/*
 * Copyright (c) 2022 Thomas Stranger
 *
 * SPDX-License-Identifier: Apache-2.0
 */

&usart1_tx_pc4 {
	/*
	 * enable open-drain drive such that no external push-pull to
	 * open-drain converter is required. An external pull-up resistor
	 * with approximately R=5k resistance is suggested.
	 * Also a fixture connecting tx and rx pin is needed.
	 */
	drive-open-drain;
	bias-pull-up;
};