SPRUIU1C July 2020 – February 2024 DRA821U , DRA821U-Q1
Table 4-38 shows configuration pins assignment to functions when boot mode is the USB mode.
BOOTMODE Pins | Field | Value | Description | MCU Only=1 Value |
---|---|---|---|---|
6 (7)(1) | Port | 0 | Port 0 | N/A |
1 | Reserved | |||
5 | Mode | 0 | DFU (USB device firmware upgrade) | N/A |
1 | Reserved | |||
4 | Lane Swap | 0 | D+/D- lines are not swapped | N/A |
1 | D+/D- lines are swapped |
Table 4-39 summarizes the USB pin configuration done by ROM code for USB boot device on port 0.
Device Pin | Module Signal | Pull Enable | Pull Direction | Driver Index | Rx En/Dis | Tx En/Dis | Pinmux Sel |
---|---|---|---|---|---|---|---|
USB0_DRVVBUS | USB0_DRVVBUS | Enable | Down | 0 | Disable | Enable | 0 |
Note that other USB pins do not have pin mux options.