DDR2 controller

Discussion in 'General Electronics Chat' started by josephk, Feb 20, 2009.

  1. josephk

    Thread Starter New Member

    Feb 20, 2009
    My chip will have DDR2 controller built in and I am about to sign up the pin assignment. I would like to optimize the balls in a way that the board layout will be easy. I contacted a board layout house and gave them board netlist, which includes my chip (with preliminary pin assignment) and 4 discrete DDR2 devices and asked them to give me a suggestion about pin swap in order not having signal crossing and making sure that a Byte won't be split between two layers. They reply to me and say that beside the layout they need to do SI simulation.

    The question is - Do I need to do SI simulation for just pin optimization? The SI can be done later when I will do the final layout, right now I want to release my chip for Tapeout and would like to make sure the pins was selected correctely.