| 摘要 |
<p>PURPOSE:To normally execute both an initializing processing and the DMA transfer of an input data even when a data strobe signal is inputted in the middle of initializing execution. CONSTITUTION:When the data strobe signal is inputted in the middle of the initializing execution, the data strobe signal is held by a flip-flop 16 and until an inside initializing request signal is turned to an ungenerated state, the start of a DMA controller 18 is inhibited by an AND gate 17. Then, when the inside initializing request signal is turned to the ungenerated state, the held data strobe signal is transmitted to the DMA controller 18 and data transfer is executed. Therefore, the initializing processing is not interrupted, and both the initializing processing and the data transfer processing can be normally executed.</p> |
