SPRUI97E May 2017 – September 2025
The interface voltage for the eMMC is fixed at 3.3V in all modes of operation. This prevents support of HS200 which requires a transition to 1.8V. The AM571x IDK EVM does support this voltage shift for the SDCARD attached to the MMC1 port. The MMC1 port is on VDDSHV8 supply that is attached to the LDO1 PMIC output that supports this voltage shift for higher speed modes. The eMMC is attached to the VDDSHV11 supply fixed at 3.3V. Board designs that require HS200 support for eMMC would need a solution to transition from 3.3V to 1.8V under software control.