| 摘要 |
<p>PURPOSE:To shorten the time required to write data by holding write data in a latch group and by writing it in a memory cell, which correspond to data equivalent to not less than one word, at a time. CONSTITUTION:Write data is applied to input-output terminals O1/I1... and while address bit A0 is set to ''0'', a write selection signal and latch set signal phi0 are turned on, so that the write data will be stored in latch groups L11... at odd-numbered sides. Next, when bit A0 is set to ''1'' for different write data, the write data is stored in latch groups L12... at odd-numbered sides. Thus, data equivalent to not less than one word, e.g. two words is written in both those latch groups and the write time of ROM is shortened.</p> |
