本标准定义了1.2 V高速LVCMOS（HS_LVCMOS）接口的直流和交流输入电平、输出电平以及输入超调和欠调规格。非端接接口的开关范围名义上预期为0 V至1.2 V，主要用于支持与宽I/O SDRAM设备的通信。

This standard defines the dc and ac input levels, output levels, and input overshoot and undershoot specifications for the 1.2 V High-speed LVCMOS (HS_LVCMOS) interface. The non-terminated interface has a switching range that is nominally expected to be 0 V to 1.2 V and is primarily intended to support communications with Wide I/O SDRAM devices.