/* | |
* 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; | |
}; |