MAX485 DI pin problem

Discussion in 'Embedded Systems and Microcontrollers' started by anhnha, Apr 30, 2012.

  1. anhnha

    Thread Starter Active Member

    Apr 19, 2012
    Hi all,
    I used max485 in rs232-rs485.I am testing max485, in the receiver side pin RE is connected to ground and R0 is connected to TTL inputs of max232.DI is not used and is not connected to anything.And this max485 is used to receive data, but it fail in receiving.Could you tell if I need to connected DI to TTL output of max232?I know max485 function but I do not know max485 operation in receiving mode is effect by DI or not.
  2. hgmjr


    Jan 28, 2005
    It would assist us in helping you with your problem if you could post a schematic of the circuitry you are trying to debug.