SPRUIU1C July 2020 – February 2024 DRA821U , DRA821U-Q1
Table 4-31 shows configuration pins assignment to functions when boot mode is the eMMC mode.
BOOTMODE Pins | Field | Value | Description | MCU Only=1 Value |
---|---|---|---|---|
6 | Port | 0 | Port 0 | N/A |
1 | Port 1 | |||
5 | Bus Width | 0 | Max width by port (8-bit on port 0, 4-bit on port 1) | N/A |
1 | 1-bit only | |||
4 | Voltage | 0 | 1.8V | N/A |
1 | 3.3V |
Table 4-32 summarizes the MMC pin configuration done by ROM code for eMMC on port 1.
Note that MMC Port 0 has no pin mux options.
Device Pin | Module Signal | Pull Enable | Pull Direction | Driver Index | Rx En/Dis | Tx En/Dis | Pinmux Sel |
---|---|---|---|---|---|---|---|
MMC1_DAT3(1) | MMC1_DAT3 | Enable | Up | 0 | Enable | Enable | 0 |
MMC1_DAT2(1) | MMC1_DAT2 | Enable | Up | 0 | Enable | Enable | 0 |
MMC1_DAT1(1) | MMC1_DAT1 | Enable | Up | 0 | Enable | Enable | 0 |
MMC1_DAT0 | MMC1_DAT0 | Enable | Up | 0 | Enable | Enable | 0 |
MMC1_CLKB | MMC1_CLKB | Disable | Up | 0 | Disable | Enable | 0 |
MMC1_CLK | MMC1_CLK | Disable | Up | 0 | Disable | Enable | 0 |
MMC1_CMD | MMC1_CMD | Enable | Up | 0 | Enable | Enable | 0 |
MMC1_SDCD | MMC1_SDCD | Enable | Up | 0 | Enable | Disable | 0 |