SPRUJ17H March 2022 – October 2024 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1
Figure 13-173 shows the MMC/SD/SDIO0 host controller connected to an MMC, SD, or SDIO card and its related external connections.
The following MMC/SD/SDIO controller pins are used
Note: The MMC_CLK pin functions as an output but must be configured as an I/O to internally loopback the clock to time the inputs.
Table 13-240 provides a summary of these pins.
Pin | Type | 1-Bit Mode | 4-Bit Mode | 8-Bit Mode | Reset Value |
---|---|---|---|---|---|
MMC_CLK(1) | O | Clock Line | Clock Line | Clock Line | High impedance |
MMC_CMD | I/O | Command Line | Command Line | Command Line | High impedance |
MMC_DAT0 | I/O | Data Line 0 | Data Line 0 | Data Line 0 | 0 |
MMC_DAT1 | I/O | (not used) | Data Line 1 | Data Line 1 | 0 |
MMC_DAT2 | I/O | (not used) | Data Line 2 | Data Line 2 | 0 |
MMC_DAT3 | I/O | (not used) | Data Line 3 | Data Line 3 | 0 |
MMC_DAT4 | I/O | (not used) | (not used) | Data Line 4 | 0 |
MMC_DAT5 | I/O | (not used) | (not used) | Data Line 5 | 0 |
MMC_DAT6 | I/O | (not used) | (not used) | Data Line 6 | 0 |
MMC_DAT7 | I/O | (not used) | (not used) | Data Line 7 | 0 |