SPRUI30H November 2015 – May 2024 DRA745 , DRA746 , DRA750 , DRA756
Figure 25-47 shows the different steps that allow changing the eMMC/SD/SDIO bus width.
Figure 25-47 eMMC/SD/SDIO Controller Bus Width Configuration Flow| Register Name | Register Name | Register Name |
|---|---|---|
| MMCHS_RSP10 | MMCHS_RSP32 | MMCHS_RSP54 |
| MMCHS_RSP76 | MMCHS_CON | MMCHS_HCTL |
| Subprocess Name | Cross-Reference |
|---|---|
| Initialize module and card. | See Section 25.5.1.1.2, eMMC/SD/SDIO Host Controller Initialization Flow. See Section 25.5.1.2.1.1, Card Detection, Identification, and Selection. |
| Send a SEND_CSD command (CMD9). | See Section 25.5.1.2.1.7.1, Command Transfer Flow. |
| Send SWITCH command (CMD6). | See Section 25.5.1.2.1.7.1, Command Transfer Flow. |