诸如UT62256,GM76C256,IS61LV5128等SRAM芯片，基本上他们的时序操作大同小异，在这里总结一些它们共性的东西，也提一些简单的快速操作SRAM的技巧。-UT62256, such as an SRAM chips, GM76C256 IS61LV5128 etc, they are the same, the timing operation here summarized some things in common, they have also mentioned so