RS232 and RS485 Serial BUS

Discussion in 'Embedded Systems and Microcontrollers' started by bctang, Nov 5, 2007.

  1. bctang

    Thread Starter Member

    Sep 5, 2004

    I have few questions.
    - According the MAX485 Table Function, in what condition we should set the /RE=1 and DE=0?

    - May i know RS232 can be connect many nodes in serial bus as Serial BUS Diagram shown. If yes, what's the different between RS232 and RS485 advantage and disadvantage, ex: data transfer speed, limited node, limited length and so on..

    - If the design is interface with the PC. Is it all the node on the serial bus (no matter RS232 or RS485) will be the Slave always in the listening mode?

    Thank You
  2. serialeasy

    New Member

    Feb 20, 2008
    Last edited: Apr 18, 2009