Break signals over uart

[awneil]

@awneil

This is described in a Maxim/Dallas App Note about their UART-to-1-Wire bridge chips

Found it: pdfserv.maxim-ic.com/en/an/AN192.pdf 8)

@AN192

The DS2480B is reset if it detects a space in the stop-bit position. The easiest way to generate this is with a serial break longer than a 9600 baud 8-bit word. If break is not available on the host UART then switching to a slower baud rate and sending a zero byte can simulate a break. Switching to space parity or changing to a 9-bit word length with a zero in the most significant bit can also simulate a break.