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RS 485 transceiver

Question asked by Greg84 on Feb 4, 2013
Latest reply on Feb 8, 2013 by hmarais

Hello to all,

 

I have a question about using RS485 transceiver. I have an external UART connected to ADM3485 transceiver. The UART is in RS485 automatic mode, RTS is connected to RE and DE pin. During the transmission, the RO pin connected to the UART RX is Hi Z and floating. The question is, should I use external pull up in the design or just discard the received data (if any) during the transmission?

 

Thanks,

 

Greg

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