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5v Tolerant UART on STM32H753

Question asked by Yan Rosh on May 30, 2018
Latest reply on May 31, 2018 by Yan Rosh



We want to connect a 5v UART device to our STM32H753 MUC through one of the 5v-tolerant UART_RX pins.

The MCU IO voltage is 1.8v.

The UART is one-directional, from the 5v device to a UART_RX pin, for example PB15.


Is there anything we need to take into account here? Is there an internal pull-up/down on pin?


Thanks in advance,