说明：  Nand Flash与Nor Flash 的区别（Nand Flash与Nor Flash经常在一些地方被提到，一直没认真去理解它们的区别，因此，今天花了一段时间仔细理解了一下，下面把我的笔记放在这里：
(Nand Flash and the distinction Nor Flash (Nand Flash Nor F lash frequently in some places have been raised had never seriously to understand their differences, therefore, Today, spent some time to understand it, and below my notebook on here :)