I'm developing a project where I want to link 4 IC's together. 1 master and 3 slaves for motor control. Can I just parallel the serial lines - 1 TX to three RX lines on the slave and link the TX lines of the slaves into the RX of the master.
I'm not worried about more than one slave trying to use the TX line at once.
or do I need to do impedance matching or use some form of transceiver?