| 摘要 |
PURPOSE:To achieve high-speed processing by improving the data movement processing performance of a microcomputer by moving data under the control of a direct memory access controller through the intervention of a data register. CONSTITUTION:A direct memory access controller DMAC3 which has >=2 free transfer channels and a data register 8 wherein moving data is stored temporarily are provided. Prescribed parameters regarding data movement are set to the said free transfer channels from a CPU2, respectively and after CPU2 is placed in a hold state, the control over respective devices in a microcomputer, an and a bus, etc., is transferred to the DMA, thereby moving data under the control of the DMAC3 through the intervention of a data register 8. |
