SPRUIU1D July 2020 – December 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 configuration pins per boot mode is shown in Table 4-10. See the respective sections for details.
| Primary Boot Mode Config Pins(1) | Primary Boot Mode | ||
|---|---|---|---|
| 6 | 5 | 4 | |
| Speed | Hyperflash | ||
| Speed | Iclk | Csel | OSPI |
| Port | Iclk | Csel | QSPI |
| Port | Mode | Csel | SPI |
| Clkout | Delay | Link stat | Ethernet RGMII |
| Clkout | Clk src | Ethernet RMII | |
| Bus reset | Mode | Addr | I2C |
| Port | UART | ||
| Port | Bus width | Fs/raw | MMC/SD card |
| Port | Bus width | Voltage | eMMC |
| Port | Mode | Lane Swap | USB |
| Port | Ssc | Clocking | PCIe |
| SFDP | Pin Cmd | Mode | xSPI |
| Split | Arm/Thumb | No/Dev | No-boot/Dev boot |