DRA785: DDR3 configuration – SDRAM_DRIVE question

About the SDRAM_DRIVE in TRM of DRA785:

About the SDRAM_DRIVE parameter , whether means drive impendence in SOC side?

• If yes , there are 34/40/48/60/80 source driver impendence in IBIS model ,  why only RZQ/6 =40, RZQ/7=34  can be selected ?
• If no,  what’s the exactly meaning of this parameter?

Nancy Wang：

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