SD/eMMC PHY
时间: 2023-08-26 08:07:25 浏览: 78
SD/eMMC PHY是指SD卡和eMMC芯片的物理层接口。它负责将数据从SD卡或eMMC芯片传输到主机或从主机传输到SD卡或eMMC芯片。SD卡和eMMC芯片的数据传输流程通常包括以下步骤:初始化、选中操作的SD卡或eMMC芯片、读写操作。在初始化阶段,通过CMD7命令选中要操作的SD卡或eMMC芯片,然后可以开始对其进行读写操作。在物理层接口中,可以通过设备文件/dev/mmcblk1p1来查看SD卡或eMMC的信息。例如,通过执行命令"ls -l /dev/mmcblk1p1"可以显示SD卡或eMMC的权限、所有者、大小、时间等信息。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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