下图是PROC114E3_SCH开发板中与eMMC相连的信号,想请教下对这部些信号有具体阻抗要求吗?

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eMMC 标准为 eMMC 设备定义了几种驱动强度,其中 50 欧姆是默认值。AM62x MMC 输出缓冲器仅支持 40 欧姆的单个输出阻抗。因此,建议以 40 到 50 欧姆之间的走线阻抗为目标。