用ModelSim仿真的时候提示:
# at time 480488 ns ERROR: Bank 0 is not Precharged.
# at time 482088 ns ERROR: All banks must be Precharge before Auto Refresh
# at time 482148 ns ERROR: Cannot Read or Write - Bank 0 is not Activated
# at time 483688 ns ERROR: All banks must be Precharge before Auto Refresh
# at time 483748 ns ERROR: Cannot Read or Write - Bank 0 is not Activated
# at time 505128 ns ERROR: All banks must be Precharge before Auto Refresh
# at time 525928 ns ERROR: All banks must be Precharge before Auto Refresh
# at time 546728 ns ERROR: All banks must be Precharge before Auto Refresh