This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

请教几个DDR3的问题

Other Parts Discussed in Thread: DS90CR287

1. 每个地址线都接一个50欧姆电阻上拉到VTT的原因是什么?阻抗匹配还是增加驱动能力呢?如果是阻抗匹配为什么不能用ODT呢?(数据线有ODT)

如果是增加驱动能力,FPGA每个管脚驱动能力12mA~24mA,还不能驱动地址线吗?

2. 上拉到VTT的电阻都需要一个小电容吗?加电容的目的是什么呢?

非常感谢