| 摘要 |
PROBLEM TO BE SOLVED: To provide a data transfer controller, electronic equipment and a data transfer control method, supporting various data transfer speeds, and reducing power consumption without reducing data transfer processing ability. SOLUTION: This data transfer controller 30 includes: a serial data processing part 32 transferring serial data via a serial bus; a parallel data processing part 34 performing a data transfer process for parallel data into which the serial data are converted; a transfer mode detection part 36 detecting a data transfer mode of the serial bus; and a clock generation part 38 generating an operation clock supplied to each part. When it is decided that the data transfer mode is a high-speed first transfer mode, the clock generation part 38 omits reduction control of a frequency of the operation clock of the parallel data processing part 34 and the serial data processing part 32. When it is decided that the data transfer mode is a low-speed second transfer mode, the clock generation part 38 omits the reduction control of the frequency of the operation clock of the serial data processing part 32, and performs the reduction control of the frequency of at least a part of the operation clocks of the parallel data processing part 34. COPYRIGHT: (C)2005,JPO&NCIPI
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