Dec 3, 2007 #1 K kender Advanced Member level 4 Joined Jun 19, 2005 Messages 1,425 Helped 138 Reputation 276 Reaction score 39 Trophy points 1,328 Location Stanford, SF Bay Peninsula, California, Earth, Sol Activity points 10,035 combining ttl outputs Colleagues, I need to connect the TTL outputs of two RS-232 drivers: MAX3221 and FT232R to one UART on a PIC. Only one transceiver will be transmitting to the PIC at a time. What’s the best way to combine: Open collector buffers with wired NOR? Gate NOR? Thanks, Nick
combining ttl outputs Colleagues, I need to connect the TTL outputs of two RS-232 drivers: MAX3221 and FT232R to one UART on a PIC. Only one transceiver will be transmitting to the PIC at a time. What’s the best way to combine: Open collector buffers with wired NOR? Gate NOR? Thanks, Nick