SPRUIU1D July 2020 – December 2024 DRA821U , DRA821U-Q1
Table 12-725 lists the RS-485 interface input/output (I/O) signals.
| Module Pin | Device Level Signal | I/O(1) | Description | Module Pin Reset Value(2) |
|---|---|---|---|---|
| WKUP_UART0 | ||||
| RX | WKUP_UART0_RXD | I | Serial data input | HiZ |
| TX | WKUP_UART0_TXD | O | Serial data output | 1 |
| DIR | WKUP_UART0_RTS | O | RS-485 Direction | 1 |
| MCU_UART0 | ||||
| RX | MCU_UART0_RXD | I | Serial data input | HiZ |
| TX | MCU_UART0_TXD | O | Serial data output | 1 |
| DIR | MCU_UART0_RTS | O | RS-485 Direction | 1 |
| UART[0-9] | ||||
| RX | UART[0-9]_RXD | I | Serial data input | HiZ |
| TX | UART[0-9]_TXD | O | Serial data output | 1 |
| DIR | UART[0-9]_RTSn | O | RS-485 Direction | 1 |
For more information about device level signals (pull-up/down resistors, buffer type, multiplexing and others), see tables Pin Attributes and Pin Multiplexing in the device-specific Datasheet.