| 摘要 |
<p>PURPOSE:To decrease the execution step and to reduce the power consumption by processing in a hard way the DMA transfer without depending on a program instruction concerning a digital signal processing LSI to improve the method to transfer external data into an internal memory in a sleep condition. CONSTITUTION:At a sequence control part 2, a special instruction preparing part 22 to prepare a DMA transfer instruction with a completion flag SI as a trigger when a data reading completion flag SI from an interface part 3 is inputted at the time of a sleep condition is provided. The sequence control part 2, based on the DMA transfer instruction, directly controls the data transfer to an internal RAM 4 from the interface part 3 without passing through an instruction preparing part 1.</p> |
