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LDmicro Forum - parallel connection of uart ports

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parallel connection of uart ports (by Evan Raftery)
Is it possible to parallel connect UART ports to create parallel serial connections of MCU,s sharing the same baud rates etc?

Are there any interference issues that may arise from this?
Sun May 8 2011, 17:14:21
(no subject) (by David R)
you can connect the receive together
but not the TX.
For the Tx you can use A "and" gate to link 2 or more,
you need to link some GPIO pins of the MCU to flow control so two can't transmitt at the same time.

The "and" gates work because the UART line is high with no data so when the pin pulls low then the output of the "and" gate goes low.
Regards
David
Mon May 9 2011, 00:43:07
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