标题: 哪位大侠知道DDR4中VPP是干嘛的？ [打印本页] 作者: kobeismygod 时间: 2016-9-12 15:48 标题: 哪位大侠知道DDR4中VPP是干嘛的？ 看到DDR4多了一个VPP的电压，说是字位电压，看起来DDR3应该也需要这个电压，现在DDR4把它单拉出来有啥好处？% l8 ]+ ^* ]# q k3 [" l& E, t 作者: 超級狗 时间: 2016-9-12 18:42 節錄自 EE Times︰ u( Z/ f* n. W+ HThe DRAM word line requires higher voltages to activate the access transistor, ensuring fast access during the on state and ultra-low leakage during the off-state. The availability of the 2.5V VPP means that the word line voltage does not have to be inefficiently supplied (pumped up) from the 1.2V VDDQ supply, thereby improving energy/power efficiency.4 q, }1 n0 m, M5 @. s
