1/*
2 * Copyright (c) 2022 Thomas Stranger
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7&usart1_tx_pc4 {
8	/*
9	 * enable open-drain drive such that no external push-pull to
10	 * open-drain converter is required. An external pull-up resistor
11	 * with approximately R=5k resistance is suggested.
12	 * Also a fixture connecting tx and rx pin is needed.
13	 */
14	drive-open-drain;
15	bias-pull-up;
16};
17