![]() The UART line when idle is high at the I/O level, 3.3V or whatever the VCC of the MSP430 is set. ![]() UART transmits bits sequentially by pulling the UART line low for a fixed amount of time determined by the baud rate. UART is connected by crossing the TX and RX lines, as shown below: This makes the receiver capable of decoding the data. Being asynchronous, UART signals don’t require any other clock line because the two UART devices agree on a common baud rate, stop, start and data bits. From a pinout perspective, UART signals only require one line for unidirectional communications, although two are typically used for bi-directional transmit and receive. ![]()
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January 2023
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