SPRUIU1C July 2020 – February 2024 DRA821U , DRA821U-Q1
When in normal boot flow (MCU Only = 0), it is possible to modify certain peripheral settings, such as chip-select, bus speed, and others depending on the peripheral selected.
The mapping of the backup configuration pin per boot mode selected is shown in Table 4-11. See the respective sections for details.
Backup Boot Mode Config Pin(1) | Backup Boot Mode Pins | Backup Boot Mode | ||
---|---|---|---|---|
7 | 3 | 2 | 1 | |
0 | 0 | 0 | None (no backup boot will be attempted) | |
Port | 0 | 0 | 1 | USB – Device (DFU) |
Port | 0 | 1 | 0 | Reserved |
Port | 0 | 1 | 1 | UART |
I/F | 1 | 0 | 0 | Ethernet |
Port | 1 | 0 | 1 | MMC/SD card |
Port | 1 | 1 | 0 | SPI |
Mode | 1 | 1 | 1 | I2C |