SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
The eMMC/SD/SDIO1 controller can operate with two types of card voltages: 1.8 V and 3.3 V. For this reason, dual voltage pads are implemented on this interface. For technological concerns, those pads must have an internal bias voltage reference to operate. The PBIAS module supplies this bias voltage, depending on the settings of the CTRL_CORE_CONTROL_PBIAS register.
For more information about the PBIAS cell, see PBIAS Cell And MMC1 I/O Cells Control Registers, in Control Module.
Figure 27-48 shows how to configure the MMC1 controller to fit with power switching sequence.
Register Name | Register Name |
---|---|
MMCHS_STAT | MMCHS_PSTATE |
MMCHS_CMD | MMCHS_CON |
Subprocess Name | Cross-Reference |
---|---|
Send a READ_DAT_UNTIL_STOP command (CMD11). | See Section 27.5.1.2.1.7.1, Command Transfer Flow. |