JESD79F规范类资料. 学习内存的好东东.

The DDR SDRAM is a high--speed CMOS, dynamic random--access memory internally configured as a quad--bank DRAM. These devices contain the follow- ing number of bits: 64 Mb has 67,108,864 bits 128 Mb has 134,217,728 bits 256 Mb has 268,435,456 bits 51

DDR1 JEDEC 官方标准文档 ,适合从事DDR开发的人员，希望能帮助大家