part 10 updates the data length to a data length of the remaining data, and updates the address shown by the pointer information P_B to an address on the memory 3 of the remaining data. The control part 10 reads the remaining data from the memory 3 in reference to the pointer information P_B in the following data transfer period, and transfers the read data to the communication bus 4. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
