| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the peak value of a write current to be generated in the case of parallel write processing to plural flash memories. SOLUTION: A memory card 1 has plural flash memories FMa1... having electrically reloadable non-volatile memory cells and control means 2 and 3 for accessing the flash memories, and when performing parallel write operation to plural flash memories, the control means deviate a timing to impress a write voltage among these plural flash memories. Thus, the peak value of a write current to be generated in the case of parallel write processing to the plural flash memories can be reduced, and while suppressing the increase in the capacity of a power source circuit, time for write operation due to write interleaving can be shortened.</p> |
